From £17,460
Trusted and professional extension builder in BN43. Experienced in all extension buildering work and keeping within budget and on quote. BRICKTEC B...
From £17,660
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,692
Woodmans Construction are here to help customers who need an Extension Builder in BN43. We offer a competitive rate to complete all your extension ...
From £17,604
Need an Extension Builder in BN43? Warrior Brickwork has been helping local clients (20 mile radius) with their extension buildering jobs for many ...
From £17,436
Adrian Harris Garden Design And Build are here to help customers who need an Extension Builder in BN43. We offer a competitive rate to complete all...
From £17,652
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,484
Need to find an Extension Builder near you for all your extension buildering work?
FIRST FORMAT BUILDING provides a local, trusted extensio...
From £17,332
G C Builders is an established and experienced local extension builder in BN43. Please contact us for a free, no obligation quote and competitive r...
From £17,260
Woodhart Group is an established extension buildering business in BN43. We come highly recommended and provide competitive quotes for your work.
From £17,316
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £17,260 (Woodhart Group based in BN41) to £17,692 (Woodmans Construction based in BN43), 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 BN43 by posting a job with HaMuch and we will send it to extension builders in BN43.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Shoreham-by-Sea | £36 | £250 |
| Underpin A Building near Lancing | £37 | £251 |
| Underpin A Building near Worthing | £35 | £251 |
| Underpin A Building near Brighton | £35 | £251 |
| Underpin A Building near Brighton and Hove | £35 | £251 |
| Underpin A Building near Rustington | £36 | £246 |
| Underpin A Building near Burgess Hill | £36 | £240 |
| Underpin A Building near Littlehampton | £35 | £244 |
| Underpin A Building near Arun | £35 | £241 |
| Underpin A Building near Haywards Heath | £35 | £256 |
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 - £17,490

Two storey extension - £87,984

Build a timber frame extension - £25,990

Build a swimming pool - £80,990

Single storey extension - £54,792

Side return extension - £41,383

Install an RSJ - £2,190

Outbuilding - £9,990

Build a Mansard loft conversion - £51,990

Loft conversion - £33,653

Build a kitchen extension - £41,990

Hip to gable loft conversion - £41,990

Granny annexe - £86,990

Garden office - £9,990

Convert a Garage - £15,990

Garage - £18,490

Build a flat roof extension - £21,990

Build a dormer loft conversion - £41,990

Concrete foundations - £6,240

Convert a bungalow loft - £28,990

Convert a basement - £37,383