House extensions & lofts in Walton-on-Thames
Walton's mix of period houses and suburban semis on wider plots suits everything from rear kitchens to double-storey extensions. One in-house team — architects, project manager, builders — covers KT12, with completed Surrey work from Claygate to Weybridge.
- Postcode KT12
- County Surrey
- Service Design & build
- Free quote 2 min online
What we deliver in Walton-on-Thames
Every street sits differently — a period terrace, a post-war semi, a modern infill. We shape the recommendation around your actual house, its planning context and how you want to live.
From side-return kitchen extensions on terraces to large double-storey additions on detached homes, Walton's varied housing suits a wide range of extension projects.
Loft conversions add bedrooms and en-suites across Walton's semis and detached houses — a cost-effective way to upsize in place.
Walton's larger plots make replacement dwellings and new-builds viable, which we deliver end-to-end with one in-house team.
SERVICE 01 House extensions in Walton-on-Thames
Single-storey, double-storey, side-return and wrap-around extensions — designed, planned and built by one in-house team.
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SERVICE 02 Loft conversions in Walton-on-Thames
Dormer, mansard, hip-to-gable and L-shape lofts — full-height ceilings, proper staircases, en-suites.
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SERVICE 03 New builds in Walton-on-Thames
Ground-up homes on infill plots, demolition-and-rebuild, and small multi-unit schemes.
View serviceRecent work near Walton-on-Thames
Common Walton-on-Thames questions
Things you might need to know about building in Walton-on-Thames.
Do I need planning permission for an extension in Walton-on-Thames?
Many extensions in Walton-on-Thames fall under permitted development. Where a full application is needed, it goes to Elmbridge Borough Council — we assess your property type, the council's restrictions and any conservation status on the first visit, and handle the application ourselves.
How long does a project in Walton-on-Thames typically take?
From first consultation to handover: 6–9 months for a single-storey extension or loft, 9–14 months for double-storey or wrap-around. We give you a tighter estimate after the survey.
Are there conservation areas in Walton-on-Thames?
Several streets in Elmbridge Borough Council's area fall within conservation areas that restrict materials and detailing. We check your exact address against the register on the first visit, and we have approved schemes in conservation areas nearby.
What is a typical extension cost in Walton-on-Thames?
Build cost in this part of Surrey runs £2,500–£4,000 per square metre for a finished extension including kitchen and finishes. Our calculator gives a personalised estimate.
Other Surrey neighbourhoods
We deliver projects across the borough — same team, same pricing, same fixed-price contract.
Ready to start your Walton-on-Thames project?
Get an instant estimate in 2 minutes — no callbacks, no commitment. Or talk to a real person on 0800 0432 333.