House extension cost
in East Putney.
East Putney — the SW15 streets between Putney High Street and Wandsworth. Edwardian terraces dominate, with strong family-housing demand pushing loft conversions on almost every block.
What makes extension work in East Putney distinct.
Housing: Edwardian three-storey terraces with deep outriggers and steep pitched roofs.
Planning: Most of East Putney sits outside conservation designations, so PD rights are usually intact for rear dormers within volume limits.
Applications go to LB Wandsworth. We submit on your behalf and handle party wall awards, build-over agreements and conservation officer correspondence end-to-end.
The five extension types — SW15 numbers.
All figures inclusive of design, planning, build, contingency and VAT. The East Putney multiplier (0.96×) reflects local labour, scaffolding logistics, conservation requirements and finish expectations.
The 2026 London Extension Cost Guide.
Borough-by-borough pricing, a full £200k cost breakdown, PD vs full planning explained, and the seven hidden costs to watch for in East Putney and beyond.
Send me the guide.
What East Putney homeowners ask us.
How much does a house extension cost in East Putney in 2026?
Typical 2026 East Putney ranges (inc. design, planning, build, contingency & VAT): side-return extensions £86k–£154k; single-storey rear £106k–£202k; wraparound £163k–£307k; double-storey rear £173k–£365k; basement £240k–£720k. The East Putney multiplier (0.96×) reflects local labour rates, scaffold logistics and finish expectations.
Do I need planning permission for an extension in East Putney?
Most of East Putney sits outside conservation designations, so PD rights are usually intact for rear dormers within volume limits. Outside conservation areas, single-storey rear extensions up to 3m (terrace/semi) or 4m (detached) usually qualify for permitted development. Side-returns, wraparounds, double-storey extensions and anything in a conservation area need full planning. Applications go to LB Wandsworth.
What extension type works best for East Putney houses?
Edwardian three-storey terraces with deep outriggers and steep pitched roofs. On this housing stock, the most common 2VP extension is a single-storey rear or wraparound — adding 20–35 m² of open-plan kitchen-diner. Double-storey extensions become viable on properties with rear gardens deep enough to absorb the additional volume without overshadowing.
How long does an extension take in East Putney?
Allow 8–12 weeks for design and planning (longer in conservation areas), then 16–22 weeks on site for a single-storey, 22–30 weeks for a wraparound or double-storey, and 28–40 weeks for a basement. LB Wandsworth processes planning applications in approximately 8–13 weeks depending on backlog.
What hidden costs catch East Putney homeowners out on extensions?
In SW15 the top items are: party wall awards (£1,000–£3,000 per neighbour — common on terraced streets), build-over agreements with Thames Water (£300–£1,500 where drains run beneath the proposed extension), conservation officer consultations, structural engineer fees, drainage and asbestos surveys, and VAT at 20% on top of the base build cost. All of these are itemised in our fixed-price quote.
Does 2VP work on East Putney extensions?
Yes — East Putney is within our core London catchment. Our studio is at 20 Dawes Road in Fulham, 2.5km from East Putney. We've delivered extensions across the SW15 postcode and our subcontractor network covers Wandsworth. Free site visit, fixed-price quote, 10-year HomePro guarantee on the finished work.
Extension pricing for East Putney’s neighbours.
Twenty minutes on site in East Putney.
On us.
Nick Elias RIBA and Vladimir will visit your East Putney home, walk the site, check planning constraints, advise on PD vs full planning, and give you a realistic budget and programme — even if an extension isn’t the right move.
One number. Sixty seconds. No callback.
Price your East Putney extension using the same 2026 rate card we quote real clients with.
Price my East Putney extension →