House extensions & lofts in Balham SW12
Kitchen extensions and loft conversions for Balham's family-sized Victorian terraces — the same side-return and dormer playbook we've built minutes away in Clapham and Wandsworth. One in-house team from drawings to building control, at a fixed itemised price.
- Postcode SW12
- Borough Wandsworth
- Service Design & build
- Free quote 2 min online
What we deliver in Balham
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.
Rear extensions with French doors and rooflights create open kitchen-diner spaces; two-storey extensions add bedrooms.
Mansard and dormer conversions respect the proportions of Victorian terraces and deliver generous new rooms.
Occasionally we develop modern homes on side plots; design always reflects the local streetscape.
SERVICE 01 House extensions in Balham
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 Balham
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 Balham
Ground-up homes on infill plots, demolition-and-rebuild, and small multi-unit schemes.
View serviceRecent work near Balham
Balham projects include a two-bedroom loft conversion and a two-storey rear extension with a first-floor terrace.
Common Balham questions
Things you might need to know about building in Balham.
Do I need planning permission for an extension in Balham?
Many extensions in Balham fall under permitted development. Where a full application is needed, it goes to Wandsworth 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 Balham 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 Balham?
Several streets in Wandsworth 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 Balham?
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 Balham project?
Get an instant estimate in 2 minutes — no callbacks, no commitment. Or talk to a real person on 0800 0432 333.