House extension cost
in Putney.
Putney — across Putney Bridge from Fulham — has been one of 2VP's busiest loft territories since 2018. The Edwardian and inter-war terraces between Upper Richmond Road and the heath are textbook L-shape dormer candidates.
What makes extension work in Putney distinct.
Housing: Edwardian three-storey terraces with kitchen outriggers, plus inter-war semi-detached houses on the south side towards Putney Heath.
Planning: Putney Embankment, West Putney and Lower Common conservation areas restrict PD on the river-side streets, but most of central Putney qualifies for PD on rear dormers.
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 Putney multiplier (0.98×) 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 Putney and beyond.
Send me the guide.
What Putney homeowners ask us.
How much does a house extension cost in Putney in 2026?
Typical 2026 Putney ranges (inc. design, planning, build, contingency & VAT): side-return extensions £88k–£157k; single-storey rear £108k–£206k; wraparound £167k–£314k; double-storey rear £176k–£372k; basement £245k–£735k. The Putney multiplier (0.98×) reflects local labour rates, scaffold logistics and finish expectations.
Do I need planning permission for an extension in Putney?
Putney Embankment, West Putney and Lower Common conservation areas restrict PD on the river-side streets, but most of central Putney qualifies for PD on rear dormers. 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 Putney houses?
Edwardian three-storey terraces with kitchen outriggers, plus inter-war semi-detached houses on the south side towards Putney Heath. 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 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 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 Putney extensions?
Yes — Putney is within our core London catchment. Our studio is at 20 Dawes Road in Fulham, 1.5km from 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 Putney’s neighbours.
Twenty minutes on site in Putney.
On us.
Nick Elias RIBA and Vladimir will visit your 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 Putney extension using the same 2026 rate card we quote real clients with.
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