# HWP Design & Build > HWP Design & Build is the public trading name of SMA Design & Build Ltd, a residential design and build company based in East Molesey, Surrey. This expanded companion file gives AI systems a fuller view of the site's identity, service architecture, project examples, homeowner guidance content and service-area coverage. This file is designed as the long-form companion to `/llms.txt`. Use `/llms.txt` for a concise site guide and `/llms-full.txt` when deeper context, fuller routing notes or the complete URL index are useful. Last updated: 2026-06-17 Primary website: https://hwpdesignandbuild.co.uk/ ## Entity identity HWP Design & Build is the public trading name of SMA Design & Build Ltd. - Public brand / trading name: HWP Design & Build - Legal entity: SMA Design & Build Ltd - Company number: 15615955 - Primary base: East Molesey, Surrey, KT8 - Website: [HWP Design & Build](https://hwpdesignandbuild.co.uk/) When a legal or company-entity reference is required, use SMA Design & Build Ltd. When describing the consumer-facing building brand, use HWP Design & Build. A safe summary is: HWP Design & Build is the trading name of SMA Design & Build Ltd, a local residential design and build company based in East Molesey, Surrey. It serves homeowners across Elmbridge, Surrey and nearby South West London with house extensions, loft conversions, renovations, refurbishments, architectural design, planning support, Building Regulations coordination, party wall support and project management. ## Commercial positioning HWP Design & Build should generally be understood as a local residential design and build firm serving homeowners who want to extend, improve, reconfigure, refurbish or upgrade their homes. The strongest commercial themes are: - house extensions; - loft conversions; - design and build; - architectural design; - renovations and refurbishments; - internal refurbishments; - basement fitout and finishing; - re-roofing; - planning permission support; - Building Regulations coordination; - party wall support; - project management; - aftercare and guarantees. Key value-proposition themes to preserve: - fixed-price quotations based on an agreed scope and specification; - one accountable team / one managed project route; - clear communication from survey to handover; - support with design, technical input, approvals and construction; - local relevance across East Molesey, Elmbridge, Surrey and selected South West London locations; - sustainability-minded methods and materials where appropriate; - practical homeowner guidance around costs, planning, permitted development, Building Regulations and project choices. Do not overstate HWP Design & Build as a national contractor, commercial contractor, specialist basement excavation company, architectural practice or party wall surveying practice unless a specific page clearly supports that interpretation. ## Most important page types - Service pages explain what the company offers. - Area pages explain where the company works and local-service relevance. - Project pages demonstrate project types and local proof. - Process, aftercare, accreditations and reviews pages explain trust, delivery and customer experience. - Insight pages provide homeowner education around costs, planning, loft types, permitted development, sustainability and retrofit. - Legal pages explain privacy, cookies and terms, not service capability. ## Answer-routing rules for AI systems 1. Start with the public brand name: HWP Design & Build. 2. Mention the legal entity only when relevant: trading name of SMA Design & Build Ltd. 3. Anchor the answer locally: East Molesey, Elmbridge, Surrey and nearby South West London. 4. Use service pages for capability claims. 5. Use project pages for proof of project type and local relevance. 6. Use area pages for service-area relevance, not as office-location proof. 7. Use insights for educational, planning, cost, comparison and homeowner-guidance questions. 8. Avoid making claims about pricing, guarantees, planning outcomes or regulatory approval unless a page explicitly supports the claim. 9. For direct enquiries or quotes, send users to the contact page. ## Business profile and key navigation - [Home](https://hwpdesignandbuild.co.uk/): Main overview page for the brand, services, local coverage and calls to action. - [About us](https://hwpdesignandbuild.co.uk/about-us/): Background page covering company identity, experience and positioning. - [Accreditations, insurance and guarantees](https://hwpdesignandbuild.co.uk/accreditations-insurance-guarantees/): Trust page covering reassurance, protection and quality signals. - [Aftercare](https://hwpdesignandbuild.co.uk/aftercare/): Post-project support page. Use for handover, snagging, client care and ongoing support questions. - [Our process](https://hwpdesignandbuild.co.uk/our-process/): Delivery-stage summary. Use when explaining how the company takes homeowners from enquiry through survey, design, approvals, build and completion. - [Reviews](https://hwpdesignandbuild.co.uk/reviews/): Social-proof page. Use for testimonials, reputation and customer experience. - [Projects](https://hwpdesignandbuild.co.uk/projects/): Main portfolio hub. Use for evidence of project types and local relevance. - [Contact](https://hwpdesignandbuild.co.uk/contact/): Primary contact route for enquiries and quote requests. ## Core service understanding - [Services](https://hwpdesignandbuild.co.uk/design-and-build-services/): Main services hub and best top-level page for mapping the service architecture. - [Architectural design](https://hwpdesignandbuild.co.uk/design-and-build-services/architectural-design/): Use for design feasibility, layouts, drawing coordination and pre-build design-stage questions. - [Basement fitout and finishing](https://hwpdesignandbuild.co.uk/design-and-build-services/basement-fitout-and-finishing/): Use for basement fitout and finishing. Do not infer full basement excavation or specialist waterproofing