From £17,308
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 BH24? Accolade Building Care Ltd. T/A ABC has been helping local clients (20 mile radius) with their extension builder...
From £17,660
We design, build and renovate to the highest standard. Our team of revolutionaries is dedicated to realising your passion and making your vision ou...
From £17,668
Builder ToGoTo is an established and experienced local extension builder in BH24. Please contact us for a free, no obligation quote and competitive...
From £17,364
All Build Construction Services is an established and experienced local extension builder in BH24. Please contact us for a free, no obligation quot...
From £17,644
Need to find an Extension Builder near you for all your extension buildering work?
MILESTONE BUILDING CONTRACTORS provides a local, trusted...
From £17,660
Need to find an Extension Builder near you for all your extension buildering work?
J.V MARSTON BUILDERS provides a local, trusted extension...
From £18,700
Building extensions and conversions - commercial and domesticstructural repairsgroundworksdrainage workspaving, patios and concreti...
From £17,724
Elmer Building Services ltd is an established extension buildering business in BH24. We come highly recommended and provide competitive quotes for ...
From £17,340
Relax... you have found a reliable extension builder in BH24. First Alpha Home Improvements Ltd is a friendly and reliable company based in BH24 wh...

Underpinning ranges from £17,308 (ACCOLADE BUILDING CARE LIMITED based in BH24) to £18,700 (Wade and Son Builders based in bh22), 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 BH24 by posting a job with HaMuch and we will send it to extension builders in BH24.
| 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 Poole | £38 | £250 |
| 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 |
| Underpin A Building near Eastleigh | £34 | £244 |
| Underpin A Building near Chandler's Ford | £34 | £245 |
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 - £17,660

Two storey extension - £88,240

Build a timber frame extension - £26,160

Build a swimming pool - £81,160

Single storey extension - £58,200

Side return extension - £43,300

Install an RSJ - £2,360

Outbuilding - £10,160

Build a Mansard loft conversion - £52,160

Loft conversion - £35,250

Build a kitchen extension - £42,160

Hip to gable loft conversion - £42,160

Granny annexe - £87,160

Garden office - £10,160

Convert a Garage - £16,160

Garage - £18,660

Build a flat roof extension - £22,160

Build a dormer loft conversion - £42,160

Concrete foundations - £6,410

Convert a bungalow loft - £29,160

Convert a basement - £39,300