Kay Shearing
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...
Experienced extension builder ready to quote for your work. All Roofing & Guttering is the best extension builder in Ongar. No obligation free quot...
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 Ongar and the surrounding area. Contact us to today to get a competitive ...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
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 £21,952
ASB-McM UK Construction Limited is an established extension buildering business in Ongar. We come highly recommended and provide competitive quotes...
From £22,544
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £21,776
Rouslan Psaroudakis
Local bricklayer. Please contact me for any job, will be happy to give you free quote.
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 ...

A flat roof extension ranges from the cheapest of £21,776 (R.P. Bricklayer based in RM4) 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 Ongar by posting a job with HaMuch. We'll send it to extension builders in Ongar.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Harlow | £43 | £288 |
| Build A Flat Roof Extension near Brentwood | £39 | £255 |
| Build A Flat Roof Extension near Loughton | £44 | £273 |
| Build A Flat Roof Extension near Chelmsford | £38 | £258 |
| Build A Flat Roof Extension near Bishop's Stortford | £42 | £264 |
| Build A Flat Roof Extension near Epping Forest | £44 | £273 |
| Build A Flat Roof Extension near Romford | £45 | £274 |
| Build A Flat Roof Extension near Billericay | £38 | £248 |
| Build A Flat Roof Extension near Hoddesdon | £46 | £296 |
| Build A Flat Roof Extension near Redbridge | £41 | £264 |
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 - £17,927

Two storey extension - £88,641

Build a timber frame extension - £26,427

Build a swimming pool - £81,427

Single storey extension - £63,544

Side return extension - £46,306

Install an RSJ - £2,627

Outbuilding - £10,427

Build a Mansard loft conversion - £52,427

Loft conversion - £37,755

Build a kitchen extension - £42,427

Hip to gable loft conversion - £42,427

Granny annexe - £87,427

Garden office - £10,427

Convert a Garage - £16,427

Garage - £18,927

Build a flat roof extension - £22,427

Build a dormer loft conversion - £42,427

Concrete foundations - £6,677

Convert a bungalow loft - £29,427

Convert a basement - £42,306