From £17,596
Need to find an Extension Builder near you for all your extension buildering work?
Fast Affordable Builders provides a local, trusted exten...
From £17,420
Modularr is an established and experienced local extension builder in CT4. Please contact us for a free, no obligation quote and competitive rates....
From £17,884
MWM CARPENTRY LTD is a trusted extension builder serving customers in CT4 and the surrounding area. Contact us to today to get a competitive quote ...
From £17,316
Relax... you have found a reliable extension builder in CT4. LEVEL CONSTRUCTION is a friendly and reliable company based in CT4 who consider no jo...
From £17,388
Trusted and professional extension builder in CT4. Experienced in all extension buildering work and keeping within budget and on quote. SMB Builder...
From £17,164
Pentland Homes is an established extension buildering business in CT4. We come highly recommended and provide competitive quotes for your work.
...From £17,436
Experienced extension builder ready to quote for your work. THE EAST CLIFF BUILDING CO LTD is the best extension builder in CT4. No obligation free...
From £17,748
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £16,556
35 years in the trade can Lay bricks plaster roofing wall and floor tiling
From £17,436
ARIA DESIGN & BUILD is an established extension buildering business in CT4. We come highly recommended and provide competitive quotes for your work...

Underpinning ranges from £16,556 (S MEGSON CONSTRUCTION based in CT5) to £17,884 (MWM CARPENTRY LTD based in TN25), 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 CT4 by posting a job with HaMuch and we will send it to extension builders in CT4.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Canterbury | £28 | £211 |
| Underpin A Building near Whitstable | £24 | £184 |
| Underpin A Building near Faversham | £31 | £211 |
| Underpin A Building near Herne Bay | £24 | £184 |
| Underpin A Building near Folkestone | £27 | £203 |
| Underpin A Building near Hythe | £27 | £196 |
| Underpin A Building near Ashford | £30 | £213 |
| Underpin A Building near Dover | £25 | £199 |
| Underpin A Building near Swale | £31 | £214 |
| Underpin A Building near Deal | £22 | £174 |
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 - £17,394

Two storey extension - £87,842

Build a timber frame extension - £25,894

Build a swimming pool - £80,894

Single storey extension - £52,888

Side return extension - £40,312

Install an RSJ - £2,094

Outbuilding - £9,894

Build a Mansard loft conversion - £51,894

Loft conversion - £32,760

Build a kitchen extension - £41,894

Hip to gable loft conversion - £41,894

Granny annexe - £86,894

Garden office - £9,894

Convert a Garage - £15,894

Garage - £18,394

Build a flat roof extension - £21,894

Build a dormer loft conversion - £41,894

Concrete foundations - £6,144

Convert a bungalow loft - £28,894

Convert a basement - £36,312