House extension cost
in Camden.
Camden Town — NW1 — north of Regent's Park. Victorian terraces and Georgian houses dominate the residential streets, with the canal and the markets defining the central character.
What makes extension work in Camden distinct.
Housing: Georgian and Victorian terraces, with some 1980s and 90s infill housing closer to the canal.
Planning: Camden Town and Regent's Canal conservation areas cover most of the residential streets. Article 4 directions apply in places.
Applications go to LB Camden. We submit on your behalf and handle party wall awards, build-over agreements and conservation officer correspondence end-to-end.
The five extension types — NW1 numbers.
All figures inclusive of design, planning, build, contingency and VAT. The Camden multiplier (1.05×) 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 Camden and beyond.
Send me the guide.
What Camden homeowners ask us.
How much does a house extension cost in Camden in 2026?
Typical 2026 Camden ranges (inc. design, planning, build, contingency & VAT): side-return extensions £95k–£168k; single-storey rear £116k–£221k; wraparound £179k–£336k; double-storey rear £189k–£399k; basement £263k–£788k. The Camden multiplier (1.05×) reflects local labour rates, scaffold logistics and finish expectations.
Do I need planning permission for an extension in Camden?
Camden Town and Regent's Canal conservation areas cover most of the residential streets. Article 4 directions apply in places. 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 Camden.
What extension type works best for Camden houses?
Georgian and Victorian terraces, with some 1980s and 90s infill housing closer to the canal. 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 Camden?
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 Camden processes planning applications in approximately 8–13 weeks depending on backlog.
What hidden costs catch Camden homeowners out on extensions?
In NW1 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 Camden extensions?
Yes — Camden is within our core London catchment. Our studio is at 20 Dawes Road in Fulham, 7.5km from Camden. We've delivered extensions across the NW1 postcode and our subcontractor network covers Camden. Free site visit, fixed-price quote, 10-year HomePro guarantee on the finished work.
Extension pricing for Camden’s neighbours.
Twenty minutes on site in Camden.
On us.
Nick Elias RIBA and Vladimir will visit your Camden 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 Camden extension using the same 2026 rate card we quote real clients with.
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