From £26,048
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in SE19. No obligation free quotes...
From £26,200
Relax... you have found a reliable extension builder in SE19. Derryard Construction Ltd is a friendly and reliable company based in SE19 who consid...
From £25,968
B J CULLEN BUILDERS are here to help customers who need an Extension Builder in SE19. We offer a competitive rate to complete all your extension bu...
From £26,032
Relax... you have found a reliable extension builder in SE19. Major Building Contractors Ltd is a friendly and reliable company based in SE19 who c...
From £26,184
Need to find an Extension Builder near you for all your extension buildering work?
Sz Builders provides a local, trusted extension builderi...
From £26,712
Experienced extension builder ready to quote for your work. Render is the best extension builder in SE19. No obligation free quotes and many happy ...
From £25,896
Experienced extension builder ready to quote for your work. Jhon is the best extension builder in SE19. No obligation free quotes and many happy cu...
From £25,880
Member since August 2025
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £26,192
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
From £26,312
skilled worker who specializes in completing a wide range of building and renovation projects

A timber frame extension built in SE19 typically ranges from £25,880 (Can design and Construction based in Ig11) to £26,712 (Render based in IG1), 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 SE19 by posting a job with HaMuch and we'll send it to extension builders in SE19.
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 - £17,642

Two storey extension - £88,214

Build a timber frame extension - £26,142

Build a swimming pool - £81,142

Single storey extension - £57,848

Side return extension - £43,102

Install an RSJ - £2,342

Outbuilding - £10,142

Build a Mansard loft conversion - £52,142

Loft conversion - £35,085

Build a kitchen extension - £42,142

Hip to gable loft conversion - £42,142

Granny annexe - £87,142

Garden office - £10,142

Convert a Garage - £16,142

Garage - £18,642

Build a flat roof extension - £22,142

Build a dormer loft conversion - £42,142

Concrete foundations - £6,392

Convert a bungalow loft - £29,142

Convert a basement - £39,102