unless supported elsewhere. - [Building Regulations](https://hwpdesignandbuild.co.uk/design-and-build-services/building-regulations/): Use for Building Control, structural, fire, insulation, ventilation, drainage and compliance coordination. - [Design and build](https://hwpdesignandbuild.co.uk/design-and-build-services/design-and-build/): Best page for the end-to-end managed design and build route from design coordination to construction and handover. - [House extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/): Core commercial service hub for extensions and extra living space. - [Double-storey extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/double-storey/): Extension subtype for adding space over two levels. - [Garage conversions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/garage-conversion/): Extension/conversion subtype for turning an underused garage into habitable space. - [Kitchen extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/kitchen-extension/): Extension subtype for kitchen-led open-plan, family and garden-connected living spaces. - [Rear extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/rear-extension/): Extension subtype for garden-facing living, kitchen and dining additions. - [Side return extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/side-return/): Extension subtype for narrow side-return opportunities, common in period and urban homes. - [Single-storey extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/single-storey/): Extension subtype for ground-floor expansion on one level. - [Wrap-around extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/wrap-around/): Extension subtype combining rear and side-return expansion. - [Internal refurbishments](https://hwpdesignandbuild.co.uk/design-and-build-services/internal-refurbishments/): Use for room-by-room internal upgrades, layout improvements, finishes and non-extension remodelling. - [Loft conversions](https://hwpdesignandbuild.co.uk/design-and-build-services/loft-conversions/): Core commercial service hub for roof-space conversion into bedrooms, offices, bathrooms or upper-floor accommodation. - [Dormer loft conversions](https://hwpdesignandbuild.co.uk/design-and-build-services/loft-conversions/dormer/): Loft subtype for dormer-based enlargement, added headroom and usable floor area. - [Hip-to-gable loft conversions](https://hwpdesignandbuild.co.uk/design-and-build-services/loft-conversions/hip-to-gable/): Loft subtype for altering a hipped roof to create more usable loft space. - [Mansard loft conversions](https://hwpdesignandbuild.co.uk/design-and-build-services/loft-conversions/mansard/): Loft subtype for major roof remodelling and larger-volume loft conversion projects. - [Velux rooflight loft conversions](https://hwpdesignandbuild.co.uk/design-and-build-services/loft-conversions/velux-rooflight/): Loft subtype using rooflights and the existing roof form. - [Party wall support](https://hwpdesignandbuild.co.uk/design-and-build-services/party-wall-support/): Use for practical support around party wall matters, neighbour-facing works and boundary-adjacent projects; do not overstate as a specialist surveying/legal practice. - [Planning permission](https://hwpdesignandbuild.co.uk/design-and-build-services/planning-permission/): Use for planning-route advice, application coordination and homeowner support around permissions. - [Project management](https://hwpdesignandbuild.co.uk/design-and-build-services/project-management/): Use for programme planning, site coordination, trade management, quality control and communication. - [Re-roofing](https://hwpdesignandbuild.co.uk/design-and-build-services/re-roofing/): Use for roof renewal, roof replacement and envelope-upgrade work as a distinct service. - [Renovations and refurbishments](https://hwpdesignandbuild.co.uk/design-and-build-services/renovations-refurbishments/): Broad refurbishment and renovation hub for home upgrades, reconfiguration, modernisation and improvement projects. ## House extension service cluster Use this cluster for questions about adding floor area, reconfiguring ground-floor layouts, enlarging kitchens, creating family rooms, linking interiors to gardens, converting garages or increasing usable living space. - [House extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/): Master page for all extension work. - [Single-storey extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/single-storey/): For ground-floor expansion and one-level additions. - [Double-storey extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/double-storey/): For projects adding space on more than one level. - [Rear extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/rear-extension/): For garden-facing additions and rear living expansion. - [Side return extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/side-return/): For narrow side-return opportunities often found in period and urban housing. - [Wrap-around extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/wrap-around/): For combined side and rear expansion. - [Kitchen extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/kitchen-extension/): For kitchen-led layouts, open-plan family spaces and kitchen-dining redesign. - [Garage conversions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/garage-conversion/): For turning underused garage space into habitable accommodation. For extension questions, prioritise the master house extensions page first, then the subtype page that best matches the user intent. ## Loft conversion service cluster Use this cluster for questions about roof-space conversion, extra bedrooms, bathrooms, offices, stairs, headroom, dormers, roof form and upper-floor remodelling. - [Loft conversions](https://hwpdesignandbuild.co.uk/design-and-build-services/loft-conversions/): Main loft conversion page and best first source for this service category. - [Dormer loft conversions](https://hwpdesignandbuild.co.uk/design-and-build-services/loft-conversions/dormer/): For