House extensions & lofts in Clapham
Clapham's long Victorian terraces around the Common are textbook side-return territory — we turn narrow kitchens into full-width family rooms under glazed roofs. Browse our completed Clapham extension below, then get a fixed itemised quote after a free site visit.
- Postcode SW4
- Borough Wandsworth
- Projects 1
- Free quote 2 min online
What we deliver in Clapham
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.
Side-return and wrap-around extensions open up narrow terraces; matched brickwork and zinc roofs satisfy conservation officers.
Dormer and L-shaped conversions are popular; mansard conversions are possible where height restrictions permit.
On corner plots and infill sites we design low-energy family homes that respect the street pattern.
SERVICE 01 House extensions in Clapham
Single-storey, double-storey, side-return and wrap-around extensions — designed, planned and built by one in-house team.
View service
SERVICE 02 Loft conversions in Clapham
Dormer, mansard, hip-to-gable and L-shape lofts — full-height ceilings, proper staircases, en-suites.
View service
SERVICE 03 New builds in Clapham
Ground-up homes on infill plots, demolition-and-rebuild, and small multi-unit schemes.
View serviceRecent work in Clapham
Clapham projects include several side-return extensions around the Common and a dormer conversion with sliding roof windows.
Common Clapham questions
Things you might need to know about building in Clapham.
Do I need planning permission for an extension in Clapham?
Many extensions in Clapham fall under permitted development. Where a full application is needed, it goes to your local 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 Clapham 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 Clapham?
Several streets in the Wandsworth 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 Clapham?
Build cost in this part of London runs £2,500–£4,000 per square metre for a finished extension including kitchen and finishes. Our calculator gives a personalised estimate.
Other Wandsworth neighbourhoods
We deliver projects across the borough — same team, same pricing, same fixed-price contract.
Ready to start your Clapham project?
Get an instant estimate in 2 minutes — no callbacks, no commitment. Or talk to a real person on 0800 0432 333.