From £17,660
Trusted and professional extension builder in Wembley. Experienced in all extension buildering work and keeping within budget and on quote. PARKWAY...
From £17,756
Londonderry, HA9
Relax... you have found a reliable extension builder in Wembley. Pillar Ltd is a friendly and reliable company based in Wembley who consider no job...
From £17,148
David Capita Ltd is a specialist in the renovation of both residential and commercial properties in London; covering Nor...
From £17,676
Wembley London, HA9
As a reliable, professional roofing and building contractor based in North West London, we provide roofing services of unrivalled quality across Lo...
From £17,484
Need to find an Extension Builder near you for all your extension buildering work?
Accolade Design and Build provides a local, trusted exte...
From £17,748
Wembley, HA9
C & A Contractors is a trusted extension builder serving customers in Wembley and the surrounding area. Contact us to today to get a competitive qu...
From £17,484
Our main goal is to create a better home for you, leaving you with a higher standard of living, a purposeful life in a space that reflects your sty...
From £17,572
Wembley, HA9
WHIPP CONSTRUCTION LTD is an established extension buildering business in Wembley. We come highly recommended and provide competitive quotes for yo...
From £17,868
Trusted and professional extension builder in Wembley. Experienced in all extension buildering work and keeping within budget and on quote. Rocko C...
From £17,540
Wembley, HA9
Trusted and professional extension builder in Wembley. Experienced in all extension buildering work and keeping within budget and on quote. Dynamic...

Underpinning ranges from £17,148 (David Capita Ltd based in HA9) to £17,868 (Rocko Construction based in HA9), 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 Wembley by posting a job with HaMuch and we will send it to extension builders in Wembley.
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 - £17,594

Two storey extension - £88,140

Build a timber frame extension - £26,094

Build a swimming pool - £81,094

Single storey extension - £56,872

Side return extension - £42,553

Install an RSJ - £2,294

Outbuilding - £10,094

Build a Mansard loft conversion - £52,094

Loft conversion - £34,628

Build a kitchen extension - £42,094

Hip to gable loft conversion - £42,094

Granny annexe - £87,094

Garden office - £10,094

Convert a Garage - £16,094

Garage - £18,594

Build a flat roof extension - £22,094

Build a dormer loft conversion - £42,094

Concrete foundations - £6,344

Convert a bungalow loft - £29,094

Convert a basement - £38,553