From £17,700
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,700
Relax... you have found a reliable extension builder in MK40. R G BUILDERS UK LTD is a friendly and reliable company based in MK40 who consider no ...
From £17,828
Need an Extension Builder in MK40? Custom Construction (UK) Ltd has been helping local clients (20 mile radius) with their extension buildering job...
From £18,524
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,948
Relax... you have found a reliable extension builder in MK40. Bench Mark Construction is a friendly and reliable company based in MK40 who consider...
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 £17,804
Our building services company MH Building have a combined thirty-five years of experience and have been helping customers in Bedfordshire and the s...
From £17,748
RS Plumbing and Heating is a trusted extension builder serving customers in MK40 and the surrounding area. Contact us to today to get a competitive...
From £17,380
Experienced extension builder ready to quote for your work. Cousins Builders Ltd is the best extension builder in MK40. No obligation free quotes a...
From £17,124
Trusted and professional extension builder in MK40. Experienced in all extension buildering work and keeping within budget and on quote. K FREEMAN ...

Underpinning ranges from £17,124 (K FREEMAN BUILDERS LIMITED based in MK43) to £18,524 (J K L Building Contractors Ltd 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 MK40 by posting a job with HaMuch and we will send it to extension builders in MK40.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near South Bedfordshire | £45 | £278 |
| Underpin A Building near Bedford | £45 | £278 |
| Underpin A Building near Kempston | £44 | £273 |
| Underpin A Building near Ampthill | £38 | £258 |
| Underpin A Building near Mid Bedfordshire | £42 | £276 |
| Underpin A Building near Biggleswade | £41 | £268 |
| Underpin A Building near St Neots | £51 | £318 |
| Underpin A Building near Rushden | £34 | £231 |
| Underpin A Building near Milton Keynes | £39 | £263 |
| Underpin A Building near Bletchley | £39 | £265 |
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 - £17,806

Two storey extension - £88,460

Build a timber frame extension - £26,306

Build a swimming pool - £81,306

Single storey extension - £61,128

Side return extension - £44,947

Install an RSJ - £2,506

Outbuilding - £10,306

Build a Mansard loft conversion - £52,306

Loft conversion - £36,623

Build a kitchen extension - £42,306

Hip to gable loft conversion - £42,306

Granny annexe - £87,306

Garden office - £10,306

Convert a Garage - £16,306

Garage - £18,806

Build a flat roof extension - £22,306

Build a dormer loft conversion - £42,306

Concrete foundations - £6,556

Convert a bungalow loft - £29,306

Convert a basement - £40,947