Yeoman Building Contractors are here to help customers who need an Extension Builder in TN6. We offer a competitive rate to complete all your exten...
LEWIS BUILDING SERVICES is an established and experienced local extension builder in TN6. Please contact us for a free, no obligation quote and com...
From £17,660
Trusted and professional extension builder in TN6. Experienced in all extension buildering work and keeping within budget and on quote. Acer Buildi...
From £17,620
County Line is an established and experienced local extension builder in TN6. Please contact us for a free, no obligation quote and competitive rat...
From £17,428
Experienced extension builder ready to quote for your work. Red Square Design and Build Ltd is the best extension builder in TN6. No obligation fre...

Underpinning ranges from £17,428 (Red Square Design and Build Ltd based in TN3) to £17,660 (Acer Building Services Ltd based in TN6), 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 TN6 by posting a job with HaMuch and we will send it to extension builders in TN6.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Crowborough | £36 | £258 |
| Underpin A Building near Wealden | £35 | £256 |
| Underpin A Building near Tunbridge Wells | £37 | £258 |
| Underpin A Building near East Grinstead | £37 | £259 |
| Underpin A Building near Tonbridge | £38 | £254 |
| Underpin A Building near Haywards Heath | £35 | £256 |
| Underpin A Building near Mid Sussex | £35 | £261 |
| Underpin A Building near Hailsham | £31 | £243 |
| Underpin A Building near Burgess Hill | £36 | £240 |
| Underpin A Building near Crawley | £38 | £255 |
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 - £17,551

Two storey extension - £88,077

Build a timber frame extension - £26,051

Build a swimming pool - £81,051

Single storey extension - £56,024

Side return extension - £42,076

Install an RSJ - £2,251

Outbuilding - £10,051

Build a Mansard loft conversion - £52,051

Loft conversion - £34,230

Build a kitchen extension - £42,051

Hip to gable loft conversion - £42,051

Granny annexe - £87,051

Garden office - £10,051

Convert a Garage - £16,051

Garage - £18,551

Build a flat roof extension - £22,051

Build a dormer loft conversion - £42,051

Concrete foundations - £6,301

Convert a bungalow loft - £29,051

Convert a basement - £38,076