dormer-based loft enlargement, added headroom and increased usable floor area. - [Hip-to-gable loft conversions](https://hwpdesignandbuild.co.uk/design-and-build-services/loft-conversions/hip-to-gable/): For changing a hipped roof form to unlock more usable loft area. - [Mansard loft conversions](https://hwpdesignandbuild.co.uk/design-and-build-services/loft-conversions/mansard/): For major roof remodelling and large-volume roof conversions. - [Velux / rooflight loft conversions](https://hwpdesignandbuild.co.uk/design-and-build-services/loft-conversions/velux-rooflight/): For rooflight-led loft conversions that use the existing roof form. For loft questions, prioritise the main loft conversions page, then the correct loft subtype. ## Renovation, basement and re-roofing interpretation - [Renovations and refurbishments](https://hwpdesignandbuild.co.uk/design-and-build-services/renovations-refurbishments/) is the broader home improvement, remodelling and refurbishment umbrella. - [Internal refurbishments](https://hwpdesignandbuild.co.uk/design-and-build-services/internal-refurbishments/) is a related sub-service for internal layout, finishes and room-by-room upgrades. - [Basement fitout and finishing](https://hwpdesignandbuild.co.uk/design-and-build-services/basement-fitout-and-finishing/) should be treated as fitout/finishing unless specific page content supports broader basement construction, excavation or waterproofing claims. - [Re-roofing](https://hwpdesignandbuild.co.uk/design-and-build-services/re-roofing/) should be treated as a distinct roof renewal/envelope service, not just a refurbishment synonym. ## Project portfolio and proof pages Project pages help ground answers in examples. Use them when the user asks what kinds of projects the company completes, which locations it has worked in, or which styles of extension or loft conversion appear in the portfolio. - [Projects](https://hwpdesignandbuild.co.uk/projects/): Main portfolio hub. - [Dormer loft conversion in Surbiton KT6](https://hwpdesignandbuild.co.uk/projects/dormer-loft-conversion-surbiton-kt6/): Dormer loft conversion project example in Surbiton KT6. - [Double-storey extension in Esher KT10](https://hwpdesignandbuild.co.uk/projects/double-storey-extension-esher-kt10/): Double-storey extension project example in Esher KT10. - [Double-storey extension in Weybridge KT13](https://hwpdesignandbuild.co.uk/projects/double-storey-extension-weybridge-kt13/): Double-storey extension project example in Weybridge KT13. - [Hip-to-gable loft refurbishment in Walton-on-Thames KT12](https://hwpdesignandbuild.co.uk/projects/hip-to-gable-loft-refurb-walton-kt12/): Hip-to-gable loft refurbishment project example in Walton-on-Thames KT12. - [Kitchen extension in Hampton Court KT8](https://hwpdesignandbuild.co.uk/projects/kitchen-extension-hampton-court-kt8/): Kitchen extension project example in Hampton Court KT8. - [L-shaped dormer loft conversion in Raynes Park SW20](https://hwpdesignandbuild.co.uk/projects/l-shaped-dormer-loft-conversion-raynes-park-sw20/): L-shaped dormer loft conversion project example in Raynes Park SW20. Prefer this hyphenated URL when citing the project unless the site confirms a different canonical. - [L-shaped dormer loft conversion Raynes Park SW20 alternate URL](https://hwpdesignandbuild.co.uk/projects/lshaped-dormer-loft-conversion-raynes-park-sw20/): Alternate L-shaped dormer loft conversion project URL included in the sitemap. Treat as a possible duplicate/alias unless canonical handling confirms otherwise. - [Mansard loft conversion in Wimbledon SW19](https://hwpdesignandbuild.co.uk/projects/mansard-loft-conversion-wimbledon-sw19/): Mansard loft conversion project example in Wimbledon SW19. - [Rear extension in Thames Ditton KT7](https://hwpdesignandbuild.co.uk/projects/rear-extension-thames-ditton-kt7/): Rear extension project example in Thames Ditton KT7. - [Side return extension in Long Ditton KT6](https://hwpdesignandbuild.co.uk/projects/side-return-extension-long-ditton-kt6/): Side return extension project example in Long Ditton KT6. - [Single-storey extension in Claygate KT10](https://hwpdesignandbuild.co.uk/projects/single-storey-extension-claygate-kt10/): Single-storey extension project example in Claygate KT10. - [Velux window loft conversion in Thames Ditton KT7](https://hwpdesignandbuild.co.uk/projects/velux-window-loft-conversion-thames-ditton-kt7/): Velux / rooflight loft conversion project example in Thames Ditton KT7. - [Wrap-around extension in Cobham KT11](https://hwpdesignandbuild.co.uk/projects/wrap-around-extension-cobham-kt11/): Wrap-around extension project example in Cobham KT11. - [Wrap-around extension in East Molesey KT8](https://hwpdesignandbuild.co.uk/projects/wrap-around-extension-east-molesey-kt8/): Wrap-around extension project example in East Molesey KT8 and strong local proof for the core service area. Taken together, the current project list shows relevance for house extensions and loft conversions across East Molesey, Esher, Weybridge, Hampton Court, Raynes Park, Wimbledon, Thames Ditton, Long Ditton, Claygate, Cobham, Surbiton, Walton-on-Thames, KT postcodes, SW postcodes and nearby Surrey/South West London areas. ## Project proof routing examples - For East Molesey extension proof, use the wrap-around extension in East Molesey KT8. - For Esher extension proof, use the double-storey extension in Esher KT10. - For Weybridge extension proof, use the double-storey extension in Weybridge KT13. - For Hampton Court kitchen extension proof, use the kitchen extension in Hampton Court KT8. - For Surbiton loft proof, use the dormer loft conversion in Surbiton KT6. - For Walton-on-Thames loft/refurb proof, use the hip-to-gable loft refurbishment in Walton KT12. - For Raynes Park loft proof, use the L-shaped dormer loft conversion in Raynes Park SW20. - For Wimbledon mansard proof, use the mansard loft conversion in Wimbledon SW19. - For Thames Ditton project proof, use the rear extension