From £17,620
Advance Shutters Ltd is an established and experienced local extension builder in BH25. Please contact us for a free, no obligation quote and compe...
From £17,444
GOTHIC CONSTRUCTION LTD is an established and experienced local extension builder in BH25. Please contact us for a free, no obligation quote...
From £17,652
Relax... you have found a reliable extension builder in BH25. 3Lance Developments Limited is a friendly and reliable company based in BH25 who cons...
From £17,572
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,532
Need an Extension Builder in BH25? NIXOR Design and Build has been helping local clients (20 mile radius) with their extension buildering jobs for ...
From £17,444
Experienced extension builder ready to quote for your work. H H Builders is the best extension builder in BH25. No obligation free quotes and many ...
From £17,380
LIMITLESS is a dynamic UK based Construction Consultancy based in Hampshire. We provide clients with a wide range of services across multiple secto...
From £17,340
Relax... you have found a reliable extension builder in BH25. First Alpha Home Improvements Ltd is a friendly and reliable company based in BH25 wh...
From £17,724
Elmer Building Services ltd is an established extension buildering business in BH25. We come highly recommended and provide competitive quotes for ...

Underpinning ranges from £17,340 (First Alpha Home Improvements Ltd based in BH23) to £18,004 (Zeneli Builders based in BH23), 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 BH25 by posting a job with HaMuch and we will send it to extension builders in BH25.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Christchurch | £36 | £251 |
| Underpin A Building near New Forest | £32 | £245 |
| Underpin A Building near Bournemouth | £38 | £257 |
| Underpin A Building near Totton | £34 | £243 |
| Underpin A Building near Poole | £38 | £250 |
| Underpin A Building near Southampton | £34 | £243 |
| Underpin A Building near Isle of Wight | £34 | £246 |
| Underpin A Building near Locks Heath | £33 | £240 |
| Underpin A Building near Romsey | £32 | £230 |
| Underpin A Building near Hedge End | £34 | £244 |
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 - £17,571

Two storey extension - £88,107

Build a timber frame extension - £26,071

Build a swimming pool - £81,071

Single storey extension - £56,424

Side return extension - £42,301

Install an RSJ - £2,271

Outbuilding - £10,071

Build a Mansard loft conversion - £52,071

Loft conversion - £34,418

Build a kitchen extension - £42,071

Hip to gable loft conversion - £42,071

Granny annexe - £87,071

Garden office - £10,071

Convert a Garage - £16,071

Garage - £18,571

Build a flat roof extension - £22,071

Build a dormer loft conversion - £42,071

Concrete foundations - £6,321

Convert a bungalow loft - £29,071

Convert a basement - £38,301