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Select your affordable DA14 extension builder
Need an Extension Builder in DA14? RJC BUILDING SERVICES has been helping local clients (10 mile radius) with their extension buildering jobs for m...
Experienced extension builder ready to quote for your work. NA Brickwork is the best extension builder in DA14. No obligation free quotes and many ...
Need to find an Extension Builder near you for all your extension buildering work?
Master Builders provides a local, trusted extension buil...
R Tredget & Son are here to help customers who need an Extension Builder in DA14. We offer a competitive rate to complete all your extension builde...
Pro-Tec Roofing & Building Services Ltd is an established and experienced local extension builder in DA14. Please contact us for a free, no obligat...
Our building services company May & Sons Building Solutions Limited is a family-run business established in 2019. Since then we have been helping c...
Direct Roofing is an established and experienced local extension builder in DA14. Please contact us for a free, no obligation quote and competitive...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Darius Kudzevicius
Trusted and professional extension builder in DA14. Experienced in all extension buildering work and keeping within budget and on quote. Self emplo...
From £17,556
Sunny Build Ltd is an established and experienced local extension builder in DA14. Please contact us for a free, no obligation quote and competitiv...

Underpinning ranges from £17,364 (RJC BUILDING SERVICES based in BR5) to £17,900 (May & Sons Building Solutions Limited based in BR7), 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 DA14 by posting a job with HaMuch and we will send it to extension builders in DA14.
"Underpinning" - BEXLEY, job posted 03/10/25
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 - £17,606

Two storey extension - £88,160

Build a timber frame extension - £26,106

Build a swimming pool - £81,106

Single storey extension - £57,128

Side return extension - £42,697

Install an RSJ - £2,306

Outbuilding - £10,106

Build a Mansard loft conversion - £52,106

Loft conversion - £34,748

Build a kitchen extension - £42,106

Hip to gable loft conversion - £42,106

Granny annexe - £87,106

Garden office - £10,106

Convert a Garage - £16,106

Garage - £18,606

Build a flat roof extension - £22,106

Build a dormer loft conversion - £42,106

Concrete foundations - £6,356

Convert a bungalow loft - £29,106

Convert a basement - £38,697