From £17,404
HOLBROOK CONSTRUCTION are here to help customers who need an Extension Builder in Keynsham. We offer a competitive rate to complete all your extens...
From £17,436
Need an Extension Builder in Keynsham? Just Plastered has been helping local clients (20 mile radius) with their extension buildering jobs for many...
From £17,372
Relax... you have found a reliable extension builder in Keynsham. Uks is a friendly and reliable company based in Keynsham who consider no job as t...
From £17,652
MOBILE .... 07901 808 028 EMAIL .... angel201665@
From £17,260
Relax... you have found a reliable extension builder in Keynsham. ASHWIN CONSTRUCTION is a friendly and reliable company based in Keynsham who cons...
From £17,740
M L BUILDING SERVICES are here to help customers who need an Extension Builder in Keynsham. We offer a competitive rate to complete all your extens...
From £17,412
Vears Decorating Limited was established in 1993 and since then has gained extensive experience with decorating all types and styles of properties,...
From £17,276
Relax... you have found a reliable extension builder in Keynsham. MSH Construction (Bristol) Ltd is a friendly and reliable company based in Keynsh...
From £17,652
J GREEN PLASTERING LTD are here to help customers who need an Extension Builder in Keynsham. We offer a competitive rate to complete all your exten...
From £17,660
S JOYCE BUILDING are here to help customers who need an Extension Builder in Keynsham. We offer a competitive rate to complete all your extension b...

Underpinning ranges from £17,260 (ASHWIN CONSTRUCTION based in BS30) to £17,740 (M L BUILDING SERVICES based in BS14), 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 Keynsham by posting a job with HaMuch and we will send it to extension builders in Keynsham.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Keynsham | £33 | £251 |
| Underpin A Building near Kingswood | £34 | £257 |
| Underpin A Building near Bristol | £33 | £255 |
| Underpin A Building near Bath | £32 | £249 |
| Underpin A Building near Clifton | £33 | £255 |
| Underpin A Building near South Gloucestershire | £34 | £260 |
| Underpin A Building near Yate | £34 | £263 |
| Underpin A Building near Bradley Stoke | £34 | £259 |
| Underpin A Building near Portishead | £33 | £247 |
| Underpin A Building near North Somerset | £32 | £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 - £17,486

Two storey extension - £87,980

Build a timber frame extension - £25,986

Build a swimming pool - £80,986

Single storey extension - £54,728

Side return extension - £41,347

Install an RSJ - £2,186

Outbuilding - £9,986

Build a Mansard loft conversion - £51,986

Loft conversion - £33,623

Build a kitchen extension - £41,986

Hip to gable loft conversion - £41,986

Granny annexe - £86,986

Garden office - £9,986

Convert a Garage - £15,986

Garage - £18,486

Build a flat roof extension - £21,986

Build a dormer loft conversion - £41,986

Concrete foundations - £6,236

Convert a bungalow loft - £28,986

Convert a basement - £37,347