House extensions in Bristol
Most of our extensions are at the back of Victorian and Edwardian terraces, to make a kitchen that fits a table. We handle planning, the party wall, the steels and the drainage, and we finish the inside, so you deal with one firm from start to end.
Typical cost
£3,100 to £3,900 per m²
Time on site
14 to 20 weeks on site
What’s included
A typical 20 m² side-return kitchen extension costs £85,000 to £130,000 including the kitchen. Includes VAT.
Planning application or lawful development certificate
Party wall agreements
Foundations, drainage changes and build-over agreements with Wessex Water
Steel beams, roof structure and glazing
Underfloor heating and new electrics
Kitchen fitting, plastering, flooring and decorating
Side return, rear or wraparound
A side-return extension fills the narrow alley beside the back of a terrace and is the cheapest way to widen a galley kitchen. A rear extension goes out into the garden. A wraparound does both, and usually needs a planning application rather than permitted development.
The parts that take longest
The build itself is 14 to 20 weeks. Before that, allow 6 to 12 weeks for drawings, planning or a lawful development certificate, party wall agreements and, if the extension sits over a shared sewer, a build-over agreement with Wessex Water. We start all of these in parallel as soon as the drawings are signed off.
Questions we get asked
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