From £17,356
Need to find an Extension Builder near you for all your extension buildering work?
BUILDERS OF SUSSEX LTD provides a local, trusted extensi...
From £17,188
Family run builders with high standards of workmanship and customer service, trading standards approved.
From £17,748
GREEN ROOM CONSTRUCTION is an established and experienced local extension builder in BN22. Please contact us for a free, no obligation quote and co...
From £17,580
Livit Design&Build is a company serves people to renovate their bathrooms partially or from scratch. Livit Design&Build combines design and build t...
From £17,196
We Are RAM Construction are here to help customers who need an Extension Builder in BN22. We offer a competitive rate to complete all your extensio...
From £18,284
With over 20 years experience covering a multiple of disciplines within the building Industry, we are best placed to give you the correct advice on...
From £17,652
Need to find an Extension Builder near you for all your extension buildering work?
Avant-Garde Construction Group Limited provides a local,...
From £17,740
Experienced extension builder ready to quote for your work. CG Renovations Ltd is the best extension builder in BN22. No obligation free quotes and...
From £17,348
Our building services company Hinton & Moon Building Limited was only established in August 2022, but have been providing professional, trustworthy...
From £16,980
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £16,980 (Pro For You based in BN22) to £18,284 (Insite Sepecialists based in BN23), 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 BN22 by posting a job with HaMuch and we will send it to extension builders in BN22.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Eastbourne | £32 | £245 |
| Underpin A Building near Hailsham | £31 | £243 |
| Underpin A Building near Seaford | £34 | £243 |
| Underpin A Building near Bexhill-on-Sea | £31 | £243 |
| Underpin A Building near Wealden | £35 | £256 |
| Underpin A Building near Hastings | £31 | £246 |
| Underpin A Building near Brighton and Hove | £35 | £251 |
| Underpin A Building near Brighton | £35 | £251 |
| Underpin A Building near Crowborough | £36 | £258 |
| Underpin A Building near Burgess Hill | £36 | £240 |
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 - £17,507

Two storey extension - £88,011

Build a timber frame extension - £26,007

Build a swimming pool - £81,007

Single storey extension - £55,144

Side return extension - £41,581

Install an RSJ - £2,207

Outbuilding - £10,007

Build a Mansard loft conversion - £52,007

Loft conversion - £33,818

Build a kitchen extension - £42,007

Hip to gable loft conversion - £42,007

Granny annexe - £87,007

Garden office - £10,007

Convert a Garage - £16,007

Garage - £18,507

Build a flat roof extension - £22,007

Build a dormer loft conversion - £42,007

Concrete foundations - £6,257

Convert a bungalow loft - £29,007

Convert a basement - £37,581