The 10 extension builders from Google's results for Bristol, ranked on Google rating, online presence and other factors. Updated 10 September 2026.
on GoogleBristol
CSW Extensions builds single-storey, double-storey, and kitchen extensions for homeowners across Bristol. The team also carries out internal property conversions and home refurbishments to help create additional living space.
0117 939 5130 37 Willoughby Cl, Bristol BS13 7NL
on GoogleKeynsham, Bristol
By Design Construction Services builds modern single and double-storey home extensions across Bristol and Keynsham. The firm also constructs kitchen extensions, contemporary garden rooms and custom outdoor spaces such as garden offices.
0117 203 4101 15 Charlton Park, Keynsham, Bristol BS31 2NB
on GoogleBristol
JW Carpentry Build designs and constructs side-return, wraparound, and multi-storey house extensions throughout Bristol and the South West. Their services include kitchen expansions, extra bedrooms, and over-garage room additions.
07557 195755 188 Bedminster Down Rd, Bristol BS13 7AF
on GoogleBristol
Bristol Design and Build delivers residential house extensions and property refurbishments across South Gloucestershire and Bristol. The team manages projects from initial planning and design through to final building work.
on GoogleAshton, Bristol
Co Rsol Conversions builds house extensions for residential properties in Ashton and across the wider Bristol region. The team manages building projects from initial planning through to final completion.
07730 000247 Unit 1, 177 S Liberty Ln, Ashton, Bristol BS3 2TN
on GoogleMoor Rd, Banwell
Evolution Developments carries out house extensions, loft conversions, and property renovations across Moor Road, Banwell, Somerset, and Bristol. The business also undertakes commercial fit-out projects alongside residential building work.
Unit 3, Court Farm, Moor Rd, Banwell BS29 6ET
on GoogleHenbury, BS10 7XA
Severn Property Solutions constructs house extensions for domestic clients in Henbury and the surrounding Bristol area. The team completes property additions to adapt, update, and expand existing residential living spaces.
07957 574149 Flat 7, Henbury, Bs107xa BS10 7XA
on GoogleBristol
Bristol Loft Conversion Specialists creates custom house extensions and loft builds for residential properties across Bristol and Bath. This family-run firm handles design, planning, and structural construction to adapt homes for growing families.
0117 965 9575 103A Filwood Rd, Bristol BS16 3RZ
Bristol
Foley Allan plans and constructs single-storey, two-storey, and kitchen extensions for homeowners in Bristol. The team manages the entire build process, including converting unused areas into practical living spaces.
Bristol
MRP Construction builds dormer, mansard, and hip-to-gable loft conversions, as well as property extensions, across Bristol, Westbury-on-Trym, and South Gloucestershire. The business transforms storage spaces into functional living areas.
In Bristol, single storey, per m² typically costs £1,900 – £2,700. Labour in Bristol runs 8% 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 bristol". They are ranked on Google rating, online presence and other factors.
The figures above are Bristol 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.