From £17,636
Experienced extension builder ready to quote for your work. Craft Renovations is the best extension builder in BA11. No obligation free quotes and ...
From £17,372
McIntosh DBR Ltd. is an established extension buildering business in BA11. We come highly recommended and provide competitive quotes for your work....
From £17,372
Need an Extension Builder in BA11? Marptree Design & Build limited has been helping local clients (20 mile radius) with their extension buildering ...
From £17,364
Relax... you have found a reliable extension builder in BA11. Bryan Loveday Services Limited is a friendly and reliable company based in BA11 who c...
From £17,780
Need an Extension Builder in BA11? EMBERSON GENERAL BUILDERS has been helping local clients (20 mile radius) with their extension buildering jobs f...
From £17,396
Experienced extension builder ready to quote for your work. George Davies Group Ltd is the best extension builder in BA11. No obligation free quote...
From £17,700
Trusted and professional extension builder in BA11. Experienced in all extension buildering work and keeping within budget and on quote. CETH CONST...
From £17,572
BURNELL BUILDERS LTD is an established extension buildering business in BA11. We come highly recommended and provide competitive quotes for your wo...
From £17,604
Need an Extension Builder in BA11? RHayes Roofing has been helping local clients (20 mile radius) with their extension buildering jobs for many yea...

Underpinning ranges from £17,364 (Bryan Loveday Services Limited based in BA12) to £17,796 (Prestige home improvements based in BA11), 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 BA11 by posting a job with HaMuch and we will send it to extension builders in BA11.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Frome | £28 | £220 |
| Underpin A Building near Trowbridge | £29 | £223 |
| Underpin A Building near Bath | £28 | £221 |
| Underpin A Building near Keynsham | £29 | £222 |
| Underpin A Building near Devizes | £29 | £218 |
| Underpin A Building near North Wiltshire | £29 | £218 |
| Underpin A Building near West Wiltshire | £29 | £218 |
| Underpin A Building near Kingswood | £29 | £223 |
| Underpin A Building near Chippenham | £29 | £218 |
| Underpin A Building near Bristol | £29 | £222 |
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 - £17,559

Two storey extension - £88,089

Build a timber frame extension - £26,059

Build a swimming pool - £81,059

Single storey extension - £56,184

Side return extension - £42,166

Install an RSJ - £2,259

Outbuilding - £10,059

Build a Mansard loft conversion - £52,059

Loft conversion - £34,305

Build a kitchen extension - £42,059

Hip to gable loft conversion - £42,059

Granny annexe - £87,059

Garden office - £10,059

Convert a Garage - £16,059

Garage - £18,559

Build a flat roof extension - £22,059

Build a dormer loft conversion - £42,059

Concrete foundations - £6,309

Convert a bungalow loft - £29,059

Convert a basement - £38,166