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Need an Extension Builder in South East? Exquisite Design & Build Ltd has been helping local clients (5 mile radius) with their extension builderin...
Vasi J
No Call out charges!
All Jobs Fully Insured and Guaranteed !!!
All aspects of Plumbing, Heating and Drains....
..."I am very pleased with the work carried out. All very clear and transparent." - ROMFORD,reviewed 10/01/18, KELLY
Experienced extension builder ready to quote for your work. The Perfectionist is the best extension builder in South East. No obligation free quote...
Experienced extension builder ready to quote for your work. D & G Building & Decorating is the best extension builder in South East. No obligation ...
Experienced extension builder ready to quote for your work. Cornerstones Construction is the best extension builder in South East. No obligation fr...
Trusted and professional extension builder in South East. Experienced in all extension buildering work and keeping within budget and on quote. Vida...
DUWIX BUILDING MAINTENANCE are here to help customers who need an Extension Builder in South East. We offer a competitive rate to complete all your...
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...

Underpinning ranges from £17,484 (RCB Group Design & Build based in SE21) to £17,956 (Ask Building based in SE1), but the final cost will depend on the method of underpinning used, how much of your foundations need underpinning and where you live.
Comparing extension builders estimates for underpinning gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
Get quotes to underpin your home in South East by posting a job with HaMuch and we will send it to extension builders in South East.
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