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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 CM17 and the surrounding area. Contact us to today to get a competitive q...
From £22,168
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £22,408
Prestige Construction & Building Services Ltd is a family-run business with over 30 years industry experience. We offer a Design and Build service ...
From £22,024
Need an Extension Builder in CM17? Loft in Space London has been helping local clients (20 mile radius) with their extension buildering jobs for ma...
From £22,128
Trusted and professional extension builder in CM17. Experienced in all extension buildering work and keeping within budget and on quote. THE ROMAN ...
From £22,080
VIBE CONSTRUCTION LIMITED is an established extension buildering business in CM17. We come highly recommended and provide competitive quotes for yo...
From £22,352
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £22,168
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...
From £21,840
Urban lofts and extensions ltd is an established extension buildering business in CM17. We come highly recommended and provide competitive quotes f...

A flat roof extension ranges from the cheapest of £21,840 (Urban lofts and extensions ltd based in cm20) to the dearest of £25,152 (Essex loft extensions Ltd based in CM20), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.
Find out how much your flat roof extension will cost in CM17 by posting a job with HaMuch. We'll send it to extension builders in CM17.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Harlow | £43 | £288 |
| Build A Flat Roof Extension near Hoddesdon | £46 | £296 |
| Build A Flat Roof Extension near Bishop's Stortford | £42 | £264 |
| Build A Flat Roof Extension near Ware | £47 | £296 |
| Build A Flat Roof Extension near Epping Forest | £44 | £274 |
| Build A Flat Roof Extension near Loughton | £44 | £273 |
| Build A Flat Roof Extension near Cheshunt | £48 | £285 |
| Build A Flat Roof Extension near Hertford | £46 | £290 |
| Build A Flat Roof Extension near East Hertfordshire | £44 | £289 |
| Build A Flat Roof Extension near Romford | £45 | £274 |
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 - £17,923

Two storey extension - £88,635

Build a timber frame extension - £26,423

Build a swimming pool - £81,423

Single storey extension - £63,464

Side return extension - £46,261

Install an RSJ - £2,623

Outbuilding - £10,423

Build a Mansard loft conversion - £52,423

Loft conversion - £37,718

Build a kitchen extension - £42,423

Hip to gable loft conversion - £42,423

Granny annexe - £87,423

Garden office - £10,423

Convert a Garage - £16,423

Garage - £18,923

Build a flat roof extension - £22,423

Build a dormer loft conversion - £42,423

Concrete foundations - £6,673

Convert a bungalow loft - £29,423

Convert a basement - £42,261