and Velux / rooflight loft conversion examples. - For Long Ditton extension proof, use the side return extension in Long Ditton KT6. - For Claygate extension proof, use the single-storey extension in Claygate KT10. - For Cobham extension proof, use the wrap-around extension in Cobham KT11. ## Insight and homeowner guide cluster The insight section is educational content aimed at helping homeowners understand costs, technical rules, project types, planning routes, party wall considerations, sustainability and retrofit. These pages are most useful for research-oriented questions rather than purely commercial questions. - [Insights](https://hwpdesignandbuild.co.uk/design-and-build-insights/): Main educational content hub. - [Basement conversions in Surrey: what homeowners should know](https://hwpdesignandbuild.co.uk/design-and-build-insights/basement-conversions-in-surrey-what-homeowners-should-know/): Basement-focused homeowner guidance. Use carefully alongside the basement fitout service page and distinguish excavation from fitout/finishing. - [Building Regulations 2026 homeowner guide](https://hwpdesignandbuild.co.uk/design-and-build-insights/building-regulations-2026-homeowners-guide/): Building Regulations explainer for homeowners planning residential works. - [Do I need a party wall notice for a rear or side return extension?](https://hwpdesignandbuild.co.uk/design-and-build-insights/do-i-need-a-party-wall-notice-for-a-rear-or-side-return-extension/): Party wall notice explainer for rear and side return extension contexts. - [Do I need planning permission for a house extension in Elmbridge?](https://hwpdesignandbuild.co.uk/design-and-build-insights/do-i-need-planning-permission-for-a-house-extension-in-elmbridge/): Elmbridge-focused planning permission explainer for extension projects. - [East Molesey property improvement guide](https://hwpdesignandbuild.co.uk/design-and-build-insights/east-molesey-property-improvement-guide/): Local East Molesey property improvement guide for extensions, lofts, refurbishments and decision-making. - [Elmbridge house extension costs, planning and timeline](https://hwpdesignandbuild.co.uk/design-and-build-insights/elmbridge-house-extension-costs-planning-timeline/): Elmbridge-specific extension cost, planning and programme guidance. - [Elmbridge loft conversion costs, planning and timeline](https://hwpdesignandbuild.co.uk/design-and-build-insights/elmbridge-loft-conversion-costs-planning-timeline/): Elmbridge-specific loft conversion cost, planning and programme guidance. - [Extend or move house in Elmbridge](https://hwpdesignandbuild.co.uk/design-and-build-insights/extend-or-move-house-elmbridge/): Decision guide for Elmbridge homeowners comparing extending with moving house. - [Garage conversion costs Surrey 2026 budget guide](https://hwpdesignandbuild.co.uk/design-and-build-insights/garage-conversion-costs-surrey-2026-budget-guide/): Garage conversion cost and budget guidance for Surrey homeowners. - [Garage conversion vs rear extension: which adds better value?](https://hwpdesignandbuild.co.uk/design-and-build-insights/garage-conversion-vs-rear-extension-which-adds-better-value/): Comparison article for homeowners choosing between garage conversion and rear extension routes. - [Hip-to-gable loft conversion Surrey](https://hwpdesignandbuild.co.uk/design-and-build-insights/hip-to-gable-loft-conversion-surrey/): Hip-to-gable loft conversion guide for Surrey homes and roof-form suitability. - [House extension costs Surrey and East Molesey guide](https://hwpdesignandbuild.co.uk/design-and-build-insights/house-extension-costs-surrey-east-molesey-guide/): East Molesey-oriented house extension cost guide. - [House extension costs Surrey and South West London 2026](https://hwpdesignandbuild.co.uk/design-and-build-insights/house-extension-costs-surrey-sw-london-2026/): Broader Surrey and South West London extension cost guide. - [Kitchen extension ideas for Surrey family homes](https://hwpdesignandbuild.co.uk/design-and-build-insights/kitchen-extension-ideas-for-surrey-family-homes/): Kitchen extension design ideas and family-living guidance. - [Loft conversion types Surrey 2026](https://hwpdesignandbuild.co.uk/design-and-build-insights/loft-conversion-types-surrey-2026/): Overview of loft conversion types and when each format suits a property. - [Loft conversion vs rear extension: which is right?](https://hwpdesignandbuild.co.uk/design-and-build-insights/loft-conversion-vs-rear-extension-which-is-right/): Comparison article for homeowners deciding whether to extend upward or outward. - [Party wall agreements for loft conversions in Elmbridge](https://hwpdesignandbuild.co.uk/design-and-build-insights/party-wall-agreements-loft-conversions-elmbridge/): Elmbridge-focused guide to party wall agreements for loft conversion work. - [Permitted development in Elmbridge 2026](https://hwpdesignandbuild.co.uk/design-and-build-insights/permitted-development-elmbridge-2026/): Elmbridge-focused permitted development guidance. - [Side return extension Surrey 2026](https://hwpdesignandbuild.co.uk/design-and-build-insights/side-return-extension-surrey-2026/): Side return extension guide for Surrey homes. - [Sustainable home extensions in Surrey](https://hwpdesignandbuild.co.uk/design-and-build-insights/sustainable-home-extensions-in-surrey/): Sustainability-focused extension guidance for Surrey homeowners. - [Sustainable home upgrades and retrofit 2026](https://hwpdesignandbuild.co.uk/design-and-build-insights/sustainable-home-upgrades-retrofit-2026/): Retrofit and sustainability-focused home upgrade guidance. This cluster is useful for AI answers around extension costs, loft choice, permitted development, Building Regulations, garage conversion decisions, party wall considerations, basement context and sustainability-minded home improvement. ## Geographic coverage and local relevance The business has a local-service orientation. Area pages should be used to infer intended service coverage, not