House extension cost
in Vauxhall.
Vauxhall — SW8 — south of the river opposite Westminster. A rapidly redeveloping district with newer apartment towers along the Thames and Victorian/Edwardian terraces on the streets behind.
What makes extension work in Vauxhall distinct.
Housing: Victorian and Edwardian terraces away from the river, plus high-density modern apartments around the new linear park.
Planning: Vauxhall Conservation Area covers the historic core around Vauxhall Cross; most surrounding streets are outside it.
Applications go to LB Lambeth. We submit on your behalf and handle party wall awards, build-over agreements and conservation officer correspondence end-to-end.
The five extension types — SW8 numbers.
All figures inclusive of design, planning, build, contingency and VAT. The Vauxhall multiplier (0.92×) 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 Vauxhall and beyond.
Send me the guide.
What Vauxhall homeowners ask us.
How much does a house extension cost in Vauxhall in 2026?
Typical 2026 Vauxhall ranges (inc. design, planning, build, contingency & VAT): side-return extensions £83k–£147k; single-storey rear £101k–£193k; wraparound £156k–£294k; double-storey rear £166k–£350k; basement £230k–£690k. The Vauxhall multiplier (0.92×) reflects local labour rates, scaffold logistics and finish expectations.
Do I need planning permission for an extension in Vauxhall?
Vauxhall Conservation Area covers the historic core around Vauxhall Cross; most surrounding streets are outside it. 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 Lambeth.
What extension type works best for Vauxhall houses?
Victorian and Edwardian terraces away from the river, plus high-density modern apartments around the new linear park. 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 Vauxhall?
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 Lambeth processes planning applications in approximately 8–13 weeks depending on backlog.
What hidden costs catch Vauxhall homeowners out on extensions?
In SW8 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 Vauxhall extensions?
Yes — Vauxhall is within our core London catchment. Our studio is at 20 Dawes Road in Fulham, 6.0km from Vauxhall. We've delivered extensions across the SW8 postcode and our subcontractor network covers Lambeth. Free site visit, fixed-price quote, 10-year HomePro guarantee on the finished work.
Extension pricing for Vauxhall’s neighbours.
Twenty minutes on site in Vauxhall.
On us.
Nick Elias RIBA and Vladimir will visit your Vauxhall 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 Vauxhall extension using the same 2026 rate card we quote real clients with.
Price my Vauxhall extension →