From £17,940
Need to find an Extension Builder near you for all your extension buildering work?
Main Construction provides a local, trusted extension bu...
From £17,508
Whites Carpentry & Building prides in delivering an excellent extension buildering service and value for money in Goring-by-sea and the surrounding...
From £17,372
Need an Extension Builder in Goring-by-sea? MPS Home Improvements Ltd has been helping local clients (20 mile radius) with their extension builderi...
From £17,492
Member since August 2026
H P Building Services Sussex is a one-stop solution for all your extension buildering needs. Establish over 10 years ago and covering 20 miles arou...
From £17,612
Futureways Design and Build are here to help customers who need an Extension Builder in Goring-by-sea. We offer a competitive rate to complete all ...
From £17,700
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,876
Giles Dixon is an experienced Project Manager with over 30 years experience, having worked from the ground up starting in 1984 as an apprentice ele...
From £17,628
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,380
Goring-by-Sea, BN12
Trusted and professional extension builder in Goring-by-sea. Experienced in all extension buildering work and keeping within budget and on quote. S...
From £17,556
K A Griffin General Builder is an established extension buildering business in Goring-by-sea. We come highly recommended and provide competitive qu...

Underpinning ranges from £17,372 (MPS Home Improvements Ltd based in RH14) to £17,940 (Main Construction based in BN12), 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 Goring-by-sea by posting a job with HaMuch and we will send it to extension builders in Goring-by-sea.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Worthing | £35 | £251 |
| Underpin A Building near Rustington | £36 | £246 |
| Underpin A Building near Lancing | £37 | £251 |
| Underpin A Building near Littlehampton | £35 | £244 |
| Underpin A Building near Arun | £35 | £241 |
| Underpin A Building near Shoreham-by-Sea | £36 | £250 |
| Underpin A Building near Bognor Regis | £35 | £247 |
| Underpin A Building near Brighton | £35 | £251 |
| Underpin A Building near Brighton and Hove | £35 | £251 |
| Underpin A Building near Chichester | £34 | £242 |
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 - £17,606

Two storey extension - £88,160

Build a timber frame extension - £26,106

Build a swimming pool - £81,106

Single storey extension - £57,128

Side return extension - £42,697

Install an RSJ - £2,306

Outbuilding - £10,106

Build a Mansard loft conversion - £52,106

Loft conversion - £34,748

Build a kitchen extension - £42,106

Hip to gable loft conversion - £42,106

Granny annexe - £87,106

Garden office - £10,106

Convert a Garage - £16,106

Garage - £18,606

Build a flat roof extension - £22,106

Build a dormer loft conversion - £42,106

Concrete foundations - £6,356

Convert a bungalow loft - £29,106

Convert a basement - £38,697