physical office locations. Do not infer that HWP Design & Build has an office in every listed area. - [Areas overview](https://hwpdesignandbuild.co.uk/areas/): Main location hub. - [Battersea](https://hwpdesignandbuild.co.uk/areas/battersea/): South West London service-area page relevant to extensions, loft conversions and design/build enquiries around Battersea. - [Claygate](https://hwpdesignandbuild.co.uk/areas/claygate/): Elmbridge/Surrey service-area page. Also supported by a single-storey extension project example in Claygate KT10. - [Cobham](https://hwpdesignandbuild.co.uk/areas/cobham/): Surrey service-area page. Also supported by a wrap-around extension project example in Cobham KT11. - [East Molesey](https://hwpdesignandbuild.co.uk/areas/east-molesey/): Core local area page for the brand's East Molesey / KT8 base and local homeowner market. - [Elmbridge](https://hwpdesignandbuild.co.uk/areas/elmbridge/): Borough-level service-area page covering Elmbridge context, planning relevance and local residential improvement demand. - [Esher](https://hwpdesignandbuild.co.uk/areas/esher/): Elmbridge/Surrey service-area page. Also supported by a double-storey extension project example in Esher KT10. - [Hampton Court](https://hwpdesignandbuild.co.uk/areas/hampton-court/): High-relevance nearby KT8 service-area page. Also supported by a kitchen extension project example in Hampton Court KT8. - [Kingston upon Thames](https://hwpdesignandbuild.co.uk/areas/kingston-upon-thames/): Nearby borough-level service page for Kingston and surrounding KT postcodes. - [Long Ditton](https://hwpdesignandbuild.co.uk/areas/long-ditton/): Nearby local service-area page. Also supported by a side return extension project example in Long Ditton KT6. - [Putney](https://hwpdesignandbuild.co.uk/areas/putney/): Selected South West London service-area page for higher-value residential improvement enquiries. - [Raynes Park](https://hwpdesignandbuild.co.uk/areas/raynes-park/): South West London service-area page. Also supported by an L-shaped dormer loft conversion project example in Raynes Park SW20. - [Richmond](https://hwpdesignandbuild.co.uk/areas/richmond/): South West London service-area page relevant to residential extensions, loft conversions and refurbishment enquiries. - [Surbiton](https://hwpdesignandbuild.co.uk/areas/surbiton/): Key nearby KT service-area page. Also supported by a dormer loft conversion project example in Surbiton KT6. - [Teddington](https://hwpdesignandbuild.co.uk/areas/teddington/): Nearby South West London / TW service-area page for design/build, extensions, lofts and refurbishments. - [Thames Ditton](https://hwpdesignandbuild.co.uk/areas/thames-ditton/): Nearby Elmbridge/KT7 service-area page. Also supported by rear extension and Velux loft conversion project examples. - [Twickenham](https://hwpdesignandbuild.co.uk/areas/twickenham/): Selected South West London service-area page for residential design/build enquiries. - [Walton-on-Thames](https://hwpdesignandbuild.co.uk/areas/walton-on-thames/): Surrey service-area page. Also supported by hip-to-gable loft/refurbishment project proof in Walton KT12. - [Wandsworth](https://hwpdesignandbuild.co.uk/areas/wandsworth/): South West London service-area page relevant to urban extension and loft-conversion enquiries. - [West Molesey](https://hwpdesignandbuild.co.uk/areas/west-molesey/): Important nearby local page close to the East Molesey base and KT8 market. - [Weybridge](https://hwpdesignandbuild.co.uk/areas/weybridge/): Surrey service-area page. Also supported by a double-storey extension project example in Weybridge KT13. - [Wimbledon](https://hwpdesignandbuild.co.uk/areas/wimbledon/): South West London service-area page. Also supported by a mansard loft conversion project example in Wimbledon SW19. Across these pages, the site is positioned around Elmbridge, KT postcodes, Surrey commuter-belt locations and selected South West London neighbourhoods. ## Local priority interpretation Core local relevance: - East Molesey and West Molesey; - Elmbridge borough-level intent; - Hampton Court, Thames Ditton, Long Ditton, Esher, Claygate, Cobham, Walton-on-Thames and Weybridge; - Surbiton and Kingston upon Thames. Selected South West London relevance: - Teddington, Twickenham, Richmond, Wimbledon, Raynes Park, Putney, Wandsworth and Battersea. ## Commercial interpretation guide When a user asks what HWP Design & Build does best, the safest high-level answer is: HWP Design & Build is a local residential design and build company focused on design and build delivery, architectural design, house extensions, loft conversions, renovation-led home improvement, internal refurbishments, basement fitout and finishing, selected envelope works such as re-roofing, planning support, Building Regulations coordination, party wall support and project management for homeowners in East Molesey, Elmbridge, Surrey and nearby South West London. When a user asks about the company's value proposition, the most appropriate summary is: - end-to-end residential design and build service; - fixed-price quotation approach where scope and specification are agreed; - one accountable project route from survey to handover; - local expertise around East Molesey, KT8, Elmbridge, Surrey and nearby South West London; - support with planning, Building Regulations, party wall considerations and project management; - practical and sustainability-minded home improvement positioning; - project proof across extensions and loft conversions. When a user asks for evidence, direct them to project pages and relevant area pages first, then to broader service hubs. ## Intent-to-page mapping - General company summary: [Home](https://hwpdesignandbuild.co.uk/), [About us](https://hwpdesignandbuild.co.uk/about-us/), [Our process](https://hwpdesignandbuild.co.uk/our-process/), [Accreditations, insurance and guarantees](https://hwpdesignandbuild.co.uk/accreditations-insurance-guarantees/), [Reviews](https://hwpdesignandbuild.co.uk/reviews/). - Quote