Bristol Building Co.Ltd is an established and experienced local extension builder in Portishead. Please contact us for a free, no obligation quote ...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Need an Extension Builder in Portishead? Mucha Construcion has been helping local clients (20 mile radius) with their extension buildering jobs for...
Relax... you have found a reliable extension builder in Portishead. Bristol Brickworks is a friendly and reliable company based in Portishead who c...
A&L Building Services is an established and experienced local extension builder in Portishead. Please contact us for a free, no obligation quote an...
B ROBINSON BUILDING is an established and experienced local extension builder in Portishead. Please contact us for a free, no obligation quote and ...
Relax... you have found a reliable extension builder in Portishead. A M I Construction is a friendly and reliable company based in Portishead who c...
N J Laity & Son & Grandson's are here to help customers who need an Extension Builder in Portishead. We offer a competitive rate to complete all yo...
MOORLAND DESIGN & BUILD LTD are here to help customers who need an Extension Builder in Portishead. We offer a competitive rate to complete all you...
Neil Causon & Son is an established and experienced local extension builder in Portishead. Please contact us for a free, no obligation quote and co...

Underpinning ranges from £17,228 (Neil Causon & Son based in BS21) to £17,796 (N J Laity & Son & Grandson's based in BS10), 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 Portishead by posting a job with HaMuch and we will send it to extension builders in Portishead.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Portishead | £33 | £247 |
| Underpin A Building near Clevedon | £32 | £243 |
| Underpin A Building near Clifton | £33 | £255 |
| Underpin A Building near North Somerset | £32 | £245 |
| 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 Weston-super-Mare | £33 | £253 |
| Underpin A Building near Keynsham | £33 | £251 |
| Underpin A Building near South Gloucestershire | £34 | £260 |
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 - £17,509

Two storey extension - £88,013

Build a timber frame extension - £26,009

Build a swimming pool - £81,009

Single storey extension - £55,176

Side return extension - £41,599

Install an RSJ - £2,209

Outbuilding - £10,009

Build a Mansard loft conversion - £52,009

Loft conversion - £33,833

Build a kitchen extension - £42,009

Hip to gable loft conversion - £42,009

Granny annexe - £87,009

Garden office - £10,009

Convert a Garage - £16,009

Garage - £18,509

Build a flat roof extension - £22,009

Build a dormer loft conversion - £42,009

Concrete foundations - £6,259

Convert a bungalow loft - £29,009

Convert a basement - £37,599