From £17,436
Cranwells Construction is a trusted extension builder serving customers in TN17 and the surrounding area. Contact us to today to get a competitive ...
From £17,452
Grey Feather Ltd is an established extension buildering business in TN17. We come highly recommended and provide competitive quotes for your work.<...
From £17,420
Need to find an Extension Builder near you for all your extension buildering work?
Broardview Construction provides a local, trusted extens...
From £19,996
All my work is top class and I've taken pride in everything I do I will come and hire me
From £17,668
Experienced extension builder ready to quote for your work. S B V CONSTRUCTION LIMITED is the best extension builder in TN17. No obligation free qu...
From £17,668
Here at ICS Builders Ltd we are proud to serve as Rolvenden and the surrounding areas most trusted and esteemed local building firm. With ...
From £17,628
Trusted and professional extension builder in TN17. Experienced in all extension buildering work and keeping within budget and on quote. GRIFFIN GE...
From £18,164
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,596
Need to find an Extension Builder near you for all your extension buildering work?
The Sussex Bookcase Company provides a local, trusted ex...
From £17,716
Trusted and professional extension builder in TN17. Experienced in all extension buildering work and keeping within budget and on quote. Teamwork T...

Underpinning ranges from £17,420 (Broardview Construction based in TN12) to £19,996 (Transform Builders based in TN12), 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 TN17 by posting a job with HaMuch and we will send it to extension builders in TN17.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Maidstone | £40 | £255 |
| Underpin A Building near Tunbridge Wells | £37 | £258 |
| Underpin A Building near Tonbridge | £38 | £254 |
| Underpin A Building near Ashford | £36 | £256 |
| Underpin A Building near Larkfield | £41 | £253 |
| Underpin A Building near Wealden | £35 | £256 |
| Underpin A Building near Crowborough | £36 | £258 |
| Underpin A Building near Hastings | £31 | £246 |
| Underpin A Building near Bexhill-on-Sea | £31 | £243 |
| Underpin A Building near Sittingbourne | £35 | £246 |
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 - £17,874

Two storey extension - £88,562

Build a timber frame extension - £26,374

Build a swimming pool - £81,374

Single storey extension - £62,488

Side return extension - £45,712

Install an RSJ - £2,574

Outbuilding - £10,374

Build a Mansard loft conversion - £52,374

Loft conversion - £37,260

Build a kitchen extension - £42,374

Hip to gable loft conversion - £42,374

Granny annexe - £87,374

Garden office - £10,374

Convert a Garage - £16,374

Garage - £18,874

Build a flat roof extension - £22,374

Build a dormer loft conversion - £42,374

Concrete foundations - £6,624

Convert a bungalow loft - £29,374

Convert a basement - £41,712