From £17,244
Trusted and professional extension builder in CT21. Experienced in all extension buildering work and keeping within budget and on quote. Stade Stre...
From £17,340
Trusted and professional extension builder in CT21. Experienced in all extension buildering work and keeping within budget and on quote. Sprinks Co...
From £17,276
Tom Clark - Raison Home UK is a trusted extension builder serving customers in CT21 and the surrounding area. Contact us to today to get a competit...
From £17,436
Experienced extension builder ready to quote for your work. THE EAST CLIFF BUILDING CO LTD is the best extension builder in CT21. No obligation fre...
From £17,164
Pentland Homes is an established extension buildering business in CT21. We come highly recommended and provide competitive quotes for your work.
From £17,164
Experienced extension builder ready to quote for your work. Buildstead is the best extension builder in CT21. No obligation free quotes and many ha...
From £17,316
Relax... you have found a reliable extension builder in CT21. LEVEL CONSTRUCTION is a friendly and reliable company based in CT21 who consider no ...
From £17,236
Need an Extension Builder in CT21? M LONG T/A MJ BUILDINGS has been helping local clients (20 mile radius) with their extension buildering jobs for...
From £17,156
John Nicoll trained as a joiner and carpenter in St Andrew's, Fife. For over 30 years, he has been operating in the London area - setting up 5 Ways...
From £17,684
Goddard’s Home Improvement’s Ltd is a family-run business with over 16 years’ experience in the building industry. We know it can be hard to ...

Underpinning ranges from £17,156 (5 Ways Carpentry based in CT15) to £17,684 (Goddard’s Home Improvement’s Ltd based in TN28), 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 CT21 by posting a job with HaMuch and we will send it to extension builders in CT21.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Hythe | £31 | £228 |
| Underpin A Building near Folkestone | £31 | £233 |
| Underpin A Building near Ashford | £36 | £256 |
| Underpin A Building near Dover | £29 | £226 |
| Underpin A Building near Canterbury | £31 | £232 |
| Underpin A Building near Deal | £26 | £199 |
| Underpin A Building near Faversham | £34 | £235 |
| Underpin A Building near Whitstable | £28 | £214 |
| Underpin A Building near Herne Bay | £28 | £213 |
| Underpin A Building near Swale | £35 | £241 |
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 - £17,302

Two storey extension - £87,702

Build a timber frame extension - £25,802

Build a swimming pool - £80,802

Single storey extension - £51,032

Side return extension - £39,268

Install an RSJ - £2,002

Outbuilding - £9,802

Build a Mansard loft conversion - £51,802

Loft conversion - £31,890

Build a kitchen extension - £41,802

Hip to gable loft conversion - £41,802

Granny annexe - £86,802

Garden office - £9,802

Convert a Garage - £15,802

Garage - £18,302

Build a flat roof extension - £21,802

Build a dormer loft conversion - £41,802

Concrete foundations - £6,052

Convert a bungalow loft - £28,802

Convert a basement - £35,268