From £17,804
Southall, UB2
JD Construction is an established and experienced local extension builder in UB2. Please contact us for a free, no obligation quote and competitive...
From £17,492
Gallant Contractors have partnered with Homeowners, Designers and Architects to deliver unrivalled construction, renovation, double glazing and ref...
From £17,508
Relax... you have found a reliable extension builder in UB2. Randhawa Design & Build Ltd is a friendly and reliable company based in UB2 who consid...
From £16,940
Experienced extension builder ready to quote for your work. Kairon Construction is the best extension builder in UB2. No obligation free quotes and...
From £17,684
Need to find an Extension Builder near you for all your extension buildering work?
Adrians Building Services Ltd provides a local, trusted ...
From £17,876
D.S Builders is a trusted extension builder serving customers in UB2 and the surrounding area. Contact us to today to get a competitive quote for e...
From £17,860
JP CONSTRUCTION is an established extension buildering business in UB2. We come highly recommended and provide competitive quotes for your work.
From £17,724
Image Design & Consultants is a trusted extension builder serving customers in UB2 and the surrounding area. Contact us to today to get a competiti...
From £17,940
Need to find an Extension Builder near you for all your extension buildering work?
Python Kitchen provides a local, trusted extension build...
From £17,900
CFP Construction Ltd is an established and experienced local extension builder in UB2. Please contact us for a free, no obligation quote and compet...

Underpinning ranges from £16,940 (Kairon Construction based in UB1) to £17,940 (Python Kitchen based in UB4), 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 UB2 by posting a job with HaMuch and we will send it to extension builders in UB2.
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 - £17,673

Two storey extension - £88,259

Build a timber frame extension - £26,173

Build a swimming pool - £81,173

Single storey extension - £58,456

Side return extension - £43,444

Install an RSJ - £2,373

Outbuilding - £10,173

Build a Mansard loft conversion - £52,173

Loft conversion - £35,370

Build a kitchen extension - £42,173

Hip to gable loft conversion - £42,173

Granny annexe - £87,173

Garden office - £10,173

Convert a Garage - £16,173

Garage - £18,673

Build a flat roof extension - £22,173

Build a dormer loft conversion - £42,173

Concrete foundations - £6,423

Convert a bungalow loft - £29,173

Convert a basement - £39,444