From £17,212
Add Surveyors is a trusted extension builder serving customers in B23 and the surrounding area. Contact us to today to get a competitive quote for ...
From £17,364
Need to find an Extension Builder near you for all your extension buildering work?
LC BUILDING SERVICES provides a local, trusted extension...
From £17,204
AJ Home Improvements is an established extension buildering business in B23. We come highly recommended and provide competitive quotes for your wor...
From £17,084
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,156
Guild Building Solutions Ltd is a well established, reliable and trustworthy company with over 25 years' experience. We are based in Sutton Coldfie...
From £17,484
Brickfast Builders is an established extension buildering business in B23. We come highly recommended and provide competitive quotes for your work....
From £17,340
Relax... you have found a reliable extension builder in B23. MD Services is a friendly and reliable company based in B23 who consider no job as too...
From £17,444
Need an Extension Builder in B23? D&J Advanced Builders has been helping local clients (20 mile radius) with their extension buildering jobs for ma...
From £17,628
Relax... you have found a reliable extension builder in B23. Sanwood is a friendly and reliable company based in B23 who consider no job as too big...
From £17,068
Dave Mattock is an established and experienced local extension builder in B23. Please contact us for a free, no obligation quote and competitive ra...

Underpinning ranges from £17,068 (Dave Mattock based in B44) to £17,628 (Sanwood based in B73), 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 B23 by posting a job with HaMuch and we will send it to extension builders in B23.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Sutton Coldfield | £25 | £202 |
| Underpin A Building near Birmingham | £25 | £197 |
| Underpin A Building near Smethwick | £25 | £195 |
| Underpin A Building near West Bromwich | £25 | £195 |
| Underpin A Building near Sandwell | £25 | £196 |
| Underpin A Building near Walsall | £25 | £195 |
| Underpin A Building near Oldbury | £25 | £196 |
| Underpin A Building near Wednesbury | £25 | £194 |
| Underpin A Building near Darlaston | £25 | £194 |
| Underpin A Building near Tipton | £25 | £196 |
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 - £17,298

Two storey extension - £87,698

Build a timber frame extension - £25,798

Build a swimming pool - £80,798

Single storey extension - £50,968

Side return extension - £39,232

Install an RSJ - £1,998

Outbuilding - £9,798

Build a Mansard loft conversion - £51,798

Loft conversion - £31,860

Build a kitchen extension - £41,798

Hip to gable loft conversion - £41,798

Granny annexe - £86,798

Garden office - £9,798

Convert a Garage - £15,798

Garage - £18,298

Build a flat roof extension - £21,798

Build a dormer loft conversion - £41,798

Concrete foundations - £6,048

Convert a bungalow loft - £28,798

Convert a basement - £35,232