Design & Build Advice for Extensions & Loft Conversions
- 30 years experience
- 10-year structural guarantee
- Fixed fee quotation
- 5% Scheduling discount
- 500+ Successful projects
INSIGHTS & ADVICE
Practical guidance on planning, costs and the build process—written for homeowners across Elmbridge, Surrey and South West London.
HWP Insights is your hub for straight-talking guidance on improving and expanding homes in and around Elmbridge. From early-stage planning and Building Regulations to design details and build quality, our articles cover extensions, loft conversions and real-world lessons from delivered projects — helping you plan confidently and avoid costly surprises.
Ready to talk about your project?
Insights FAQ's
HWP Insights is our blog hub for practical guidance on design & build, extensions, loft conversions and refurbishments—covering planning, budgeting and build considerations to help you make confident decisions.
We focus on the questions homeowners ask most: layouts, timelines, costs, common pitfalls and options for house extensions and loft conversions.
Yes. Many articles explain the difference between permitted development and full applications, and what to expect from the approvals journey. For project-specific help, see planning permission.
Figures in articles are guidance only—every home and brief is different. If you want accurate costs for your property and scope, the fastest route is to get a quote.
Usually, yes. We’re based in East Molesey and cover a wide 20-mile radius across Elmbridge, Surrey and SW London. Check your location on our areas we cover page.
Visit our projects page for completed extensions, loft conversions and refurbishments, including the kind of finishes and layouts we deliver.