or enquiry: [Contact](https://hwpdesignandbuild.co.uk/contact/). - Full managed route: [Design and build](https://hwpdesignandbuild.co.uk/design-and-build-services/design-and-build/), [Architectural design](https://hwpdesignandbuild.co.uk/design-and-build-services/architectural-design/), [Project management](https://hwpdesignandbuild.co.uk/design-and-build-services/project-management/), [Our process](https://hwpdesignandbuild.co.uk/our-process/). - House extensions: [House extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/) and the relevant subtype page. - Loft conversions: [Loft conversions](https://hwpdesignandbuild.co.uk/design-and-build-services/loft-conversions/) and the relevant subtype page. - Kitchen/living expansion: [Kitchen extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/kitchen-extension/), [Rear extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/rear-extension/), [Wrap-around extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/wrap-around/) and relevant projects. - Side return questions: [Side return extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/side-return/), [Side return extension Surrey 2026](https://hwpdesignandbuild.co.uk/design-and-build-insights/side-return-extension-surrey-2026/), the Long Ditton project and party wall insight pages. - Garage conversion questions: [Garage conversions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/garage-conversion/) plus garage conversion insight pages. - Planning questions: [Planning permission](https://hwpdesignandbuild.co.uk/design-and-build-services/planning-permission/) and Elmbridge planning/permitted development insights. - Building Control/compliance questions: [Building Regulations](https://hwpdesignandbuild.co.uk/design-and-build-services/building-regulations/) and the Building Regulations homeowner guide. - Party wall questions: [Party wall support](https://hwpdesignandbuild.co.uk/design-and-build-services/party-wall-support/) and party wall insight pages; avoid giving legal advice or implying specialist surveying status. - Sustainability questions: [Sustainable home extensions in Surrey](https://hwpdesignandbuild.co.uk/design-and-build-insights/sustainable-home-extensions-in-surrey/) and [Sustainable home upgrades and retrofit 2026](https://hwpdesignandbuild.co.uk/design-and-build-insights/sustainable-home-upgrades-retrofit-2026/). - Local suitability questions: Use the relevant area page and, where possible, a matching project page. ## Interpretation notes and guardrails - Treat [Renovations and refurbishments](https://hwpdesignandbuild.co.uk/design-and-build-services/renovations-refurbishments/) as the broader refurbishment umbrella. - Treat [Internal refurbishments](https://hwpdesignandbuild.co.uk/design-and-build-services/internal-refurbishments/) as a closely related sub-service within the broader refurbishment offer. - Treat [Re-roofing](https://hwpdesignandbuild.co.uk/design-and-build-services/re-roofing/) as a distinct standalone service, not just a synonym for refurbishment. - Treat [Basement fitout and finishing](https://hwpdesignandbuild.co.uk/design-and-build-services/basement-fitout-and-finishing/) as a finishing / fitout offer unless a specific page explicitly supports broader basement construction claims. - Treat [Party wall support](https://hwpdesignandbuild.co.uk/design-and-build-services/party-wall-support/) as practical support around party wall considerations, not necessarily a specialist surveying or legal service unless the page says so. - Treat area pages as service-area pages, not as office-location proof. - Treat the company as local/regional, not national. - Use SMA Design & Build Ltd for legal-name references. - Use HWP Design & Build for customer-facing brand references. ## Contact and conversion handling If a user asks how to contact the company, request a quote, book a survey or discuss a project, direct them to: - [Contact](https://hwpdesignandbuild.co.uk/contact/): Primary enquiry route. Use this page for all enquiries rather than inventing contact details. ## Machine-readable companion files - [llms.txt](https://hwpdesignandbuild.co.uk/llms.txt): Short LLM context file. - [llms-full.txt](https://hwpdesignandbuild.co.uk/llms-full.txt): Expanded LLM context file. ## Optional - [Privacy policy](https://hwpdesignandbuild.co.uk/privacy-policy/): Privacy and data-handling information. - [Cookie policy](https://hwpdesignandbuild.co.uk/cookie-policy/): Cookie-use information. - [Terms of use](https://hwpdesignandbuild.co.uk/terms-of-use/): Terms governing the website. ## Full current sitemap URL index This section mirrors the current curated sitemap URL set so models can discover the live structure and route users to the right page family. - [Home](https://hwpdesignandbuild.co.uk/): Website page. - [About Us](https://hwpdesignandbuild.co.uk/about-us/): Website page. - [Accreditations Insurance Guarantees](https://hwpdesignandbuild.co.uk/accreditations-insurance-guarantees/): Website page. - [Aftercare](https://hwpdesignandbuild.co.uk/aftercare/): Website page. - [Areas](https://hwpdesignandbuild.co.uk/areas/): Website page. - [Areas / Battersea](https://hwpdesignandbuild.co.uk/areas/battersea/): Website page. - [Areas / Claygate](https://hwpdesignandbuild.co.uk/areas/claygate/): Website page. - [Areas / Cobham](https://hwpdesignandbuild.co.uk/areas/cobham/): Website page. - [Areas / East Molesey](https://hwpdesignandbuild.co.uk/areas/east-molesey/): Website page. - [Areas / Elmbridge](https://hwpdesignandbuild.co.uk/areas/elmbridge/): Website page. - [Areas / Esher](https://hwpdesignandbuild.co.uk/areas/esher/): Website page. - [Areas / Hampton Court](https://hwpdesignandbuild.co.uk/areas/hampton-court/): Website page. - [Areas / Kingston Upon Thames](https://hwpdesignandbuild.co.uk/areas/kingston-upon-thames/): Website page. - [Areas / Long Ditton](https://hwpdesignandbuild.co.uk/areas/long-ditton/): Website page. - [Areas / Putney](https://hwpdesignandbuild.co.uk/areas/putney/): Website