Need an Extension Builder in Biggleswade? WILLMOTT DIXON CONSTRUCTION LI has been helping local clients (20 mile radius) with their extension build...
Need an Extension Builder in Biggleswade? R&J Building Services Ltd has been helping local clients (20 mile radius) with their extension buildering...
Need an Extension Builder in Biggleswade? M SPINDLER CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension builderi...
Biggleswade, SG18
TCL BUILDING SOLUTIONS LTD are here to help customers who need an Extension Builder in Biggleswade. We offer a competitive rate to complete all you...
From £17,620
James Hogbourne
For more than 10 years, North Hertfordshire Construction LTD have been the name you can trust when it comes to building and development! We are kno...
From £17,860
Experienced extension builder ready to quote for your work. Specialist Building Refurbishm is the best extension builder in Biggleswade. No obligat...
From £17,772
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,828
Our building services company David Douglas Developments has over 30 years’ experience, and built an established reputation of providing customer...
From £17,812
Experienced extension builder ready to quote for your work. Bricklayers is the best extension builder in Biggleswade. No obligation free quotes and...
From £17,668
Relax... you have found a reliable extension builder in Biggleswade. Imogen Jack is a friendly and reliable company based in Biggleswade who consid...

Underpinning ranges from £17,348 (R&J Building Services Ltd based in SG17) to £17,988 (M SPINDLER CONSTRUCTION LTD based in SG6), 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 Biggleswade by posting a job with HaMuch and we will send it to extension builders in Biggleswade.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Biggleswade | £41 | £268 |
| Underpin A Building near Letchworth | £44 | £283 |
| Underpin A Building near North Hertfordshire | £44 | £283 |
| 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 |
| Underpin A Building near Ampthill | £38 | £258 |
| Underpin A Building near St Neots | £51 | £318 |
| Underpin A Building near Hitchin | £43 | £283 |
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 - £17,730

Two storey extension - £88,344

Build a timber frame extension - £26,230

Build a swimming pool - £81,230

Single storey extension - £59,592

Side return extension - £44,083

Install an RSJ - £2,430

Outbuilding - £10,230

Build a Mansard loft conversion - £52,230

Loft conversion - £35,903

Build a kitchen extension - £42,230

Hip to gable loft conversion - £42,230

Granny annexe - £87,230

Garden office - £10,230

Convert a Garage - £16,230

Garage - £18,730

Build a flat roof extension - £22,230

Build a dormer loft conversion - £42,230

Concrete foundations - £6,480

Convert a bungalow loft - £29,230

Convert a basement - £40,083