From £17,572
Need an Extension Builder in Chelmsford? Genesis has been helping local clients (20 mile radius) with their extension buildering jobs for many year...
From £17,644
Welcome to Sheek Contractors. We specialise in maintaining commercial properties for both business and private owners. Our highly skilled tradesm...
From £17,644
Relax... you have found a reliable extension builder in Chelmsford. Ryan & Co Design & Build is a friendly and reliable company based in Chelmsford...
From £17,644
Durrant Construction was formed in 2012 by Luke Durrant. Luke has been in the building trade for over 15 years and has had substantial experience i...
From £17,380
ACK ENGINEERING LTD is an established and experienced local extension builder in Chelmsford. Please contact us for a free, no obligation quote and ...
From £17,740
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,324
Chelmsford, CM2
Relax... you have found a reliable extension builder in Chelmsford. CWN Developments Ltd is a friendly and reliable company based in Chelmsford who...
From £17,612
Chelmsford, CM1
Need to find an Extension Builder near you for all your extension buildering work?
S Walker Construction provides a local, trusted extensio...
From £17,388
Chelmsford, CM1
Storm Roofing Essex are here to help customers who need an Extension Builder in Chelmsford. We offer a competitive rate to complete all your extens...
From £17,628
Chelmsford, CM1
Experienced extension builder ready to quote for your work. COLWIN CONSTRUCTION LTD is the best extension builder in Chelmsford. No obligation free...

Underpinning ranges from £17,324 (CWN Developments Ltd based in CM2) to £17,740 (SNC Construction ltd based in CM2), 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 Chelmsford by posting a job with HaMuch and we will send it to extension builders in Chelmsford.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Chelmsford | £38 | £258 |
| Underpin A Building near Billericay | £38 | £248 |
| Underpin A Building near Witham | £36 | £240 |
| Underpin A Building near Wickford | £39 | £255 |
| Underpin A Building near Maldon | £36 | £244 |
| Underpin A Building near Brentwood | £39 | £255 |
| Underpin A Building near Braintree | £37 | £247 |
| Underpin A Building near Basildon | £39 | £251 |
| Underpin A Building near Rayleigh | £39 | £252 |
| Underpin A Building near Thundersley | £38 | £251 |
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 - £17,558

Two storey extension - £88,086

Build a timber frame extension - £26,058

Build a swimming pool - £81,058

Single storey extension - £56,152

Side return extension - £42,148

Install an RSJ - £2,258

Outbuilding - £10,058

Build a Mansard loft conversion - £52,058

Loft conversion - £34,290

Build a kitchen extension - £42,058

Hip to gable loft conversion - £42,058

Granny annexe - £87,058

Garden office - £10,058

Convert a Garage - £16,058

Garage - £18,558

Build a flat roof extension - £22,058

Build a dormer loft conversion - £42,058

Concrete foundations - £6,308

Convert a bungalow loft - £29,058

Convert a basement - £38,148