The 10 extension builders from Google's results for Bath, ranked on Google rating, online presence and other factors. Updated 10 September 2026.
on GoogleArno's Vale, Bristol
Barefoot Architects designs residential extensions for homes on the outskirts of Bath and surrounding areas. Their architectural projects include adding open-plan kitchen and dining spaces fitted with large glazed windows and doors.
0117 907 0971 Unit 5, 2 Paintworks, Arno's Vale, Bristol BS4 3EH
on GoogleBath
Bath Heritage Building converts attic spaces into functional living areas such as extra bedrooms, en suite bathrooms, and home studios. The firm also constructs new builds, house extensions, and property renovations across Bath.
01225 808446 15 Acacia Grove, Bath BA2 2HG
on GoogleBathwick, Bath
TEA Architects specialises in period property extensions across Bath, including projects within conservation areas. The firm designs modern additions that integrate with historic Victorian structures to expand internal living spaces.
07890 904378 5 Argyle St, Bathwick, Bath BA2 4BA
on GoogleBath
The Ugly Duckling Building Company fits kitchens in Bath and across Somerset, and also takes on home extensions and remodelling. A full kitchen job covers ripping out the old units, rerouting pipework and wiring, plastering, tiling, flooring and decorating before the new cabinets go in.
07702 890292 97 Midford Rd, Bath BA2 5RT
on GoogleBath
Future Building Solutions constructs single-storey and multi-room home extensions for properties in Bath and the surrounding region. The team builds extra living space and storage areas designed to match the existing aesthetic of each house.
Bath
Home extension projects in Bath are carried out by Blok Building, including kitchen extensions, side returns, and single or double-storey additions. The team handles all aspects of construction from planning permission through to final finishes.
07412 486629 Bathwick, Bath BA2 8DJ
Bath
Loft Conversion Architects in Derby produces architectural designs and planning applications for house extensions and loft conversions. The firm creates plans for properties ranging from period terraces to modern houses.
Bath
Quickkit Build provides extension building services in Bath.
Bath
Smart Solutions Building Services Ltd constructs timber frame and traditional house extensions across Bath, Radstock and Trowbridge. The team also undertakes loft conversions along with kitchen and bathroom installations to expand residential properties.
07850 351827 29 Eastbourne Ave, Bath BA1 6EN
Bath
Temple and Temple provides architectural design, planning assistance and refurbishment services for residential extensions in Bath and Wiltshire. Their projects cover garden integration as well as work on listed buildings throughout the area.
In Bath, single storey, per m² typically costs £2,100 – £2,900. Labour in Somerset runs 14% above the UK median, which accounts for most of the difference from the same job elsewhere.
These are the firms from Google's results for "house extensions bath". They are ranked on Google rating, online presence and other factors.
The figures above are Bath ranges. These explain what drives them, so you can read a quote properly.
Per-square-metre prices for single-storey, two-storey, side return and kitchen extensions, costs by size, the fees outside the build price, and planning limits by nation.
The permitted development limits for extensions, lofts, porches and outbuildings in England, where the rights do not apply, what prior approval and a certificate cost, and how Wales, Scotland and NI differ.
When the Party Wall Act applies, which notice to serve and how far ahead, what your neighbour can do, what a surveyor's award costs, and the rules in Scotland and NI.
Under permitted development, three metres for a terrace or semi and four for a detached, doubled to six and eight under the prior approval process. Height, materials and how much garden you cover all carry separate limits, and none of it applies in a conservation area.
If you are excavating within three metres of a neighbour's foundations or building on the boundary, yes. You must serve notice two months before work starts. Skipping it is the most common reason extension projects stall.