From £17,580
Relax... you have found a reliable extension builder in BA9. HILLIER CONSTRUCTION is a friendly and reliable company based in BA9 who consider no j...
From £17,780
SDK CONSTRUCTION LTD is an established and experienced local extension builder in BA9. Please contact us for a free, no obligation quote and compet...
From £17,660
Need an Extension Builder in BA9? Morris Concrete Designs has been helping local clients (20 mile radius) with their extension buildering jobs for ...
From £17,900
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,196
Need to find an Extension Builder near you for all your extension buildering work?
2 Counties Construction provides a local, trusted extens...
From £17,780
Experienced extension builder ready to quote for your work. Burfitt and Garrett Ltd is the best extension builder in BA9. No obligation free quotes...
From £17,540
Mark King Building Ltd is an established and experienced local extension builder in BA9. Please contact us for a free, no obligation quote and comp...
From £17,676
Pj building services is a trusted extension builder serving customers in BA9 and the surrounding area. Contact us to today to get a competitive quo...
From £18,596
Need to find an Extension Builder near you for all your extension buildering work?
Neil Massey Roofing Contractor provides a local, trusted...
From £17,636
Experienced extension builder ready to quote for your work. Craft Renovations is the best extension builder in BA9. No obligation free quotes and m...

Underpinning ranges from £17,196 (2 Counties Construction based in SP3) to £18,596 (Neil Massey Roofing Contractor based in BA21), 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 BA9 by posting a job with HaMuch and we will send it to extension builders in BA9.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Frome | £33 | £263 |
| Underpin A Building near South Somerset | £62 | £270 |
| Underpin A Building near Yeovil | £34 | £294 |
| Underpin A Building near Bath | £32 | £249 |
| Underpin A Building near Trowbridge | £34 | £266 |
| Underpin A Building near Dorchester | £30 | £230 |
| Underpin A Building near Keynsham | £33 | £251 |
| Underpin A Building near Bridgwater | £30 | £236 |
| Underpin A Building near Devizes | £32 | £242 |
| Underpin A Building near Salisbury | £35 | £247 |
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 - £17,734

Two storey extension - £88,352

Build a timber frame extension - £26,234

Build a swimming pool - £81,234

Single storey extension - £59,688

Side return extension - £44,137

Install an RSJ - £2,434

Outbuilding - £10,234

Build a Mansard loft conversion - £52,234

Loft conversion - £35,948

Build a kitchen extension - £42,234

Hip to gable loft conversion - £42,234

Granny annexe - £87,234

Garden office - £10,234

Convert a Garage - £16,234

Garage - £18,734

Build a flat roof extension - £22,234

Build a dormer loft conversion - £42,234

Concrete foundations - £6,484

Convert a bungalow loft - £29,234

Convert a basement - £40,137