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Jon Howard Construction Ltd is a trusted extension builder serving customers in Harlow and the surrounding area. Contact us to today to get a compe...
Colin
Harlow, CM20
We are small building company working for the residential and domestic properties? We work on all types of buildings creating Loft conversion and H...
D C Salsbury Builders is an established and experienced local extension builder in Harlow. Please contact us for a free, no obligation quote and co...
Experienced extension builder ready to quote for your work. All Roofing & Guttering is the best extension builder in Harlow. No obligation free quo...
J G BUILDING SERVICES is a trusted extension builder serving customers in Harlow and the surrounding area. Contact us to today to get a competitive...
Dan Nevill
Nevill Design & Build specialises in high-quality house extensions, loft conversions, structural alterations, and full refurbishments. We’ve deli...
From £22,424
Hopson Bros Services is a trusted extension builder serving customers in Harlow and the surrounding area. Contact us to today to get a competitive ...
From £22,224
Experienced extension builder ready to quote for your work. Groome & Sons Ltd is the best extension builder in Harlow. No obligation free quotes an...
From £22,384
D E BRACKEN BUILDING SERVICES is an established and experienced local extension builder in Harlow. Please contact us for a free, no obligation quot...
From £22,168
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

A flat roof extension ranges from the cheapest of £21,912 (J G BUILDING SERVICES based in CM19) 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 Harlow by posting a job with HaMuch. We'll send it to extension builders in Harlow.
| 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 - £18,008

Two storey extension - £88,762

Build a timber frame extension - £26,508

Build a swimming pool - £81,508

Single storey extension - £65,160

Side return extension - £47,215

Install an RSJ - £2,708

Outbuilding - £10,508

Build a Mansard loft conversion - £52,508

Loft conversion - £38,513

Build a kitchen extension - £42,508

Hip to gable loft conversion - £42,508

Granny annexe - £87,508

Garden office - £10,508

Convert a Garage - £16,508

Garage - £19,008

Build a flat roof extension - £22,508

Build a dormer loft conversion - £42,508

Concrete foundations - £6,758

Convert a bungalow loft - £29,508

Convert a basement - £43,215