From £17,756
Londonderry, SE16
SCL Design & Build Ltd are here to help customers who need an Extension Builder in SE16. We offer a competitive rate to complete all your extension...
From £17,684
Need to find an Extension Builder near you for all your extension buildering work?
Ac construction provides a local, trusted extension buil...
From £17,772
Greater London, SE16
Queenie Chan Studio are here to help customers who need an Extension Builder in SE16. We offer a competitive rate to complete all your extension bu...
From £17,844
MARMAREX is a trusted extension builder serving customers in SE16 and the surrounding area. Contact us to today to get a competitive quote for exte...
From £17,812
London, SE16
We are a London-based contractor with significant experience in prime property construction and refurbishment, delivering projects for our clients ...
From £17,876
Need an Extension Builder in SE16? Exquisite Design & Build Ltd has been helping local clients (5 mile radius) with their extension buildering jobs...
From £17,700
Rotherhithe, SE16
Trusted and professional extension builder in SE16. Experienced in all extension buildering work and keeping within budget and on quote. ROOSE CONS...
From £17,596
Ballara Ltd is an established and experienced local extension builder in SE16. Please contact us for a free, no obligation quote and competitive ra...
From £17,540
Greater London, SE16
Ballara Limited was set up by Darryl Pitt in 2008, however, Darryl has been involved in the building industry for over 20 years. He started out a...
From £17,516
WiseContract are here to help customers who need an Extension Builder in SE16. We offer a competitive rate to complete all your extension builderin...

Underpinning ranges from £17,516 (WiseContract based in se14) to £17,876 (Exquisite Design & Build Ltd based in SE16), 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 SE16 by posting a job with HaMuch and we will send it to extension builders in SE16.
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 - £17,710

Two storey extension - £88,314

Build a timber frame extension - £26,210

Build a swimming pool - £81,210

Single storey extension - £59,192

Side return extension - £43,858

Install an RSJ - £2,410

Outbuilding - £10,210

Build a Mansard loft conversion - £52,210

Loft conversion - £35,715

Build a kitchen extension - £42,210

Hip to gable loft conversion - £42,210

Granny annexe - £87,210

Garden office - £10,210

Convert a Garage - £16,210

Garage - £18,710

Build a flat roof extension - £22,210

Build a dormer loft conversion - £42,210

Concrete foundations - £6,460

Convert a bungalow loft - £29,210

Convert a basement - £39,858