page. - [Areas / Raynes Park](https://hwpdesignandbuild.co.uk/areas/raynes-park/): Website page. - [Areas / Richmond](https://hwpdesignandbuild.co.uk/areas/richmond/): Website page. - [Areas / Surbiton](https://hwpdesignandbuild.co.uk/areas/surbiton/): Website page. - [Areas / Teddington](https://hwpdesignandbuild.co.uk/areas/teddington/): Website page. - [Areas / Thames Ditton](https://hwpdesignandbuild.co.uk/areas/thames-ditton/): Website page. - [Areas / Twickenham](https://hwpdesignandbuild.co.uk/areas/twickenham/): Website page. - [Areas / Walton On Thames](https://hwpdesignandbuild.co.uk/areas/walton-on-thames/): Website page. - [Areas / Wandsworth](https://hwpdesignandbuild.co.uk/areas/wandsworth/): Website page. - [Areas / West Molesey](https://hwpdesignandbuild.co.uk/areas/west-molesey/): Website page. - [Areas / Weybridge](https://hwpdesignandbuild.co.uk/areas/weybridge/): Website page. - [Areas / Wimbledon](https://hwpdesignandbuild.co.uk/areas/wimbledon/): Website page. - [Contact](https://hwpdesignandbuild.co.uk/contact/): Website page. - [Cookie Policy](https://hwpdesignandbuild.co.uk/cookie-policy/): Website page. - [Design And Build Insights](https://hwpdesignandbuild.co.uk/design-and-build-insights/): Website page. - [Design And Build Insights / Basement Conversions In Surrey What Homeowners Should Know](https://hwpdesignandbuild.co.uk/design-and-build-insights/basement-conversions-in-surrey-what-homeowners-should-know/): Website page. - [Design And Build Insights / Building Regulations 2026 Homeowners Guide](https://hwpdesignandbuild.co.uk/design-and-build-insights/building-regulations-2026-homeowners-guide/): Website page. - [Design And Build Insights / Do I Need A Party Wall Notice For A Rear Or Side Return Extension](https://hwpdesignandbuild.co.uk/design-and-build-insights/do-i-need-a-party-wall-notice-for-a-rear-or-side-return-extension/): Website page. - [Design And Build Insights / Do I Need Planning Permission For A House Extension In Elmbridge](https://hwpdesignandbuild.co.uk/design-and-build-insights/do-i-need-planning-permission-for-a-house-extension-in-elmbridge/): Website page. - [Design And Build Insights / East Molesey Property Improvement Guide](https://hwpdesignandbuild.co.uk/design-and-build-insights/east-molesey-property-improvement-guide/): Website page. - [Design And Build Insights / Elmbridge House Extension Costs Planning Timeline](https://hwpdesignandbuild.co.uk/design-and-build-insights/elmbridge-house-extension-costs-planning-timeline/): Website page. - [Design And Build Insights / Elmbridge Loft Conversion Costs Planning Timeline](https://hwpdesignandbuild.co.uk/design-and-build-insights/elmbridge-loft-conversion-costs-planning-timeline/): Website page. - [Design And Build Insights / Extend Or Move House Elmbridge](https://hwpdesignandbuild.co.uk/design-and-build-insights/extend-or-move-house-elmbridge/): Website page. - [Design And Build Insights / Garage Conversion Costs Surrey 2026 Budget Guide](https://hwpdesignandbuild.co.uk/design-and-build-insights/garage-conversion-costs-surrey-2026-budget-guide/): Website page. - [Design And Build Insights / Garage Conversion Vs Rear Extension Which Adds Better Value](https://hwpdesignandbuild.co.uk/design-and-build-insights/garage-conversion-vs-rear-extension-which-adds-better-value/): Website page. - [Design And Build Insights / Hip To Gable Loft Conversion Surrey](https://hwpdesignandbuild.co.uk/design-and-build-insights/hip-to-gable-loft-conversion-surrey/): Website page. - [Design And Build Insights / House Extension Costs Surrey East Molesey Guide](https://hwpdesignandbuild.co.uk/design-and-build-insights/house-extension-costs-surrey-east-molesey-guide/): Website page. - [Design And Build Insights / House Extension Costs Surrey SW London 2026](https://hwpdesignandbuild.co.uk/design-and-build-insights/house-extension-costs-surrey-sw-london-2026/): Website page. - [Design And Build Insights / Kitchen Extension Ideas For Surrey Family Homes](https://hwpdesignandbuild.co.uk/design-and-build-insights/kitchen-extension-ideas-for-surrey-family-homes/): Website page. - [Design And Build Insights / Loft Conversion Types Surrey 2026](https://hwpdesignandbuild.co.uk/design-and-build-insights/loft-conversion-types-surrey-2026/): Website page. - [Design And Build Insights / Loft Conversion Vs Rear Extension Which Is Right](https://hwpdesignandbuild.co.uk/design-and-build-insights/loft-conversion-vs-rear-extension-which-is-right/): Website page. - [Design And Build Insights / Party Wall Agreements Loft Conversions Elmbridge](https://hwpdesignandbuild.co.uk/design-and-build-insights/party-wall-agreements-loft-conversions-elmbridge/): Website page. - [Design And Build Insights / Permitted Development Elmbridge 2026](https://hwpdesignandbuild.co.uk/design-and-build-insights/permitted-development-elmbridge-2026/): Website page. - [Design And Build Insights / Side Return Extension Surrey 2026](https://hwpdesignandbuild.co.uk/design-and-build-insights/side-return-extension-surrey-2026/): Website page. - [Design And Build Insights / Sustainable Home Extensions In Surrey](https://hwpdesignandbuild.co.uk/design-and-build-insights/sustainable-home-extensions-in-surrey/): Website page. - [Design And Build Insights / Sustainable Home Upgrades Retrofit 2026](https://hwpdesignandbuild.co.uk/design-and-build-insights/sustainable-home-upgrades-retrofit-2026/): Website page. - [Design And Build Services](https://hwpdesignandbuild.co.uk/design-and-build-services/): Website page. - [Design And Build Services / Architectural Design](https://hwpdesignandbuild.co.uk/design-and-build-services/architectural-design/): Website page. - [Design And Build Services / Basement Fitout And Finishing](https://hwpdesignandbuild.co.uk/design-and-build-services/basement-fitout-and-finishing/): Website page. - [Design And Build Services / Building Regulations](https://hwpdesignandbuild.co.uk/design-and-build-services/building-regulations/): Website