From £17,692
Need an Extension Builder in NN7? Catling Building Services Ltd has been helping local clients (20 mile radius) with their extension buildering job...
From £17,612
Need to find an Extension Builder near you for all your extension buildering work?
The Builders - Northampton Limited provides a local, tru...
From £17,692
Relax... you have found a reliable extension builder in NN7. Wright Building is a friendly and reliable company based in NN7 who consider no job as...
From £17,212
Need an Extension Builder in NN7? Twelftree Builders has been helping local clients (20 mile radius) with their extension buildering jobs for many ...
From £17,356
ab construction has been trading for over 40 years we undertake all building works from modernisations to extensions and new builds drives patios a...
From £17,228
ATJ BUILDING & GROUNDWORKS is a trusted extension builder serving customers in NN7 and the surrounding area. Contact us to today to get a competiti...
From £17,436
L.D.Design&Build means a holistic approach to building, one simple way of finding everything you need for your building project under the ‘same r...
From £17,372
Need an Extension Builder in NN7? DAB & K&G Building Services has been helping local clients (20 mile radius) with their extension buildering jobs ...
From £17,484
Need to find an Extension Builder near you for all your extension buildering work?
Picking your Local Builder provides a local, trusted ext...
From £17,116
Brickwork specialist with 30 years experience.
From repointing, small repairs up to building extensions and houses.
Stonework...

Underpinning ranges from £17,116 (GW BUILDERS based in NN2) to £17,692 (Catling Building Services Ltd based in NN4), 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 NN7 by posting a job with HaMuch and we will send it to extension builders in NN7.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Northampton | £35 | £239 |
| Underpin A Building near Daventry | £31 | £230 |
| Underpin A Building near Wellingborough | £39 | £251 |
| Underpin A Building near Milton Keynes | £39 | £263 |
| Underpin A Building near Rushden | £34 | £231 |
| Underpin A Building near Kettering | £34 | £237 |
| Underpin A Building near Bletchley | £39 | £265 |
| Underpin A Building near Rugby | £31 | £224 |
| Underpin A Building near Market Harborough | £31 | £217 |
| 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 - £17,420

Two storey extension - £87,880

Build a timber frame extension - £25,920

Build a swimming pool - £80,920

Single storey extension - £53,400

Side return extension - £40,600

Install an RSJ - £2,120

Outbuilding - £9,920

Build a Mansard loft conversion - £51,920

Loft conversion - £33,000

Build a kitchen extension - £41,920

Hip to gable loft conversion - £41,920

Granny annexe - £86,920

Garden office - £9,920

Convert a Garage - £15,920

Garage - £18,420

Build a flat roof extension - £21,920

Build a dormer loft conversion - £41,920

Concrete foundations - £6,170

Convert a bungalow loft - £28,920

Convert a basement - £36,600