- Location :KT10 (Esher)
- Project Type :Double Storey Extension
- Duration :6 Months
- Completion :11/05/2025
- Local Authority :Elmbridge Borough Council
Double Storey Extension in Esher KT10
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A larger kitchen-diner and new bedroom above for a growing family in Esher
This family home in Esher KT10 needed more living space downstairs and an additional bedroom upstairs. Rather than extending on one level only, the homeowners wanted a more efficient solution that could add value across both floors while keeping the overall design balanced with the original property.
We delivered a double storey extension that expanded the ground-floor kitchen-diner and created a bright new bedroom above. The project was designed around family life, with better circulation, improved natural light, structural coordination and a finish that felt consistent with the existing house.
Esher sits within Elmbridge, where extensions need careful thought around design quality, neighbour amenity, rooflines, boundary distances and local character. For this KT10 project, the extension had to deliver meaningful extra space while remaining proportionate to the original home and surrounding street scene.
HWP coordinated the route from early feasibility and planning permission through to structural works, inspections and Building Regulations sign-off. Day-to-day sequencing, trade coordination and quality control were managed through our project management process.
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Why a double storey extension worked for this KT10 property
A single storey extension would have improved the kitchen and family space, but it would not have solved the upstairs bedroom requirement. A double storey extension used the same general rear footprint more efficiently, creating useful space on two floors while avoiding a larger spread across the garden.
The design focused on balance. Downstairs, the goal was a brighter kitchen-diner with improved circulation and a better relationship to the garden. Upstairs, the new bedroom needed to feel like part of the original first-floor layout, with comfortable proportions, natural light and a sensible connection to the existing landing.
In Esher, where many homes have strong resale appeal and established street character, the extension also needed to look considered from the outside. Roof pitch, eaves, brickwork, window positions and materials were reviewed so the addition read as a natural continuation rather than an obvious bolt-on.
Local double storey extension considerations in Esher
Esher extensions need to balance extra space with local planning expectations, neighbouring amenity and the premium character of KT10 housing. Elmbridge guidance places strong emphasis on sympathetic design, matching materials, window proportions, roof form and avoiding extensions that dominate the original property or neighbouring homes.
| Local factor | Why it mattered | How the project responded |
|---|---|---|
| Elmbridge planning context | Double storey extensions can have a greater impact on neighbours and street character than single storey extensions. | The planning route, massing, roof form and neighbour relationship were reviewed before works progressed. |
| Rear projection and boundary distance | More-than-one-storey extensions have stricter limits and can affect outlook, privacy and daylight. | The extension depth, height, side windows and relationship to rear boundaries were assessed early. |
| Matching the original property | Esher homes often rely on proportion, materials and roof detail to preserve value and character. | Brickwork, roofline, window style, lintel alignment and eaves details were coordinated with the existing house. |
| Neighbour amenity | Upper-floor extensions can raise privacy, overlooking, overshadowing and overbearing concerns. | Window positions, side glazing, massing and construction sequencing were reviewed to reduce avoidable impact. |
| Conservation sensitivity | Parts of Esher include conservation-sensitive settings where design quality and visual impact matter more. | The design was kept proportionate and sympathetic, with local constraints checked before confirming the route. |
| Family living during works | Large extensions can disrupt kitchens, services, access and upstairs rooms. | The programme was staged to manage access, temporary protection, safety and communication throughout the build. |
Planning and feasibility checks for the Esher extension
The early feasibility stage helped avoid the most common problems with double storey extensions: underestimating the planning route, misjudging the effect on neighbours, or designing a first-floor addition that does not sit comfortably with the original house.
| Feasibility item | Risk if missed | Project response |
|---|---|---|
| Planning route | The project could be delayed if permitted development assumptions are wrong. | Householder planning requirements, previous extensions and local constraints were reviewed at the start. |
| Roof pitch and eaves line | A poorly integrated roof can make the extension look heavy or out of character. | The new roof was coordinated with existing pitch, ridge relationship and eaves detailing. |
| Structural openings | Large openings between old and new spaces need safe load transfer and proper support. | Steelwork, bearing points and padstone requirements were coordinated with the structural design. |
| Foundations and drainage | Ground conditions, nearby drainage and existing services can affect programme and cost. | Foundation design, drainage routes and below-ground works were planned before the main build progressed. |
| Upper-floor privacy | Bedroom windows can create overlooking issues if side or rear views are not considered. | Window placement, glazing strategy and room layout were reviewed against neighbouring properties. |
| Internal circulation | The extension can add floor area but still feel awkward if the old and new rooms do not connect well. | The ground-floor kitchen-diner and first-floor bedroom were planned around circulation, light and furniture use. |
Cost and scope context for Esher homeowners
A double storey extension is usually more cost-effective per square metre than building two separate projects, but it is still a major structural and finishing programme. Accurate pricing depends on design, foundations, drainage, steelwork, roof integration, glazing, kitchen specification, bathroom or bedroom finishes, heating upgrades, electrical work and the level of disruption management required.
