From £17,732
If you are looking for a Cosgrove extension builder and you need something replaced, fitted, or fixed, contact Space Above Limited today. We are co...
From £17,748
RS Plumbing and Heating is a trusted extension builder serving customers in Cosgrove and the surrounding area. Contact us to today to get a competi...
From £17,948
Relax... you have found a reliable extension builder in Cosgrove. Bench Mark Construction is a friendly and reliable company based in Cosgrove who ...
From £18,308
Need to find an Extension Builder near you for all your extension buildering work?
A M Interiors provides a local, trusted extension builde...
From £17,612
JASON SHARP SHARP BUILDERS is a trusted extension builder serving customers in Cosgrove and the surrounding area. Contact us to today to get a comp...
From £17,044
Need to find an Extension Builder near you for all your extension buildering work?
A G Hicks Building Services provides a local, trusted ex...
From £17,820
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,452
Relax... you have found a reliable extension builder in Cosgrove. Dean Prichard Building Services is a friendly and reliable company based in Cosgr...
From £17,724
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,540
Trusted and professional extension builder in Cosgrove. Experienced in all extension buildering work and keeping within budget and on quote. Langto...

Underpinning ranges from £17,044 (A G Hicks Building Services based in NN3) to £18,308 (A M Interiors based in MK42), 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 Cosgrove by posting a job with HaMuch and we will send it to extension builders in Cosgrove.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Milton Keynes | £39 | £263 |
| Underpin A Building near Bletchley | £39 | £265 |
| Underpin A Building near Northampton | £35 | £239 |
| Underpin A Building near Aylesbury Vale | £36 | £246 |
| Underpin A Building near Leighton Buzzard | £38 | £270 |
| Underpin A Building near Ampthill | £38 | £258 |
| Underpin A Building near Kempston | £44 | £273 |
| Underpin A Building near Bedford | £45 | £278 |
| Underpin A Building near South Bedfordshire | £45 | £278 |
| Underpin A Building near Mid Bedfordshire | £42 | £276 |
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 - £17,693

Two storey extension - £88,289

Build a timber frame extension - £26,193

Build a swimming pool - £81,193

Single storey extension - £58,856

Side return extension - £43,669

Install an RSJ - £2,393

Outbuilding - £10,193

Build a Mansard loft conversion - £52,193

Loft conversion - £35,558

Build a kitchen extension - £42,193

Hip to gable loft conversion - £42,193

Granny annexe - £87,193

Garden office - £10,193

Convert a Garage - £16,193

Garage - £18,693

Build a flat roof extension - £22,193

Build a dormer loft conversion - £42,193

Concrete foundations - £6,443

Convert a bungalow loft - £29,193

Convert a basement - £39,669