From £26,296
Greater London, SW18
MAF Contracts Ltd is a South-West London based construction company with a track record of providing high-quality building services at a fair price...
From £26,232
The Sash Factory is an established extension buildering business in SW18. We come highly recommended and provide competitive quotes for your work.<...
From £25,856
Greater London, SW18
Finethorp Limited (Renovations) is a trusted extension builder serving customers in SW18 and the surrounding area. Contact us to today to get a com...
From £26,080
Experienced extension builder ready to quote for your work. Finethorp Limited is the best extension builder in SW18. No obligation free quotes and ...
From £26,064
Greater London, SW18
Need to find an Extension Builder near you for all your extension buildering work?
Beatrix Renovations and Repairs provides a local, truste...
From £26,408
Need an Extension Builder in SW18? KRANE CONSTRUCTION LIMITED has been helping local clients (5 mile radius) with their extension buildering jobs f...
From £26,136
London, SW18
Newspace Interiors is an established extension buildering business in SW18. We come highly recommended and provide competitive quotes for your work...
From £26,200
We are a full design and build company helping you to turn your ideas into reality. We mainly deliver renovation projects in South West London but ...
From £26,040
Greater London, SW18
Trusted and professional extension builder in SW18. Experienced in all extension buildering work and keeping within budget and on quote. Encompass ...
From £26,064
Trusted and professional extension builder in SW18. Experienced in all extension buildering work and keeping within budget and on quote. Saville Co...

A timber frame extension built in SW18 typically ranges from £25,856 (Finethorp Limited (Renovations) based in SW18) to £26,408 (KRANE CONSTRUCTION LIMITED based in SW18), but this will vary depending on the size of your extension, the design features you'd like and what your soil is like for the foundations.
Comparing extension builders estimates for building a timber frame extension gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build a timber frame extension in SW18 by posting a job with HaMuch and we'll send it to extension builders in SW18.
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building - £17,638

Two storey extension - £88,206

Build a timber frame extension - £26,138

Build a swimming pool - £81,138

Single storey extension - £57,752

Side return extension - £43,048

Install an RSJ - £2,338

Outbuilding - £10,138

Build a Mansard loft conversion - £52,138

Loft conversion - £35,040

Build a kitchen extension - £42,138

Hip to gable loft conversion - £42,138

Granny annexe - £87,138

Garden office - £10,138

Convert a Garage - £16,138

Garage - £18,638

Build a flat roof extension - £22,138

Build a dormer loft conversion - £42,138

Concrete foundations - £6,388

Convert a bungalow loft - £29,138

Convert a basement - £39,048