From £18,084
Need an Extension Builder in BH15? RNTP ltd has been helping local clients (20 mile radius) with their extension buildering jobs for many years. Ge...
From £17,516
Trusted and professional extension builder in BH15. Experienced in all extension buildering work and keeping within budget and on quote. GMS Carpen...
From £17,676
Trusted and professional extension builder in BH15. Experienced in all extension buildering work and keeping within budget and on quote. MDW KITCHE...
From £17,532
BIRCHES CONSTRUCTION LTD are here to help customers who need an Extension Builder in BH15. We offer a competitive rate to complete all your extensi...
From £17,076
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,492
Experienced extension builder ready to quote for your work. Nevil Rose is the best extension builder in BH15. No obligation free quotes and many ha...
From £17,716
Trusted and professional extension builder in BH15. Experienced in all extension buildering work and keeping within budget and on quote. Hayes Land...
From £17,724
Trusted and professional extension builder in BH15. Experienced in all extension buildering work and keeping within budget and on quote. WR WARREN ...
From £17,620
Experienced extension builder ready to quote for your work. JOSCELYNE BUILDERS is the best extension builder in BH15. No obligation free quotes and...
From £17,724
Elmer Building Services ltd is an established extension buildering business in BH15. We come highly recommended and provide competitive quotes for ...

Underpinning ranges from £17,076 (ALWYN DOMINEY based in BH12) to £18,084 (RNTP ltd based in BH14), 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 BH15 by posting a job with HaMuch and we will send it to extension builders in BH15.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Poole | £38 | £250 |
| Underpin A Building near Bournemouth | £38 | £257 |
| Underpin A Building near Christchurch | £36 | £251 |
| Underpin A Building near New Forest | £32 | £245 |
| Underpin A Building near Dorchester | £30 | £230 |
| Underpin A Building near Weymouth | £33 | £260 |
| Underpin A Building near Totton | £34 | £243 |
| Underpin A Building near Salisbury | £35 | £247 |
| Underpin A Building near Romsey | £32 | £230 |
| Underpin A Building near Southampton | £34 | £243 |
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 - £17,616

Two storey extension - £88,174

Build a timber frame extension - £26,116

Build a swimming pool - £81,116

Single storey extension - £57,320

Side return extension - £42,805

Install an RSJ - £2,316

Outbuilding - £10,116

Build a Mansard loft conversion - £52,116

Loft conversion - £34,838

Build a kitchen extension - £42,116

Hip to gable loft conversion - £42,116

Granny annexe - £87,116

Garden office - £10,116

Convert a Garage - £16,116

Garage - £18,616

Build a flat roof extension - £22,116

Build a dormer loft conversion - £42,116

Concrete foundations - £6,366

Convert a bungalow loft - £29,116

Convert a basement - £38,805