From £22,000
All In One Building Services is an established and experienced local extension builder in CB25. Please contact us for a free, no obligation quote a...
From £21,888
Need to find an Extension Builder near you for all your extension buildering work?
Bespoke Build and Restoration ltd provides a local, trus...
From £22,080
Coulson Building Group is a trusted extension builder serving customers in CB25 and the surrounding area. Contact us to today to get a competitive ...

A flat roof extension ranges from the cheapest of £21,888 (Bespoke Build and Restoration ltd based in CB25) to the dearest of £22,080 (Coulson Building Group based in CB4), 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 CB25 by posting a job with HaMuch. We'll send it to extension builders in CB25.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Cambridge | £41 | £275 |
| Build A Flat Roof Extension near Ely | £40 | £279 |
| Build A Flat Roof Extension near South Cambridgeshire | £50 | £315 |
| Build A Flat Roof Extension near Haverhill | £37 | £260 |
| Build A Flat Roof Extension near Huntingdon | £38 | £284 |
| Build A Flat Roof Extension near Bury St Edmunds | £34 | £251 |
| Build A Flat Roof Extension near St Neots | £51 | £318 |
| Build A Flat Roof Extension near Huntingdonshire | £36 | £290 |
| Build A Flat Roof Extension near Biggleswade | £41 | £268 |
| Build A Flat Roof Extension near Thetford | £42 | £277 |
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 - £17,489

Two storey extension - £87,984

Build a timber frame extension - £25,989

Build a swimming pool - £80,989

Single storey extension - £54,787

Side return extension - £41,380

Install an RSJ - £2,189

Outbuilding - £9,989

Build a Mansard loft conversion - £51,989

Loft conversion - £33,650

Build a kitchen extension - £41,989

Hip to gable loft conversion - £41,989

Granny annexe - £86,989

Garden office - £9,989

Convert a Garage - £15,989

Garage - £18,489

Build a flat roof extension - £21,989

Build a dormer loft conversion - £41,989

Concrete foundations - £6,239

Convert a bungalow loft - £28,989

Convert a basement - £37,380