From £17,748
J & N Contracts Cambs Ltd is an established and experienced local extension builder in CB23. Please contact us for a free, no obligation quote and ...
From £17,668
Based in Cambridgeshire James Burch Roofing specialises in flat roofing in felt and single ply membranes. For the past 10 years we have worked thro...
From £17,772
Trusted and professional extension builder in CB23. Experienced in all extension buildering work and keeping within budget and on quote. IJC Buildi...
From £17,628
Need an Extension Builder in CB23? Baufritz (UK) Limited has been helping local clients (20 mile radius) with their extension buildering jobs for m...
From £17,476
Need an Extension Builder in CB23? SturdyBuild has been helping local clients (20 mile radius) with their extension buildering jobs for many years....
From £17,732
WESTWICK BUILDERS LIMITED is an established extension buildering business in CB23. We come highly recommended and provide competitive quotes for yo...
From £17,908
Need to find an Extension Builder near you for all your extension buildering work?
Louise Swarbrick Design provides a local, trusted extens...
From £17,716
M OLIVER BUILDING is an established and experienced local extension builder in CB23. Please contact us for a free, no obligation quote and competit...
From £17,884
Comprehensive, Intelligent Construction Service offering Domestic and Commercial Buildings, Barn, Basement and Loft Conversions, Renovation & Refur...
From £17,652
Relax... you have found a reliable extension builder in CB23. CROWNBUILD is a friendly and reliable company based in CB23 who consider no job as to...

Underpinning ranges from £17,476 (SturdyBuild based in CB3) to £17,908 (Louise Swarbrick Design based in CB3), 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 CB23 by posting a job with HaMuch and we will send it to extension builders in CB23.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near South Cambridgeshire | £43 | £305 |
| Underpin A Building near Cambridge | £38 | £271 |
| Underpin A Building near St Neots | £51 | £318 |
| Underpin A Building near Huntingdon | £38 | £284 |
| Underpin A Building near Biggleswade | £41 | £268 |
| Underpin A Building near Huntingdonshire | £36 | £290 |
| Underpin A Building near Ely | £40 | £279 |
| Underpin A Building near Letchworth | £44 | £283 |
| Underpin A Building near North Hertfordshire | £44 | £283 |
| Underpin A Building near South Bedfordshire | £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 - £17,718

Two storey extension - £88,328

Build a timber frame extension - £26,218

Build a swimming pool - £81,218

Single storey extension - £59,368

Side return extension - £43,957

Install an RSJ - £2,418

Outbuilding - £10,218

Build a Mansard loft conversion - £52,218

Loft conversion - £35,798

Build a kitchen extension - £42,218

Hip to gable loft conversion - £42,218

Granny annexe - £87,218

Garden office - £10,218

Convert a Garage - £16,218

Garage - £18,718

Build a flat roof extension - £22,218

Build a dormer loft conversion - £42,218

Concrete foundations - £6,468

Convert a bungalow loft - £29,218

Convert a basement - £39,957