Alan Hicks
Need to find an Extension Builder near you for all your extension buildering work?
A G Hicks Building Services provides a local, trusted ex...
Need to find an Extension Builder near you for all your extension buildering work?
Picking your Local Builder provides a local, trusted ext...
Trusted and professional extension builder in NN2. Experienced in all extension buildering work and keeping within budget and on quote. Northants G...
Walsh Builders Ltd is an established and experienced local extension builder in NN2. Please contact us for a free, no obligation quote and competit...
M Home Renovations is an established extension buildering business in NN2. We come highly recommended and provide competitive quotes for your work....
Relax... you have found a reliable extension builder in NN2. Wright Building is a friendly and reliable company based in NN2 who consider no job as...
Need an Extension Builder in NN2? DAB & K&G Building Services has been helping local clients (20 mile radius) with their extension buildering jobs ...
Samrai Associates was founded by Hars Samrai in Northampton in order to provide clients with a prompt and robust Architectural Service. Over time m...
Need an Extension Builder in NN2? Catling Building Services Ltd has been helping local clients (20 mile radius) with their extension buildering job...
Neil Donlevy
Need to find an Extension Builder near you for all your extension buildering work?
The Builders - Northampton Limited provides a local, tru...

Underpinning ranges from £17,044 (A G Hicks Building Services based in NN3) to £17,748 (Samrai Associates Limited based in NN3), 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 NN2 by posting a job with HaMuch and we will send it to extension builders in NN2.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Northampton | £35 | £239 |
| Underpin A Building near Wellingborough | £39 | £251 |
| Underpin A Building near Daventry | £31 | £230 |
| Underpin A Building near Kettering | £34 | £237 |
| Underpin A Building near Rushden | £34 | £231 |
| Underpin A Building near Market Harborough | £31 | £217 |
| Underpin A Building near Milton Keynes | £39 | £263 |
| Underpin A Building near Rugby | £31 | £224 |
| Underpin A Building near Corby | £30 | £214 |
| Underpin A Building near Bedford | £45 | £278 |
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 - £17,457

Two storey extension - £87,935

Build a timber frame extension - £25,957

Build a swimming pool - £80,957

Single storey extension - £54,136

Side return extension - £41,014

Install an RSJ - £2,157

Outbuilding - £9,957

Build a Mansard loft conversion - £51,957

Loft conversion - £33,345

Build a kitchen extension - £41,957

Hip to gable loft conversion - £41,957

Granny annexe - £86,957

Garden office - £9,957

Convert a Garage - £15,957

Garage - £18,457

Build a flat roof extension - £21,957

Build a dormer loft conversion - £41,957

Concrete foundations - £6,207

Convert a bungalow loft - £28,957

Convert a basement - £37,014