House extension cost
in Notting Hill.
Notting Hill — W11 — north of Kensington and one of London's most iconic postcodes. The streets around Westbourne Park Road and Ledbury Road are filled with stucco-fronted Victorian terraces and grand garden squares.
What makes extension work in Notting Hill distinct.
Housing: Stucco terraces, Italianate villas, garden squares — many converted to flats, premium single-family stock remaining on Ladbroke Grove and around Portobello.
Planning: Ladbroke, Pembridge and Norland conservation areas cover virtually all of W11. Listed buildings are scattered throughout.
Applications go to Royal Borough of Kensington & Chelsea. We submit on your behalf and handle party wall awards, build-over agreements and conservation officer correspondence end-to-end.
The five extension types — W11 numbers.
All figures inclusive of design, planning, build, contingency and VAT. The Notting Hill multiplier (1.22×) 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 Notting Hill and beyond.
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What Notting Hill homeowners ask us.
How much does a house extension cost in Notting Hill in 2026?
Typical 2026 Notting Hill ranges (inc. design, planning, build, contingency & VAT): side-return extensions £110k–£195k; single-storey rear £134k–£256k; wraparound £207k–£390k; double-storey rear £220k–£464k; basement £305k–£915k. The Notting Hill multiplier (1.22×) reflects local labour rates, scaffold logistics and finish expectations.
Do I need planning permission for an extension in Notting Hill?
Ladbroke, Pembridge and Norland conservation areas cover virtually all of W11. Listed buildings are scattered throughout. 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 Royal Borough of Kensington & Chelsea.
What extension type works best for Notting Hill houses?
Stucco terraces, Italianate villas, garden squares — many converted to flats, premium single-family stock remaining on Ladbroke Grove and around Portobello. 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 Notting Hill?
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. Royal Borough of Kensington & Chelsea processes planning applications in approximately 8–13 weeks depending on backlog.
What hidden costs catch Notting Hill homeowners out on extensions?
In W11 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 Notting Hill extensions?
Yes — Notting Hill is within our core London catchment. Our studio is at 20 Dawes Road in Fulham, 3.0km from Notting Hill. We've delivered extensions across the W11 postcode and our subcontractor network covers Kensington & Chelsea. Free site visit, fixed-price quote, 10-year HomePro guarantee on the finished work.
Extension pricing for Notting Hill’s neighbours.
Twenty minutes on site in Notting Hill.
On us.
Nick Elias RIBA and Vladimir will visit your Notting Hill 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 Notting Hill extension using the same 2026 rate card we quote real clients with.
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