From £17,316
Bath, BA2
Experienced extension builder ready to quote for your work. J CROZIER (BUILDERS) LTD is the best extension builder in Bath. No obligation free quot...
From £17,700
Bath, BA2
Trusted and professional extension builder in Bath. Experienced in all extension buildering work and keeping within budget and on quote. CETH CONST...
From £17,572
Bath, BA2
BURNELL BUILDERS LTD is an established extension buildering business in Bath. We come highly recommended and provide competitive quotes for your wo...
From £17,604
Need an Extension Builder in Bath? RHayes Roofing has been helping local clients (20 mile radius) with their extension buildering jobs for many yea...
From £17,372
Need an Extension Builder in Bath? Marptree Design & Build limited has been helping local clients (20 mile radius) with their extension buildering ...
From £17,452
Bath, BA2
Relax... you have found a reliable extension builder in Bath. DAWSON BUILDING LIMITED is a friendly and reliable company based in Bath who consider...
From £17,468
Our building services company Wellsway Building Company was established in 2017. Since then we have been helping customers in Bath and the surround...
From £17,468
Bath, BA2
Need an Extension Builder in Bath? MOLEHILL CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension buildering jobs f...
From £17,580
Butterwood Property is a trusted extension builder serving customers in Bath and the surrounding area. Contact us to today to get a competitive quo...
From £18,428
We are a family run small business, we only use fully time served tradespeople. Having been building for 22years a still having a passion for quali...

Underpinning ranges from £17,316 (J CROZIER (BUILDERS) LTD based in BA2) to £18,428 (Unique Design & Build based in BS39), 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 Bath by posting a job with HaMuch and we will send it to extension builders in Bath.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Bath | £32 | £249 |
| Underpin A Building near Keynsham | £33 | £251 |
| Underpin A Building near Frome | £33 | £263 |
| Underpin A Building near Kingswood | £34 | £257 |
| Underpin A Building near Bristol | £33 | £255 |
| Underpin A Building near Clifton | £33 | £255 |
| Underpin A Building near Trowbridge | £34 | £266 |
| Underpin A Building near North Somerset | £32 | £245 |
| Underpin A Building near South Gloucestershire | £34 | £260 |
| Underpin A Building near Yate | £34 | £263 |
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 - £17,596

Two storey extension - £88,144

Build a timber frame extension - £26,096

Build a swimming pool - £81,096

Single storey extension - £56,920

Side return extension - £42,580

Install an RSJ - £2,296

Outbuilding - £10,096

Build a Mansard loft conversion - £52,096

Loft conversion - £34,650

Build a kitchen extension - £42,096

Hip to gable loft conversion - £42,096

Granny annexe - £87,096

Garden office - £10,096

Convert a Garage - £16,096

Garage - £18,596

Build a flat roof extension - £22,096

Build a dormer loft conversion - £42,096

Concrete foundations - £6,346

Convert a bungalow loft - £29,096

Convert a basement - £38,580