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...
Dan Nevill
Nevill Design & Build specialises in high-quality house extensions, loft conversions, structural alterations, and full refurbishments. We’ve deli...
From £18,668
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £18,908
Prestige Construction & Building Services Ltd is a family-run business with over 30 years industry experience. We offer a Design and Build service ...
From £18,524
Need an Extension Builder in CM21? Loft in Space London has been helping local clients (20 mile radius) with their extension buildering jobs for ma...
From £17,364
Valy
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £18,940
Linear Carpentry and Building has been helping customers in Hertfordshire and the surrounding area by providing professional and trustworthy buildi...
From £18,900
Experienced extension builder ready to quote for your work. RICHARD MORRIS (CONSTRUCTION) is the best extension builder in CM21. No obligation free...
From £18,556
With over 20 years of experience we specialise in fit-outs and maximising your living space. Lofts, extensions, basements, new builds and domestic ...
From £18,668
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...

Builders charge between £17,364 (V S M Property Services Ltd based in CM23) and £21,652 (Essex loft extensions Ltd based in CM20) in CM21 to build a garage, but these costs are only estimates.
Comparing extension builders estimates for building a garage gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get real quotes to build a new garage in CM21 by posting a job with HaMuch and we will send it to extension builders in CM21.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garage near Harlow | £43 | £288 |
| Garage near Bishop's Stortford | £42 | £264 |
| Garage near Ware | £47 | £296 |
| Garage near Hoddesdon | £46 | £296 |
| Garage near East Hertfordshire | £44 | £289 |
| Garage near Hertford | £46 | £290 |
| Garage near Cheshunt | £48 | £285 |
| Garage near Epping Forest | £44 | £274 |
| Garage near Loughton | £44 | £273 |
| Garage 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 - £17,870

Two storey extension - £88,556

Build a timber frame extension - £26,370

Build a swimming pool - £81,370

Single storey extension - £62,408

Side return extension - £45,667

Install an RSJ - £2,570

Outbuilding - £10,370

Build a Mansard loft conversion - £52,370

Loft conversion - £37,223

Build a kitchen extension - £42,370

Hip to gable loft conversion - £42,370

Granny annexe - £87,370

Garden office - £10,370

Convert a Garage - £16,370

Garage - £18,870

Build a flat roof extension - £22,370

Build a dormer loft conversion - £42,370

Concrete foundations - £6,620

Convert a bungalow loft - £29,370

Convert a basement - £41,667