From £17,292
T Porter Buiding is an established and experienced local extension builder in Avonmouth. Please contact us for a free, no obligation quote and comp...
From £17,132
Relax... you have found a reliable extension builder in Avonmouth. Charles Marshall Contracting Ltd is a friendly and reliable company based in Avo...
From £17,260
Sharif General Builder is an established and experienced local extension builder in Avonmouth. Please contact us for a free, no obligation quote an...
From £16,700
Very reliable honest and hard working guarantee all work clean and tidy first class work
From £17,380
Looking for an Extension Builder near Avonmouth for all your extension buildering jobs?
Piotr Building & Decorations ...
From £17,652
MOBILE .... 07901 808 028 EMAIL .... angel201665@
From £17,372
New Haven Construction Group Ltd is an established extension buildering business in Avonmouth. We come highly recommended and provide competitive q...
From £17,684
Need to find an Extension Builder near you for all your extension buildering work?
WILSONS BUILDERS CO LTD provides a local, trusted extens...
From £17,380
Relax... you have found a reliable extension builder in Avonmouth. A M I Construction is a friendly and reliable company based in Avonmouth who con...
From £17,252
Concept Solutions Bristol Ltd is an established and experienced local extension builder in Avonmouth. Please contact us for a free, no obligation q...

Underpinning ranges from £16,700 (A.Gaddarn Builders based in NP11) to £17,684 (WILSONS BUILDERS CO LTD based in GL12), 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 Avonmouth by posting a job with HaMuch and we will send it to extension builders in Avonmouth.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Portishead | £33 | £247 |
| Underpin A Building near Clifton | £33 | £255 |
| Underpin A Building near Bristol | £33 | £255 |
| Underpin A Building near Bradley Stoke | £34 | £259 |
| Underpin A Building near Kingswood | £34 | £257 |
| Underpin A Building near Clevedon | £32 | £243 |
| Underpin A Building near North Somerset | £32 | £245 |
| Underpin A Building near South Gloucestershire | £34 | £260 |
| Underpin A Building near Keynsham | £33 | £251 |
| Underpin A Building near Yate | £34 | £263 |
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 - £17,310

Two storey extension - £87,716

Build a timber frame extension - £25,810

Build a swimming pool - £80,810

Single storey extension - £51,208

Side return extension - £39,367

Install an RSJ - £2,010

Outbuilding - £9,810

Build a Mansard loft conversion - £51,810

Loft conversion - £31,973

Build a kitchen extension - £41,810

Hip to gable loft conversion - £41,810

Granny annexe - £86,810

Garden office - £9,810

Convert a Garage - £15,810

Garage - £18,310

Build a flat roof extension - £21,810

Build a dormer loft conversion - £41,810

Concrete foundations - £6,060

Convert a bungalow loft - £28,810

Convert a basement - £35,367