Wandsworth families extend rather than move — and the kitchen extension is what they want. TrustBuilt Projects builds side-return, rear and wrap-around extensions across Wandsworth Town, Earlsfield and Balham (SW18, SW12, SW17), all managed by us.
Wandsworth's 'Nappy Valley' terraces were built for growing families, and the way owners create space today is the side-return or rear extension — opening the cramped Victorian ground floor into a bright open-plan kitchen-diner that runs out to the garden. It's comfortably our most-requested job across SW18 and SW12.
Most single-storey side-return and rear extensions fall under permitted development, but the Wandsworth Common, Magdalen Park and Heaver Estate conservation areas tighten what's allowed, and wrap-arounds usually need full planning. We confirm the route for your street before pricing anything.
Plenty of Wandsworth owners pair the extension with a loft conversion so the whole house is upgraded in one programme. We can quote and sequence both together — one team, one set of scaffolding, one disruption period.
Wandsworth extension costs track the wider South West London market; size, glazing and kitchen specification are the main variables. Typical ranges:
| Project type | Typical cost | Timeline |
|---|---|---|
| Side-return extension | £55,000 – £85,000 | 12–18 weeks |
| Rear extension (single-storey) | £50,000 – £80,000 | 12–16 weeks |
| Wrap-around extension | £80,000 – £130,000 | 16–24 weeks |
| Double-storey extension | £95,000 – £160,000 | 20–28 weeks |
Every project is quoted in writing after a free site visit — these ranges are a guide only.
For most Wandsworth families the maths favours extending — a well-built side-return kitchen extension adds living space and value while keeping you in the catchment and avoiding stamp duty on a bigger house. We'll give you an honest view of what your property can gain at the free site visit.
Yes, and it's a common Wandsworth request. Combining them means one programme, one set of scaffolding and a single disruption period rather than two. We quote them together and sequence the works to keep the house liveable as long as possible.
Many single-storey side-return and rear extensions are permitted development, but the Wandsworth Common, Magdalen Park and Heaver Estate conservation areas restrict this, and wrap-arounds usually need full planning. We confirm your address's status before pricing.
A single-storey side-return or rear extension typically runs 12–18 weeks; wrap-around and double-storey extensions take longer. We share a full timeline with the written quote.
Free site visit, no obligation, written quote.
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