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Builders in Clapham
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Charnwell Contractors

Home improvements, extensions and loft conversions across London

Rated 5 out of 5 on Google
1 Google reviews
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About Charnwell Contractors

Charnwell Contractors carries out home improvements and building projects across London and surrounding areas. Its services include kitchens, bathrooms, loft conversions, extensions, internal refurbishments, new builds and structural alterations.

The company offers free, no-obligation quotes after an initial consultation. A dedicated project manager coordinates trades, materials and inspections, and the team has in-house structural engineering expertise for calculations and designs.

Charnwell says its standard workmanship warranty typically covers structural framing, finishes, roofing and installed systems for 12 months. Large projects can have a 10-year insurance-backed warranty.

Areas covered

  • South London

Services

Building and renovations

  • House extensions
  • Loft conversions
  • Bathroom installations and renovations
  • Kitchen installations
  • Internal refurbishments
  • Structural alterations
  • New builds
  • Commercial building work
What their website says about each service
  • Bathroom Fitters
    “Our bathroom services cover everything from simple upgrades to full installations.”
  • Bathroom Renovation
    “A kitchen or bathroom renovation can take a few weeks”
  • Builders
    “We offer a full new-build service, managing all aspects from groundwork to final handover.”
  • House Extensions
    “We specialise in building seamless extensions that enhance your living space”
  • Foundations & Groundworks · mainly as part of larger projects
    “managing all aspects from groundwork to final handover”
  • House Renovations
    “Whether you're modernising a single room or undertaking a full-home renovation”
  • Loft Conversions
    “Maximise unused roof space with a loft conversion.”
  • Plumbers · mainly as part of larger projects
    “Our kitchen projects include cabinetry, plumbing, tiling, electrics, and final finishes”