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CWN Developments Ltd
Relax... you have found a reliable extension builder in CM1. CWN Developments Ltd is a friendly and reliable company based in CM1 who consider no j...
"Looking to make a wooden shed at the back side of the house" - CM1, job posted 23/09/25
Mr.
Ian Young
Mr. is a trusted extension builder serving customers in CM1 and the surrounding area. Contact us to today to get a competitive quote for extension ...
"Swimming pool" - CHELMSFORD, job posted 07/06/25
Newman Multi Trade Services
Need to find an Extension Builder near you for all your extension buildering work?
Newman Multi Trade Services provides a local, trusted ex...
"Single storey extension" - CHELMSFORD, job posted 11/03/25
Martin Womersley Building Services
Martin Womersley Building Services is an established extension buildering business in CM1. We come highly recommended and provide competitive quote...
"Single storey extension" - CM1, job posted 03/09/24
Prestige Roofing Contractors Ltd
Prestige Roofing Contractors Ltd are here to help customers who need an Extension Builder in CM1. We offer a competitive rate to complete all your ...
Storm Roofing Essex
Storm Roofing Essex are here to help customers who need an Extension Builder in CM1. We offer a competitive rate to complete all your extension bui...
Mark scrutton
Mark Scrutton
Mark scrutton is a trusted extension builder serving customers in CM1 and the surrounding area. Contact us to today to get a competitive quote for...
£31/hr
£266/day
COLWIN CONSTRUCTION LTD
Experienced extension builder ready to quote for your work. COLWIN CONSTRUCTION LTD is the best extension builder in CM1. No obligation free quotes...
£41/hr
£264/day
S Walker Construction
Need to find an Extension Builder near you for all your extension buildering work?
S Walker Construction provides a local, trusted extensio...
£40/hr
£251/day
Murrill Carpentry & Building Ltd
Murrill Carpentry & Building Ltd are a well established, reliable, trustworthy, family run company with over twelve years experience.We are...
£37/hr
£236/day
RN Carpentry & Building
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...
£37/hr
£239/day
New Construction
Need to find an Extension Builder near you for all your extension buildering work?
New Construction provides a local, trusted extension bui...
£43/hr
£281/day
Clark Construction
Clark Construction are here to help customers who need an Extension Builder in CM1. We offer a competitive rate to complete all your extension buil...
£40/hr
£259/day
Genesis
Need an Extension Builder in CM1? Genesis has been helping local clients (20 mile radius) with their extension buildering jobs for many years. Get ...
£42/hr
£268/day
Ryan & Co Design & Build
Relax... you have found a reliable extension builder in CM1. Ryan & Co Design & Build is a friendly and reliable company based in CM1 who consider ...
£42/hr
£268/day
Sheek Contractors
Welcome to Sheek Contractors. We specialise in maintaining commercial properties for both business and private owners. Our highly skilled tradesm...
£39/hr
£252/day
Franklin and Mckenna Ltd
Franklin and Mckenna Ltd is an established and experienced local extension builder in CM1. Please contact us for a free, no obligation quote and co...
£42/hr
£268/day
Durrant Construction Limited
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...
£40/hr
£254/day
Elmcroft Development Ltd
Fast response for all your extension buildering needs around CM1
Elmcroft Development Ltd are an established and expe...
£36/hr
£235/day
ACK ENGINEERING LTD
ACK ENGINEERING LTD is an established and experienced local extension builder in CM1. Please contact us for a free, no obligation quote and competi...
Compare CM1 extension builders rates
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Extension Builders near Chelmsford | £38 | £258 |
| Extension Builders near Billericay | £38 | £248 |
| Extension Builders near Witham | £36 | £240 |
| Extension Builders near Wickford | £39 | £255 |
| Extension Builders near Braintree | £37 | £247 |
| Extension Builders near Brentwood | £39 | £255 |
| Extension Builders near Maldon | £36 | £244 |
| Extension Builders near Basildon | £39 | £251 |
| Extension Builders near Rayleigh | £39 | £252 |
| Extension Builders near Bishop's Stortford | £42 | £264 |
Job estimates from extension builders near you
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.

Build a timber frame extension - £26,040

Garden office - £10,040

Granny annexe - £87,040

Build a flat roof extension - £22,040

Convert a Garage - £16,040

Hip to gable loft conversion - £42,040

Convert a bungalow loft - £29,040

Build a dormer loft conversion - £42,040

Build a swimming pool - £81,040

Build a Mansard loft conversion - £52,040

Concrete foundations - £6,290

Underpin a building - £17,540

Two storey extension - £88,060

Convert a basement - £37,950

Side return extension - £41,950

Loft conversion - £34,125

Garage - £18,540

Single storey extension - £55,800

Outbuilding - £10,040

Install an RSJ - £2,240

Build a kitchen extension - £42,040
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