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Select your affordable CM20 extension builder
Colin
We are small building company working for the residential and domestic properties? We work on all types of buildings creating Loft conversion and H...
J G BUILDING SERVICES is a trusted extension builder serving customers in CM20 and the surrounding area. Contact us to today to get a competitive q...
From £39,390
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £42,090
Prestige Construction & Building Services Ltd is a family-run business with over 30 years industry experience. We offer a Design and Build service ...
From £37,770
Need an Extension Builder in CM20? Loft in Space London has been helping local clients (20 mile radius) with their extension buildering jobs for ma...
From £38,940
Trusted and professional extension builder in CM20. Experienced in all extension buildering work and keeping within budget and on quote. THE ROMAN ...
From £38,400
VIBE CONSTRUCTION LIMITED is an established extension buildering business in CM20. We come highly recommended and provide competitive quotes for yo...
From £37,500
Our building services company Added Space Ltd have over fifty years combined experience. We have been helping customers in Harlow and the surroundi...
From £35,700
Urban lofts and extensions ltd is an established extension buildering business in CM20. We come highly recommended and provide competitive quotes f...
From £39,390
Welstrong Construction is a team of friends and brothers who enjoy working in the building industry and aim to make sure every customer is fully sa...

Comparing extension builders estimates for a Convert a basement gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for the cost to convert a basement in CM20 by posting a job with HaMuch and we will send it to extension builders in CM20.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Convert A Basement near Harlow | £43 | £288 |
| Convert A Basement near Hoddesdon | £46 | £296 |
| Convert A Basement near Ware | £47 | £296 |
| Convert A Basement near Bishop's Stortford | £42 | £264 |
| Convert A Basement near Cheshunt | £48 | £285 |
| Convert A Basement near Epping Forest | £44 | £274 |
| Convert A Basement near Hertford | £46 | £290 |
| Convert A Basement near Loughton | £44 | £273 |
| Convert A Basement near East Hertfordshire | £44 | £289 |
| Convert A Basement near Welwyn Garden City | £42 | £269 |
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 - £17,888

Two storey extension - £88,582

Build a timber frame extension - £26,388

Build a swimming pool - £81,388

Single storey extension - £62,760

Side return extension - £45,865

Install an RSJ - £2,588

Outbuilding - £10,388

Build a Mansard loft conversion - £52,388

Loft conversion - £37,388

Build a kitchen extension - £42,388

Hip to gable loft conversion - £42,388

Granny annexe - £87,388

Garden office - £10,388

Convert a Garage - £16,388

Garage - £18,888

Build a flat roof extension - £22,388

Build a dormer loft conversion - £42,388

Concrete foundations - £6,638

Convert a bungalow loft - £29,388

Convert a basement - £41,865