House extension cost
in Wimbledon Park.
Wimbledon Park — SW19 — between central Wimbledon and Southfields. Edwardian terraces and semis dominate, with the park and lake providing a leafy residential setting.
What makes extension work in Wimbledon Park distinct.
Housing: Edwardian terraces and semis with bay windows and outriggers, plus some 1920s housing on the eastern edges.
Planning: Wimbledon Park Estate Conservation Area covers most of the central streets.
Applications go to LB Merton. We submit on your behalf and handle party wall awards, build-over agreements and conservation officer correspondence end-to-end.
The five extension types — SW19 numbers.
All figures inclusive of design, planning, build, contingency and VAT. The Wimbledon Park multiplier (0.94×) 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 Wimbledon Park and beyond.
Send me the guide.
What Wimbledon Park homeowners ask us.
How much does a house extension cost in Wimbledon Park in 2026?
Typical 2026 Wimbledon Park ranges (inc. design, planning, build, contingency & VAT): side-return extensions £85k–£150k; single-storey rear £103k–£197k; wraparound £160k–£301k; double-storey rear £169k–£357k; basement £235k–£705k. The Wimbledon Park multiplier (0.94×) reflects local labour rates, scaffold logistics and finish expectations.
Do I need planning permission for an extension in Wimbledon Park?
Wimbledon Park Estate Conservation Area covers most of the central streets. 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 Merton.
What extension type works best for Wimbledon Park houses?
Edwardian terraces and semis with bay windows and outriggers, plus some 1920s housing on the eastern edges. 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 Wimbledon Park?
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 Merton processes planning applications in approximately 8–13 weeks depending on backlog.
What hidden costs catch Wimbledon Park homeowners out on extensions?
In SW19 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 Wimbledon Park extensions?
Yes — Wimbledon Park is within our core London catchment. Our studio is at 20 Dawes Road in Fulham, 7.0km from Wimbledon Park. We've delivered extensions across the SW19 postcode and our subcontractor network covers Merton. Free site visit, fixed-price quote, 10-year HomePro guarantee on the finished work.
Extension pricing for Wimbledon Park’s neighbours.
Twenty minutes on site in Wimbledon Park.
On us.
Nick Elias RIBA and Vladimir will visit your Wimbledon Park 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 Wimbledon Park extension using the same 2026 rate card we quote real clients with.
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