Camden's period terraces and conservation streets call for extensions designed with care. TrustBuilt Projects builds rear, side-return and lower-ground extensions across Camden Town, Kentish Town and Primrose Hill (NW1, NW5, NW3), all managed by us.
Camden's housing runs from solid Kentish Town Victorian terraces to grander period houses near Regent's Park and Primrose Hill. On the standard terrace, a rear or side-return extension to create an open-plan kitchen-diner is the most common project; on tighter plots, owners go down with a lower-ground extension rather than lose garden.
Conservation areas cover much of the borough — Camden Town, Kentish Town, Primrose Hill and Regent's Park — and Primrose Hill in particular has many listed buildings. That means extensions are usually planning-led, with close attention to materials and how the new work meets the original house.
We lead with the planning realities rather than assuming permitted development, because in much of Camden it doesn't apply. At the free site visit we tell you the realistic route, then coordinate the drawings, party wall notices and Building Regs.
Camden extension costs sit above the London average, varying with conservation sensitivity, access and structural complexity. Typical ranges:
| Project type | Typical cost | Timeline |
|---|---|---|
| Rear extension (single-storey) | £55,000 – £88,000 | 14–18 weeks |
| Side-return extension | £58,000 – £92,000 | 14–20 weeks |
| Lower-ground / basement extension | from £115,000 | 24–34 weeks |
| Double-storey extension | £100,000 – £170,000 | 20–30 weeks |
Every project is quoted in writing after a free site visit — these ranges are a guide only.
In much of the borough, yes — the Camden Town, Kentish Town, Primrose Hill and Regent's Park conservation areas restrict permitted development. We design to the local policy and manage the application rather than assuming an extension can go ahead without permission.
Often, but sensitively and within conservation (and, where listed, listed building consent) rules. We work carefully with original fabric and coordinate the necessary consents before any work begins.
Where the garden is large enough, a rear or side-return extension is usually simpler and cheaper. On tight plots where the garden is precious, a lower-ground extension adds space without losing it — though it's a bigger structural job. We advise on the best route for your plot.
Almost always — Camden terraces share boundaries with neighbours, so the Party Wall Act applies to most extensions. We handle the notices and can recommend trusted surveyors.
Free site visit, no obligation, written quote.
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