| Scope item | Typical impact on budget | Project note |
|---|---|---|
| Foundations and groundworks | Major cost driver | Depth, soil conditions, drainage, access and proximity to boundaries can all affect cost. |
| Structural steel and openings | Major cost driver | Large kitchen-diner openings require careful load transfer and Building Regulations coordination. |
| Roof integration | Medium to major cost driver | Matching the existing roof pitch, eaves and tiles improves the finished appearance. |
| Kitchen-diner specification | Specification-dependent | Cabinetry, worktops, lighting, flooring, glazing and heating choices can significantly affect budget. |
| Bedroom and first-floor finishes | Medium cost driver | Flooring, electrics, heating, decoration and joinery were coordinated with the existing first floor. |
| Building Regulations and inspections | Essential compliance cost | Structure, insulation, drainage, fire safety, ventilation and electrical work needed coordinated sign-off. |
For homeowners deciding between moving and improving, a well-planned double storey extension can be especially appealing in Esher because it can add space, improve family living and increase bedroom count while keeping the household in a desirable KT10 location. Our Elmbridge house extension cost, planning and timeline guide explains wider budget and approval considerations in more detail.
Conclusion
This double storey extension delivered meaningful extra space on both floors, with a layout designed around family life. The new kitchen-diner improved the ground floor, while the additional bedroom above made the upper floor more practical for a growing household.
By coordinating planning, structure, roof integration, services and finishes as one programme, the extension now feels balanced, brighter and more useful, while reading as a natural continuation of the original Esher property.
Double storey extension expertise. Elmbridge planning insight. Fixed-price clarity.
Planning a double storey extension in Esher?
Tell us about your extension plans and we’ll review the planning route, boundary position, neighbour impact, structural requirements, drainage, Building Regulations and best layout for your KT10 property.
Serving Esher, Claygate, Cobham, East Molesey, Thames Ditton, Weybridge, Elmbridge and nearby Surrey and South West London areas.
Double Storey Extension Esher FAQs
Often, yes. Double storey extensions have tighter planning limits than many single storey extensions, especially where the proposal affects the side of the property, sits close to boundaries, changes the roof form or affects neighbouring amenity. We review the planning route early through our planning permission support.
Esher is within Elmbridge, so householder planning matters are normally handled by Elmbridge Borough Council. We consider Elmbridge design guidance, local character, neighbouring properties, conservation context and previous extensions before confirming the best route.
The family needed more space on both floors: a larger kitchen-diner at ground level and an additional bedroom above. A double storey extension made better use of the same rear footprint than a single storey extension, while keeping the garden loss more controlled.
Sometimes, but the rules are restrictive and address-specific. More-than-one-storey rear extensions must meet strict limits on depth, boundary distance, height, roof pitch and upper-floor side windows. Side extensions of more than one storey normally require householder planning permission.
Esher has a premium Surrey housing market with a mix of detached, semi-detached, period and modernised family homes. Extensions usually need to be carefully proportioned, with rooflines, windows, brickwork, materials and privacy designed so the new work feels sympathetic to the original property and surrounding street.
Yes, Esher includes conservation-sensitive areas, particularly around its historic core. If a property sits within or near a conservation area, extension design may need closer attention to scale, roof form, materials, window proportions and the relationship with the original building.
A double storey extension needs Building Regulations approval. We coordinate foundations, drainage, structural openings, steelwork, insulation, ventilation, fire safety, electrical work and inspections through our Building Regulations support.
Yes. On this project, the extension was designed around the existing roofline, proportions, materials and window rhythm so it felt like a natural continuation of the home rather than a disconnected addition.
They can. Party wall notices may be needed where foundations, excavation, structural work or walls are close to neighbouring properties. We can help coordinate this through our party wall support service.
Yes. We manage the programme, trades, inspections, sequencing, communication and handover through our project management service, giving homeowners one accountable route from planning through to completion.
Related services and local pages
Explore more about our house extension services, double storey extensions, rear extensions, kitchen extensions, design and build service, planning permission support, party wall support, Building Regulations coordination and design and build services in Esher.