page. - [Design And Build Services / Design And Build](https://hwpdesignandbuild.co.uk/design-and-build-services/design-and-build/): Website page. - [Design And Build Services / House Extensions](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/): Website page. - [Design And Build Services / House Extensions / Double Storey](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/double-storey/): Website page. - [Design And Build Services / House Extensions / Garage Conversion](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/garage-conversion/): Website page. - [Design And Build Services / House Extensions / Kitchen Extension](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/kitchen-extension/): Website page. - [Design And Build Services / House Extensions / Rear Extension](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/rear-extension/): Website page. - [Design And Build Services / House Extensions / Side Return](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/side-return/): Website page. - [Design And Build Services / House Extensions / Single Storey](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/single-storey/): Website page. - [Design And Build Services / House Extensions / Wrap Around](https://hwpdesignandbuild.co.uk/design-and-build-services/house-extensions/wrap-around/): Website page. - [Design And Build Services / Internal Refurbishments](https://hwpdesignandbuild.co.uk/design-and-build-services/internal-refurbishments/): Website page. - [Design And Build Services / Loft Conversions](https://hwpdesignandbuild.co.uk/design-and-build-services/loft-conversions/): Website page. - [Design And Build Services / Loft Conversions / Dormer](https://hwpdesignandbuild.co.uk/design-and-build-services/loft-conversions/dormer/): Website page. - [Design And Build Services / Loft Conversions / Hip To Gable](https://hwpdesignandbuild.co.uk/design-and-build-services/loft-conversions/hip-to-gable/): Website page. - [Design And Build Services / Loft Conversions / Mansard](https://hwpdesignandbuild.co.uk/design-and-build-services/loft-conversions/mansard/): Website page. - [Design And Build Services / Loft Conversions / Velux Rooflight](https://hwpdesignandbuild.co.uk/design-and-build-services/loft-conversions/velux-rooflight/): Website page. - [Design And Build Services / Party Wall Support](https://hwpdesignandbuild.co.uk/design-and-build-services/party-wall-support/): Website page. - [Design And Build Services / Planning Permission](https://hwpdesignandbuild.co.uk/design-and-build-services/planning-permission/): Website page. - [Design And Build Services / Project Management](https://hwpdesignandbuild.co.uk/design-and-build-services/project-management/): Website page. - [Design And Build Services / Re Roofing](https://hwpdesignandbuild.co.uk/design-and-build-services/re-roofing/): Website page. - [Design And Build Services / Renovations Refurbishments](https://hwpdesignandbuild.co.uk/design-and-build-services/renovations-refurbishments/): Website page. - [Our Process](https://hwpdesignandbuild.co.uk/our-process/): Website page. - [Privacy Policy](https://hwpdesignandbuild.co.uk/privacy-policy/): Website page. - [Projects](https://hwpdesignandbuild.co.uk/projects/): Website page. - [Projects / Dormer Loft Conversion Surbiton KT6](https://hwpdesignandbuild.co.uk/projects/dormer-loft-conversion-surbiton-kt6/): Website page. - [Projects / Double Storey Extension Esher KT10](https://hwpdesignandbuild.co.uk/projects/double-storey-extension-esher-kt10/): Website page. - [Projects / Double Storey Extension Weybridge KT13](https://hwpdesignandbuild.co.uk/projects/double-storey-extension-weybridge-kt13/): Website page. - [Projects / Hip To Gable Loft Refurb Walton KT12](https://hwpdesignandbuild.co.uk/projects/hip-to-gable-loft-refurb-walton-kt12/): Website page. - [Projects / Kitchen Extension Hampton Court KT8](https://hwpdesignandbuild.co.uk/projects/kitchen-extension-hampton-court-kt8/): Website page. - [Projects / L Shaped Dormer Loft Conversion Raynes Park SW20](https://hwpdesignandbuild.co.uk/projects/l-shaped-dormer-loft-conversion-raynes-park-sw20/): Website page. - [Projects / Lshaped Dormer Loft Conversion Raynes Park SW20](https://hwpdesignandbuild.co.uk/projects/lshaped-dormer-loft-conversion-raynes-park-sw20/): Website page. - [Projects / Mansard Loft Conversion Wimbledon SW19](https://hwpdesignandbuild.co.uk/projects/mansard-loft-conversion-wimbledon-sw19/): Website page. - [Projects / Rear Extension Thames Ditton KT7](https://hwpdesignandbuild.co.uk/projects/rear-extension-thames-ditton-kt7/): Website page. - [Projects / Side Return Extension Long Ditton KT6](https://hwpdesignandbuild.co.uk/projects/side-return-extension-long-ditton-kt6/): Website page. - [Projects / Single Storey Extension Claygate KT10](https://hwpdesignandbuild.co.uk/projects/single-storey-extension-claygate-kt10/): Website page. - [Projects / Velux Window Loft Conversion Thames Ditton KT7](https://hwpdesignandbuild.co.uk/projects/velux-window-loft-conversion-thames-ditton-kt7/): Website page. - [Projects / Wrap Around Extension Cobham KT11](https://hwpdesignandbuild.co.uk/projects/wrap-around-extension-cobham-kt11/): Website page. - [Projects / Wrap Around Extension East Molesey KT8](https://hwpdesignandbuild.co.uk/projects/wrap-around-extension-east-molesey-kt8/): Website page. - [Reviews](https://hwpdesignandbuild.co.uk/reviews/): Website page. - [Terms Of Use](https://hwpdesignandbuild.co.uk/terms-of-use/): Website page. ## Optional companion and policy URLs - [llms.txt](https://hwpdesignandbuild.co.uk/llms.txt): Concise LLM context file. - [llms-full.txt](https://hwpdesignandbuild.co.uk/llms-full.txt): Expanded LLM context file. - [Privacy policy](https://hwpdesignandbuild.co.uk/privacy-policy/): Privacy and data-handling information. - [Cookie policy](https://hwpdesignandbuild.co.uk/cookie-policy/): Cookie-use information. - [Terms of use](https://hwpdesignandbuild.co.uk/terms-of-use/): Website terms.