From £18,300
Member since December 2022
Please refer to for further information. My name is Gus Sperin. I am self-employed electrician, and I have been ...
From £17,196
Trusted and professional extension builder in B15. Experienced in all extension buildering work and keeping within budget and on quote. Byrne Roofi...
From £17,076
Need an Extension Builder in B15? Barrys Home & Maintenance has been helping local clients (20 mile radius) with their extension buildering jobs fo...
From £17,212
Need to find an Extension Builder near you for all your extension buildering work?
BAKER CONSTRUCTION provides a local, trusted extension b...
From £17,444
Experienced extension builder ready to quote for your work. TKB Construction is the best extension builder in B15. No obligation free quotes and ma...
From £17,460
Mark Anthony Builders are here to help customers who need an Extension Builder in B15. We offer a competitive rate to complete all your extension b...
From £16,972
33 years experience focussing on full home refurbishments, extensions, kitchens & bathrooms, rubber roofing, floor screed & loft conversion...
From £17,380
Need an Extension Builder in B15? Mint Landscaping has been helping local clients (20 mile radius) with their extension buildering jobs for many ye...
From £17,444
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,332
Trusted and professional extension builder in B15. Experienced in all extension buildering work and keeping within budget and on quote. Staffordshi...

Underpinning ranges from £16,972 (Simms Building Services Ltd based in CV2) to £18,300 (Sperin Services based in B66), 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 B15 by posting a job with HaMuch and we will send it to extension builders in B15.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Birmingham | £29 | £227 |
| Underpin A Building near Smethwick | £29 | £226 |
| Underpin A Building near Oldbury | £29 | £227 |
| Underpin A Building near Halesowen | £29 | £227 |
| Underpin A Building near West Bromwich | £29 | £227 |
| Underpin A Building near Rowley Regis | £29 | £226 |
| Underpin A Building near Sandwell | £29 | £229 |
| Underpin A Building near Tipton | £29 | £227 |
| Underpin A Building near Solihull | £29 | £231 |
| Underpin A Building near Sutton Coldfield | £29 | £228 |
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 - £17,382

Two storey extension - £87,822

Build a timber frame extension - £25,882

Build a swimming pool - £80,882

Single storey extension - £52,632

Side return extension - £40,168

Install an RSJ - £2,082

Outbuilding - £9,882

Build a Mansard loft conversion - £51,882

Loft conversion - £32,640

Build a kitchen extension - £41,882

Hip to gable loft conversion - £41,882

Granny annexe - £86,882

Garden office - £9,882

Convert a Garage - £15,882

Garage - £18,382

Build a flat roof extension - £21,882

Build a dormer loft conversion - £41,882

Concrete foundations - £6,132

Convert a bungalow loft - £28,882

Convert a basement - £36,168