Box · SN13extension build
extension build in
Box
Period property maintenance, lime mortar repointing and historic valley-side home care — preserving Box's distinctive architectural character.
- 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.
Box sits within a steep river valley — the same ground Brunel tunnelled through for the Great Western Railway — whose period properties, from stone farmhouses to former quarry workers' cottages, demand specialist care. Incorrect mortar mixes, inappropriate modern renders and poor drainage management can rapidly degrade these structures. Our approach uses traditional materials and techniques specified to the building's age and construction type, with valley-side scaffolding access, road-narrow site logistics and historic stone matching built into every project from day one.
When Box 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
Box properties we render
What extension build typically involves on the housing stock here.
Former quarry workers' cottages
Stone farmhouses on the valley sides
Victorian and Edwardian village housing
Detached homes on the higher ground
Period properties needing lime mortar repointing
Working in Box
Access & parking
Reached off the A4 and the B3109 between Bath and Corsham, with the A4 corridor giving straightforward access into Bath in about fifteen minutes by car.
Who lives here
Village families and period-property owners — a community with a strong sense of its quarrying heritage and the building stock that came with it.
Landmarks we work around
- Brunel's Box Tunnel on the Great Western Railway
- The old stone quarries beneath the valley
- Box Mill and the Bybrook river
- St Thomas à Becket Church
- The valley-side lanes and terrace rows
- The recreation ground and moor at the village core
Pricing notes
Valley-side scaffolding access, road-narrow site logistics and historic stone matching are built into every Box project from day one — the fixed quote reflects the access reality of a steep, narrow-lane village.
What Bath & BANES customers say
Verified reviews from recent work.
Other services in Box
extension build nearby
Questions about extension build? See the FAQs.
