From £17,604
Need an Extension Builder in BS39? RHayes Roofing has been helping local clients (20 mile radius) with their extension buildering jobs for many yea...
From £17,316
Experienced extension builder ready to quote for your work. J CROZIER (BUILDERS) LTD is the best extension builder in BS39. No obligation free quot...
From £18,428
Mark Richards
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 BS39 by posting a job with HaMuch and we will send it to extension builders in BS39.
| 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 Bristol | £33 | £255 |
| Underpin A Building near Kingswood | £34 | £257 |
| Underpin A Building near Clifton | £33 | £255 |
| Underpin A Building near Frome | £33 | £263 |
| Underpin A Building near North Somerset | £32 | £245 |
| Underpin A Building near South Gloucestershire | £34 | £260 |
| Underpin A Building near Portishead | £33 | £247 |
| Underpin A Building near Trowbridge | £34 | £266 |
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 - £17,783

Two storey extension - £88,424

Build a timber frame extension - £26,283

Build a swimming pool - £81,283

Single storey extension - £60,653

Side return extension - £44,680

Install an RSJ - £2,483

Outbuilding - £10,283

Build a Mansard loft conversion - £52,283

Loft conversion - £36,400

Build a kitchen extension - £42,283

Hip to gable loft conversion - £42,283

Granny annexe - £87,283

Garden office - £10,283

Convert a Garage - £16,283

Garage - £18,783

Build a flat roof extension - £22,283

Build a dormer loft conversion - £42,283

Concrete foundations - £6,533

Convert a bungalow loft - £29,283

Convert a basement - £40,680