House extension cost
in Battersea.
Battersea — SW11 — south across the river from Chelsea. The streets between Battersea Park and Clapham Junction are a classic Victorian terrace grid, with one of London's strongest property uplift rates for well-executed lofts.
What makes extension work in Battersea distinct.
Housing: Two- and three-storey Victorian terraces, plus some 1980s riverside developments around the new Battersea Power Station quarter.
Planning: Battersea Park, Clapham Common North Side and Wandsworth Common North Side conservation areas overlap parts of SW11. Outside these, PD rights are usually intact.
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 — SW11 numbers.
All figures inclusive of design, planning, build, contingency and VAT. The Battersea 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 Battersea and beyond.
Send me the guide.
What Battersea homeowners ask us.
How much does a house extension cost in Battersea in 2026?
Typical 2026 Battersea 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 Battersea multiplier (0.98×) reflects local labour rates, scaffold logistics and finish expectations.
Do I need planning permission for an extension in Battersea?
Battersea Park, Clapham Common North Side and Wandsworth Common North Side conservation areas overlap parts of SW11. Outside these, PD rights are usually intact. 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 Battersea houses?
Two- and three-storey Victorian terraces, plus some 1980s riverside developments around the new Battersea Power Station quarter. 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 Battersea?
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 Battersea homeowners out on extensions?
In SW11 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 Battersea extensions?
Yes — Battersea is within our core London catchment. Our studio is at 20 Dawes Road in Fulham, 3.0km from Battersea. We've delivered extensions across the SW11 postcode and our subcontractor network covers Wandsworth. Free site visit, fixed-price quote, 10-year HomePro guarantee on the finished work.
Extension pricing for Battersea’s neighbours.
Twenty minutes on site in Battersea.
On us.
Nick Elias RIBA and Vladimir will visit your Battersea 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 Battersea extension using the same 2026 rate card we quote real clients with.
Price my Battersea extension →