CB3 · Newnham · Cambridge
Extensions in Newnham
We design and build rear, side, wraparound and two-storey extensions in Newnham — including in conservation areas and on listed properties.
Newnham · CB3
Newnham
Working in Newnham.
Newnham sits west of the river — Edwardian and Victorian villas, college fellows' houses, and a tight conservation area that runs from Grange Road to the Backs.
Most of Newnham is within the West Cambridge Conservation Area. Article 4 directions apply to some streets, which means works that would normally be permitted development require a planning application. We've worked across CB3 and handle the planning side directly.
What we do
Extensions we build in Newnham.
- —Rear extensions, single and double storey
- —Side returns and wraparound extensions
- —Two-storey rear and side extensions
- —Loft conversions with dormer or mansard
- —Listed building consent and conservation-area planning
- —Party wall agreements and structural calculations
Recent work in Newnham
Projects we've finished in Newnham.
Also in Newnham
Other things we do in Newnham.
Kitchens in Newnham
Designed kitchens with joinery and stone, refits and as part of an extension.
ExploreBathrooms in Newnham
Family, en-suite, principal and wet rooms — stone, brass and considered detail.
ExploreGarden Rooms in Newnham
Garden offices, studios, gyms and annexes — built like a house, not a shed.
ExploreCommon questions
About extensions in Newnham.
- How long does a Newnham extension take to build?
- Single-storey rear extensions of 25–40m² usually run 10–14 weeks on site, with 6–12 weeks of design and planning beforehand. Two-storey extensions add roughly four weeks to the build.
- Can you work on listed buildings or in conservation areas?
- Yes. A significant share of Newnham sits within a conservation area, and we handle listed building consent, Article 4 directions, and conservation officer liaison routinely.
- How much does an extension in Newnham cost?
- As of 2026, a well-built single-storey rear extension typically runs £2,800–£3,800 per m² including finishes. Glazing, structural complexity and listed status all push that range.
- Do you handle planning permission?
- Yes — drawings, planning portal submission, conservation and listed building consent, and any pre-application enquiries with Newnham City or South Cambs.