From £18,860
Experienced extension builder ready to quote for your work. ALLIED BUILDING ASSOCIATES LTD is the best extension builder in CB22. No obligation fre...
From £17,716
Trusted and professional extension builder in CB22. Experienced in all extension buildering work and keeping within budget and on quote. DEBRAY BUI...
From £17,844
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,884
Comprehensive, Intelligent Construction Service offering Domestic and Commercial Buildings, Barn, Basement and Loft Conversions, Renovation & Refur...
From £17,436
TSN Consultants Ltd are here to help customers who need an Extension Builder in CB22. We offer a competitive rate to complete all your extension bu...
From £17,876
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,572
Relax... you have found a reliable extension builder in CB22. D Stebbings is a friendly and reliable company based in CB22 who consider no job as t...
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 £17,652
Relax... you have found a reliable extension builder in CB22. CROWNBUILD is a friendly and reliable company based in CB22 who consider no job as to...
From £17,572
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £17,436 (TSN Consultants Ltd based in CB1) to £18,860 (ALLIED BUILDING ASSOCIATES LTD based in CB22), 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 CB22 by posting a job with HaMuch and we will send it to extension builders in CB22.
| 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 Haverhill | £37 | £260 |
| Underpin A Building near Biggleswade | £41 | £268 |
| Underpin A Building near East Hertfordshire | £44 | £289 |
| Underpin A Building near Letchworth | £44 | £283 |
| Underpin A Building near St Neots | £51 | £318 |
| Underpin A Building near Ely | £40 | £279 |
| Underpin A Building near North Hertfordshire | £44 | £283 |
| Underpin A Building near Bishop's Stortford | £42 | £264 |
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 - £17,832

Two storey extension - £88,498

Build a timber frame extension - £26,332

Build a swimming pool - £81,332

Single storey extension - £61,640

Side return extension - £45,235

Install an RSJ - £2,532

Outbuilding - £10,332

Build a Mansard loft conversion - £52,332

Loft conversion - £36,863

Build a kitchen extension - £42,332

Hip to gable loft conversion - £42,332

Granny annexe - £87,332

Garden office - £10,332

Convert a Garage - £16,332

Garage - £18,832

Build a flat roof extension - £22,332

Build a dormer loft conversion - £42,332

Concrete foundations - £6,582

Convert a bungalow loft - £29,332

Convert a basement - £41,235