Keynsham · BS31extension build
extension build in
Keynsham
Rear extensions, structural steel knock-throughs and open-plan family living upgrades across Keynsham's riverside and suburban housing stock.
- Free site visit
- Fixed written quote
- Written workmanship guarantee
House extensions in Bath, Trowbridge and across BANES — from a side-return on a terraced street to a double-storey rear build. We handle planning drawings, structural steel, groundworks and Building Control in one fixed-price contract, so the number you sign is the number you pay. Single-storey builds typically run 10–14 weeks; double-storey 16–24 weeks — both confirmed at quote, not discovered mid-build.
Keynsham has changed shape substantially since the old Cadbury's factory site gave way to new-build housing on the Somerdale side of town, sitting alongside long-established 1930s semis and post-war estates on the other. That mix gives homeowners real scope to extend and reconfigure — structural steel for open-plan kitchen-diners, rear extensions that open onto the garden, and garage conversions that turn dead space into a usable room. We work across both the older housing stock and the newer developments, with the same fixed-quote pricing and site management either way, and riverside proximity to the Avon and Chew is assessed at the initial site visit.
When Keynsham homeowners call us about extension build
If any of these sound like your property, this is the service you want.
Builders who quote cheap and re-quote after the concrete goes in — fixed price from day one
Planning permission surprises — we flag Bath conservation-area constraints at the site visit
Extensions that ignore the existing house — matching brick, rooflines and levels
No party wall paperwork — we handle notices and surveyors
Structural steel bought as an afterthought — RSJs come with proper calcs
Site chaos for months — scheduled trades, daily tidy, one timeline
Keynsham properties we render
What extension build typically involves on the housing stock here.
Inter-war semi-detached housing (the backbone of the town)
Post-war estate housing on the Chandag and Park Estate sides
New-build homes on the Somerdale development
Period properties near the High Street and Temple Street
Riverside homes along the Avon and Chew
Working in Keynsham
Access & parking
Directly on the London to Bath railway line with frequent services into both Bath and Bath, on the A4 between the two cities, and connected by the Bath and Bath Railway Path for cyclists.
Who lives here
Families and commuters using the fast rail links into both cities, plus established owner-occupiers in the 1930s and post-war stock investing in extensions and reconfigurations.
Landmarks we work around
- The Somerdale development on the former Cadbury site
- Keynsham High Street and the Civic Centre
- Keynsham railway station on the Bath to Bath line
- The River Chew and Memorial Park
- Fry House and the Somerdale gardens
- The A4 corridor between Bath and Bath
Pricing notes
Riverside proximity to the Avon and Chew, 1930s-semi structural considerations and newer-development permitted development rights are all assessed at the initial site visit — one fixed quote, no provisional sums.
What Bath & BANES customers say
Verified reviews from recent work.
Other services in Keynsham
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