From £6,690
Need to find an Extension Builder near you for all your extension buildering work?
Main Construction provides a local, trusted extension bu...
From £6,122
Need an Extension Builder in Southwick? MPS Home Improvements Ltd has been helping local clients (20 mile radius) with their extension buildering j...
From £6,242
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 £6,282
We are a family run business we 40 years experience delivering multiple projects from new developments . Extension. Loft conversion. Including foun...
From £6,362
Futureways Design and Build are here to help customers who need an Extension Builder in Southwick. We offer a competitive rate to complete all your...
From £6,450
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £6,130
Trusted and professional extension builder in Southwick. Experienced in all extension buildering work and keeping within budget and on quote. Stret...
From £5,978
Need to find an Extension Builder near you for all your extension buildering work?
Knights Construction provides a local, trusted extension...
From £6,018
Trusted and professional extension builder in Southwick. Experienced in all extension buildering work and keeping within budget and on quote. Paul ...
From £6,234
Need to find an Extension Builder near you for all your extension buildering work?
FMB CONSTRUCTION LTD provides a local, trusted extension...

Concrete foundations range from the £5,978 (Knights Construction based in BN18) to £6,690 (Main Construction based in BN12) in Southwick.
Comparing extension builders estimates for laying concrete foundations gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Find out the exact cost of laying concrete foundations in Southwick by posting a job with HaMuch. We will send it to extension builders who can give you a detailed quote.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Concrete Foundations near Shoreham-by-Sea | £36 | £250 |
| Concrete Foundations near Lancing | £37 | £251 |
| Concrete Foundations near Brighton | £35 | £251 |
| Concrete Foundations near Brighton and Hove | £35 | £251 |
| Concrete Foundations near Worthing | £35 | £251 |
| Concrete Foundations near Burgess Hill | £36 | £240 |
| Concrete Foundations near Rustington | £36 | £246 |
| Concrete Foundations near Haywards Heath | £35 | £256 |
| Concrete Foundations near Littlehampton | £35 | £244 |
| Concrete Foundations near Mid Sussex | £35 | £261 |
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 - £17,501

Two storey extension - £88,001

Build a timber frame extension - £26,001

Build a swimming pool - £81,001

Single storey extension - £55,016

Side return extension - £41,509

Install an RSJ - £2,201

Outbuilding - £10,001

Build a Mansard loft conversion - £52,001

Loft conversion - £33,758

Build a kitchen extension - £42,001

Hip to gable loft conversion - £42,001

Granny annexe - £87,001

Garden office - £10,001

Convert a Garage - £16,001

Garage - £18,501

Build a flat roof extension - £22,001

Build a dormer loft conversion - £42,001

Concrete foundations - £6,251

Convert a bungalow loft - £29,001

Convert a basement - £37,509