House Extension Builders in Cambridge

Service Overview

A well-planned extension can create a larger kitchen and dining area, a utility room, a home office or extra bedrooms while improving the way old and new spaces connect.

Prestige coordinates foundations, structural work, brick and blockwork, roofing, glazing, building services and agreed internal finishes to the professional drawings. You will have one point of contact from the first site conversation through to snagging and handover.

Tell us what you would like to add and share any plans you already have.
Most of the extensions we build are in and around Cambridge. You can put a first budget together with our extension cost calculator, and see finished work of the same kind in our completed projects. We build extensions across Cambridgeshire, including Great Shelford, Trumpington, Histon and Milton. Our full range of work is listed on the services page.

Cost, planning, Building Regulations and quotation guidance: Read our House Extension Costs Guide, Planning Permission Guide, Permitted Development Guide, Building Regulations Guide and Builder’s Quotation Guide.

See the work in detail: Explore a two-storey rear extension in Cambridge and a completed two-storey side extension in Little Eversden, both documented stage by stage. Where an extension has to match the brickwork of an older house, our gault brick matching case study in Cambridge shows how the new work was coursed through to a Victorian terrace.

Single-storey or two-storey?

The two are different jobs rather than different sizes of the same one. A single-storey extension is judged from the garden and its cost is driven by the ground, the opening in the back wall and the glazing. A two-storey extension is judged from the street, almost always needs planning permission, brings the Party Wall Act into play and has to tie into the existing foundations and roof. Each page sets out what is actually involved and what tends to go wrong.

What will it cost?

Before you speak to anyone, it is worth knowing roughly what you are dealing with. Our house extension cost calculator builds an early budget in separate lines — construction, VAT, the planning fee, contingency — rather than giving you one number that quietly leaves things out. It also tells you plainly which four figures nobody can estimate from a web page. If you want the reasoning behind it, the house extension cost guide sets out the benchmarks and where they come from.