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Need an Extension Builder in SE15? Exquisite Design & Build Ltd has been helping local clients (5 mile radius) with their extension buildering jobs...
Experienced extension builder ready to quote for your work. The Perfectionist is the best extension builder in SE15. No obligation free quotes and ...
Trusted and professional extension builder in SE15. Experienced in all extension buildering work and keeping within budget and on quote. Vidanov Bu...
DUWIX BUILDING MAINTENANCE are here to help customers who need an Extension Builder in SE15. We offer a competitive rate to complete all your exten...
Peter Cesma
Experienced builder in all aspects of building works. All work guaranteed. Quality finish, promt ,honest and reliable services. Public liabil...
At Home Tranformers Ltd we have been fitting bespoke bathrooms for over 10 years. We pride ourselves on being the go-to bathroom fitters for discer...
Need to find an Extension Builder near you for all your extension buildering work?
Ask Building provides a local, trusted extension builder...
AAA Design Decorators are here to help customers who need an Extension Builder in SE15. We offer a competitive rate to complete all your extension ...
Need to find an Extension Builder near you for all your extension buildering work?
AGRI CONSTRUCTION provides a local, trusted extension bu...
South East Builders are here to help customers who need an Extension Builder in SE15. We offer a competitive rate to complete all your extension bu...

Garden offices range from the cheapest of £10,024 (AGRI CONSTRUCTION based in SE1) to the dearest of £10,456 (Ask Building based in SE1), but these are only estimates.
The best way to compare costs is to get actual quotes.
Get rates and quotes to build a garden office in SE15 by posting a job with HaMuch. We'll send it to extension builders in SE15.
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 - £17,718

Two storey extension - £88,326

Build a timber frame extension - £26,218

Build a swimming pool - £81,218

Single storey extension - £59,352

Side return extension - £43,948

Install an RSJ - £2,418

Outbuilding - £10,218

Build a Mansard loft conversion - £52,218

Loft conversion - £35,790

Build a kitchen extension - £42,218

Hip to gable loft conversion - £42,218

Granny annexe - £87,218

Garden office - £10,218

Convert a Garage - £16,218

Garage - £18,718

Build a flat roof extension - £22,218

Build a dormer loft conversion - £42,218

Concrete foundations - £6,468

Convert a bungalow loft - £29,218

Convert a basement - £39,948