From £17,740
M&J Brickwork Ltd are a Chelmsford based Bricklaying & General Building company that operate throughout the Essex and South London...
From £17,180
Trusted and professional extension builder in CO5. Experienced in all extension buildering work and keeping within budget and on quote. CHAPEL BUIL...
From £17,508
Over 35 years experience
We are Gas Safe registered
We are Verified
We pride ourselves on great custom...
From £17,220
Need to find an Extension Builder near you for all your extension buildering work?
JLS Building Services provides a local, trusted extensio...
From £17,396
Relax... you have found a reliable extension builder in CO5. Mikra Services is a friendly and reliable company based in CO5 who consider no job as ...
From £17,220
Need an Extension Builder in CO5? S & A Building & Landscapes Service has been helping local clients (20 mile radius) with their extension builderi...
From £17,316
M & C CONSTRUCTION is an established extension buildering business in CO5. We come highly recommended and provide competitive quotes for your work....
From £17,508
AAV CONSTRUCTION LIMITED are here to help customers who need an Extension Builder in CO5. We offer a competitive rate to complete all your extensio...
From £17,108
JDS Building Services is an established extension buildering business in CO5. We come highly recommended and provide competitive quotes for your wo...
From £17,540
ALPHA BUILDING COMPANY LTD are here to help customers who need an Extension Builder in CO5. We offer a competitive rate to complete all your extens...

Underpinning ranges from £17,108 (JDS Building Services based in CO7) to £17,740 (M&J Brickwork Ltd based in CM3), 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 CO5 by posting a job with HaMuch and we will send it to extension builders in CO5.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Colchester | £34 | £232 |
| Underpin A Building near Maldon | £36 | £244 |
| Underpin A Building near Witham | £36 | £240 |
| Underpin A Building near Braintree | £37 | £247 |
| Underpin A Building near Tendring | £31 | £226 |
| Underpin A Building near Clacton-on-Sea | £31 | £230 |
| Underpin A Building near Chelmsford | £38 | £258 |
| Underpin A Building near Sudbury | £34 | £229 |
| Underpin A Building near Rayleigh | £39 | £252 |
| Underpin A Building near Wickford | £39 | £255 |
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 - £17,374

Two storey extension - £87,810

Build a timber frame extension - £25,874

Build a swimming pool - £80,874

Single storey extension - £52,472

Side return extension - £40,078

Install an RSJ - £2,074

Outbuilding - £9,874

Build a Mansard loft conversion - £51,874

Loft conversion - £32,565

Build a kitchen extension - £41,874

Hip to gable loft conversion - £41,874

Granny annexe - £86,874

Garden office - £9,874

Convert a Garage - £15,874

Garage - £18,374

Build a flat roof extension - £21,874

Build a dormer loft conversion - £41,874

Concrete foundations - £6,124

Convert a bungalow loft - £28,874

Convert a basement - £36,078