House extensions & lofts in Mortlake SW14
Victorian terraces between Barnes and Kew respond well to side-return kitchens and rear dormers — we design and build both across SW14, where our portfolio already includes eight completed East Sheen projects a few streets away. Fixed price, planning handled.
- Postcode SW14
- Borough Richmond upon Thames
- Service Design & build
- Free quote 2 min online
What we deliver in Mortlake
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 rear extensions turn Mortlake's narrow Victorian kitchens into open-plan family rooms. We design and build them in-house, handling planning where needed.
Loft conversions add a master bedroom and en-suite to Mortlake's terraces — extra space without losing the garden.
New-build plots are scarce in Mortlake, but we take on replacement dwellings and infill where they arise.
SERVICE 01 House extensions in Mortlake
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 Mortlake
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 Mortlake
Ground-up homes on infill plots, demolition-and-rebuild, and small multi-unit schemes.
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Common Mortlake questions
Things you might need to know about building in Mortlake.
Do I need planning permission for an extension in Mortlake?
Many extensions in Mortlake fall under permitted development. Where a full application is needed, it goes to Richmond upon Thames 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 Mortlake 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 Mortlake?
Several streets in Richmond upon Thames 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 Mortlake?
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 Richmond upon Thames neighbourhoods
We deliver projects across the borough — same team, same pricing, same fixed-price contract.
Ready to start your Mortlake project?
Get an instant estimate in 2 minutes — no callbacks, no commitment. Or talk to a real person on 0800 0432 333.