From £17,852
All Build Developments was established in 2012 by Joseph Cole. Since that day we have prided ourselves on the quality of service we provide across ...
From £17,764
Need an Extension Builder in BH1? AKT Roofing Ltd has been helping local clients (20 mile radius) with their extension buildering jobs for many yea...
From £17,724
Experienced extension builder ready to quote for your work. Fiona Interior Designer is the best extension builder in BH1. No obligation free quotes...
From £17,468
Trusted and professional extension builder in BH1. Experienced in all extension buildering work and keeping within budget and on quote. B.Hunter ha...
From £17,876
We have over 20 years experience, delivering projects on time with exceptional effort into the quality of our work. Over the years we have perfecte...
From £17,508
Revo Home Improvements is a trusted extension builder serving customers in BH1 and the surrounding area. Contact us to today to get a competitive q...
From £17,308
Sky Builders is a trusted extension builder serving customers in BH1 and the surrounding area. Contact us to today to get a competitive quote for e...
From £17,444
Experienced extension builder ready to quote for your work. C&M Roofing is the best extension builder in BH1. No obligation free quotes and many ha...
From £17,348
We believe that No Job Is Too Big or Too Small. From a dripping tap or blocked gutter to a full kitchen or bathroom design and installation our tec...
From £17,724
Relax... you have found a reliable extension builder in BH1. Colmar Construction Poole is a friendly and reliable company based in BH1 who consider...

Underpinning ranges from £17,308 (Sky Builders based in BH8) to £17,876 (A Q Roofing & Lofts Ltd based in BH8), 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 BH1 by posting a job with HaMuch and we will send it to extension builders in BH1.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Bournemouth | £33 | £221 |
| Underpin A Building near Christchurch | £32 | £222 |
| Underpin A Building near Poole | £33 | £215 |
| Underpin A Building near New Forest | £28 | £211 |
| Underpin A Building near Totton | £30 | £216 |
| Underpin A Building near Southampton | £30 | £215 |
| Underpin A Building near Salisbury | £30 | £211 |
| Underpin A Building near Romsey | £28 | £203 |
| Underpin A Building near Isle of Wight | £29 | £206 |
| Underpin A Building near Dorchester | £26 | £201 |
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 - £17,602

Two storey extension - £88,152

Build a timber frame extension - £26,102

Build a swimming pool - £81,102

Single storey extension - £57,032

Side return extension - £42,643

Install an RSJ - £2,302

Outbuilding - £10,102

Build a Mansard loft conversion - £52,102

Loft conversion - £34,703

Build a kitchen extension - £42,102

Hip to gable loft conversion - £42,102

Granny annexe - £87,102

Garden office - £10,102

Convert a Garage - £16,102

Garage - £18,602

Build a flat roof extension - £22,102

Build a dormer loft conversion - £42,102

Concrete foundations - £6,352

Convert a bungalow loft - £29,102

Convert a basement - £38,643