From £5,914
Experienced extension builder ready to quote for your work. M & J Building Contractors is the best extension builder in Cornwall. No obligation fre...
From £6,018
Cornwall, EX22
We are experienced, creative, skilled craftspeople and builders. We design, construct and install interior projects for any space in your home. Fro...
From £5,602
Eastman Landscapes is a trusted extension builder serving customers in Cornwall and the surrounding area. Contact us to today to get a competitive ...
From £5,946
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £6,010
Need to find an Extension Builder near you for all your extension buildering work?
SCP CONSTRUCTION provides a local, trusted extension bui...
From £6,338
Need to find an Extension Builder near you for all your extension buildering work?
BURGESS CONSTRUCTION provides a local, trusted extension...
From £5,986
Relax... you have found a reliable extension builder in Cornwall. Garage Door Repairman is a friendly and reliable company based in Cornwall who co...
From £5,898
RJ WEVILL BUILDER are here to help customers who need an Extension Builder in Cornwall. We offer a competitive rate to complete all your extension ...
From £6,314
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £6,394
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Concrete foundations range from the £5,602 (Eastman Landscapes based in PL15) to £6,394 (A J HEARD BUILDERS LTD based in EX20) in Cornwall.
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 Cornwall 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 Bideford | £22 | £174 |
| Concrete Foundations near Barnstaple | £25 | £196 |
| Concrete Foundations near Newquay | £32 | £230 |
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 - £17,292

Two storey extension - £87,688

Build a timber frame extension - £25,792

Build a swimming pool - £80,792

Single storey extension - £50,840

Side return extension - £39,160

Install an RSJ - £1,992

Outbuilding - £9,792

Build a Mansard loft conversion - £51,792

Loft conversion - £31,800

Build a kitchen extension - £41,792

Hip to gable loft conversion - £41,792

Granny annexe - £86,792

Garden office - £9,792

Convert a Garage - £15,792

Garage - £18,292

Build a flat roof extension - £21,792

Build a dormer loft conversion - £41,792

Concrete foundations - £6,042

Convert a bungalow loft - £28,792

Convert a basement - £35,160