From £17,668
Our building services company MCO Building Contractors Ltd has been providing customers throughout West Sussex with professional, trustworthy build...
From £17,724
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,412
K. BRAND BUILDING LIMITED are here to help customers who need an Extension Builder in BN45. We offer a competitive rate to complete all your extens...
From £17,252
Experienced extension builder ready to quote for your work. Rock Build Ltd is the best extension builder in BN45. No obligation free quotes and man...
From £17,268
Master builder since 1960 new build and refurb all trades many photo albums to show
From £17,660
Trusted and professional extension builder in BN45. Experienced in all extension buildering work and keeping within budget and on quote. W&S BUILDI...
From £15,516
Ferguson Building Services Limited is an established and experienced local extension builder in BN45. Please contact us for a free, no obligation q...
From £17,404
Fenice Design + Build is an established and experienced local extension builder in BN45. Please contact us for a free, no obligation quote and comp...
From £17,356
Orchard Timberworks is a Brighton based Carpentry and Joinery business, located in the beautiful South Downs. We specialise in custom Carpentry and...
From £17,508
Business CategoriesBathroom Planners and Furnishers, Builders, Building Services, Cabinet Makers, Decking, Flooring Services, Home Improvem...

Underpinning ranges from £15,516 (Ferguson Building Services Limited based in BN6) to £17,724 (Hewison Jones Renovations LTD based in bn3), 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 BN45 by posting a job with HaMuch and we will send it to extension builders in BN45.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Brighton and Hove | £35 | £251 |
| Underpin A Building near Brighton | £35 | £251 |
| Underpin A Building near Shoreham-by-Sea | £36 | £250 |
| Underpin A Building near Burgess Hill | £36 | £240 |
| Underpin A Building near Lancing | £37 | £251 |
| Underpin A Building near Haywards Heath | £35 | £256 |
| Underpin A Building near Worthing | £35 | £251 |
| Underpin A Building near Mid Sussex | £35 | £261 |
| Underpin A Building near Horsham | £38 | £265 |
| Underpin A Building near Rustington | £36 | £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 - £17,277

Two storey extension - £87,665

Build a timber frame extension - £25,777

Build a swimming pool - £80,777

Single storey extension - £50,536

Side return extension - £38,989

Install an RSJ - £1,977

Outbuilding - £9,777

Build a Mansard loft conversion - £51,777

Loft conversion - £31,658

Build a kitchen extension - £41,777

Hip to gable loft conversion - £41,777

Granny annexe - £86,777

Garden office - £9,777

Convert a Garage - £15,777

Garage - £18,277

Build a flat roof extension - £21,777

Build a dormer loft conversion - £41,777

Concrete foundations - £6,027

Convert a bungalow loft - £28,777

Convert a basement - £34,989