Modern extension with timber cladding on a period Bath-area home by Aspect Builds

Keynsham · BS31Riverside market town

Builders 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
  • Fully insured

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.

Loft conversion in Bath by Aspect Builds — new rear dormer and Juliet balcony
Housing stock

Property types in Keynsham

What we typically work on here, and what the housing stock means for how the job is specified.

  • 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

Services

What we do in Keynsham

Every service is available across BS31 and the surrounding streets.

Local knowledge

Working in Keynsham

Recent work nearby

    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

    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.

    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.

    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.

    Systems

    Materials & systems we use in Keynsham

    The same manufacturer-approved systems we specify across every job, whichever service you need.

    Howdens

    Bath trade account — supply priced into your fixed quote.

    • Howdens Joinery kitchen ranges
    • Trade-price carcasses and doors

    Magnet & Wren

    We quote supply from the brand that fits your budget and finish level.

    • Magnet Trade
    • Wren Kitchens

    Engineering & materials

    Steel calcs supplied for Building Control; brick and roof matched to the existing house.

    • RSJ / steel beams with structural calculations
    • Blockwork and brick matching
    • Insulated warm-roof and flat-roof systems
    • SIPS where appropriate

    Structural & access

    Stair placement designed around the Bath terrace footprint — the make-or-break of any Bath loft.

    • RSJ / steel beams with structural calcs
    • Staircase systems (space-saving and traditional)

    Roofing & insulation

    Roof windows specified for conservation areas where needed.

    • Velux / keylight roof windows
    • Warm-roof insulation to current Part L

    Heating & electrics

    Certified electricians and plumbers on the Aspect team.

    • Whole-house rewires to current BS 7671
    • Central heating system replacement
    • Smart-home integration (Nest, Tado)

    Heritage materials

    Lime mortars only on Bath stone — cement traps moisture and spalls the face.

    • NHL 3.5 / 5 lime mortars
    • Bath stone (Hartham Park, Combe Down)
    • Traditional lime pointing

    Structure & services

    New builds are detailed for modern standards — EV charging provision, Part L compliance.

    • RSJ / steel with structural calcs
    • Tankmatic / Type C basement waterproofing
    • Air-source ready heating provisions

    Paving & surfaces

    Full-bed mortar fixing with primed backs for porcelain — the method that survives.

    • Natural stone (Indian sandstone, Bath stone)
    • Porcelain paving (2cm outdoor grade)
    • Composite and hardwood decking

    Plasters & renders

    System chosen by substrate and exposure — breathable where the wall needs it.

    • NHL lime (2 & 3.5)
    • Hot-mixed lime
    • British Gypsum
    • Silicone render systems

    Paints & finishes

    Trade-grade paint as standard; premium brands on request at cost. Limewash for breathable walls.

    • Farrow & Ball
    • Little Greene
    • Dulux Trade
    • Crown Trade

    Roofline systems

    Roofline replaced in full runs, not patches — matched colours as standard.

    • uPVC fascia and soffit systems
    • Gutter replacement (uPVC and cast)
    • Lead flashing and repairs

    Frame systems

    Material choice matched to the property — conservation areas often need timber or like-for-like.

    • UPVC (multi-chamber)
    • Aluminium (Slimline, Smarts, Cortizo)
    • Timber (hardwood, accoya)

    Sanitaryware suppliers

    Supply priced at trade rates within your fixed quote.

    • Howdens Bathrooms
    • CP Hart
    • Victorian Plumbing
    Reviews

    What Bath homeowners say

    Verified reviews from recent work across Bath and BANES.

    Bath & BANES

    Planning a project in Keynsham?

    Free site visit across Keynsham and the rest of Bath, a fixed written quote within 48 hours, and no pressure either way.

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