From £17,316
Need to find an Extension Builder near you for all your extension buildering work?
Bourne Valley Group provides a local, trusted extension ...
From £17,308
Need to find an Extension Builder near you for all your extension buildering work?
G DANIEL BUILD & MAINT LTD provides a local, trusted ext...
From £17,556
Matrod Frampton Ltd are here to help customers who need an Extension Builder in BH21. We offer a competitive rate to complete all your extension bu...
From £17,588
Experienced extension builder ready to quote for your work. Aztech Design and Build is the best extension builder in BH21. No obligation free quote...
From £17,364
All Build Construction Services is an established and experienced local extension builder in BH21. Please contact us for a free, no obligation quot...
From £17,292
AUTOGRAPH CONSTRUCTION LTD is a trusted extension builder serving customers in BH21 and the surrounding area. Contact us to today to get a competit...
From £17,084
Total Building Creations is an established and experienced local extension builder in BH21. Please contact us for a free, no obligation quote and ...
From £17,764
Ankers & Rawlings Developments Ltd is an established extension buildering business in BH21. We come highly recommended and provide competitive quot...
From £17,676
Trusted and professional extension builder in BH21. Experienced in all extension buildering work and keeping within budget and on quote. MDW KITCHE...
From £17,772
yas is a trusted extension builder serving customers in BH21 and the surrounding area. Contact us to today to get a competitive quote for extension...

Underpinning ranges from £17,084 (Total Building Creations based in BH21) to £17,772 (Yas based in Bh17), 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 BH21 by posting a job with HaMuch and we will send it to extension builders in BH21.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Poole | £33 | £215 |
| Underpin A Building near Bournemouth | £33 | £221 |
| Underpin A Building near Christchurch | £32 | £222 |
| Underpin A Building near New Forest | £28 | £211 |
| Underpin A Building near Salisbury | £30 | £211 |
| Underpin A Building near Dorchester | £26 | £201 |
| Underpin A Building near Totton | £30 | £216 |
| Underpin A Building near Romsey | £28 | £203 |
| Underpin A Building near Weymouth | £28 | £221 |
| Underpin A Building near Southampton | £30 | £215 |
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 - £17,472

Two storey extension - £87,958

Build a timber frame extension - £25,972

Build a swimming pool - £80,972

Single storey extension - £54,440

Side return extension - £41,185

Install an RSJ - £2,172

Outbuilding - £9,972

Build a Mansard loft conversion - £51,972

Loft conversion - £33,488

Build a kitchen extension - £41,972

Hip to gable loft conversion - £41,972

Granny annexe - £86,972

Garden office - £9,972

Convert a Garage - £15,972

Garage - £18,472

Build a flat roof extension - £21,972

Build a dormer loft conversion - £41,972

Concrete foundations - £6,222

Convert a bungalow loft - £28,972

Convert a basement - £37,185