Need an Extension Builder in OL3? W WELSBY BUILDING SERVICE has been helping local clients (20 mile radius) with their extension buildering jobs fo...
Relax... you have found a reliable extension builder in OL3. CM BUILDING SERVICES is a friendly and reliable company based in OL3 who consider no j...
Shehele
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
I teach others on how to achieve flawless finishes through my blog on my website. i also am a stickler for perfection. I'm very friendly and punctu...
From £22,200
ANDREW WOOD CONSTRUCTION (SADDLEWORTH) LTD is an established extension buildering business in OL3. We come highly recommended and provide competiti...
From £21,648
Palm Developments is an established extension buildering business in OL3. We come highly recommended and provide competitive quotes for your work.<...

A flat roof extension ranges from the cheapest of £21,184 (Valdecor based in OL8) to the dearest of £22,200 (ANDREW WOOD CONSTRUCTION (SADDLEWORTH) LTD based in OL3), 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 OL3 by posting a job with HaMuch. We'll send it to extension builders in OL3.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Oldham | £31 | £229 |
| Build A Flat Roof Extension near Royton | £30 | £225 |
| Build A Flat Roof Extension near Stalybridge | £38 | £231 |
| Build A Flat Roof Extension near Ashton-under-Lyne | £36 | £232 |
| Build A Flat Roof Extension near Chadderton | £31 | £225 |
| Build A Flat Roof Extension near Tameside | £35 | £232 |
| Build A Flat Roof Extension near Dukinfield | £35 | £232 |
| Build A Flat Roof Extension near Failsworth | £35 | £236 |
| Build A Flat Roof Extension near Rochdale | £30 | £221 |
| Build A Flat Roof Extension near Hyde | £36 | £227 |
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 - £17,253

Two storey extension - £87,630

Build a timber frame extension - £25,753

Build a swimming pool - £80,753

Single storey extension - £50,063

Side return extension - £38,723

Install an RSJ - £1,953

Outbuilding - £9,753

Build a Mansard loft conversion - £51,753

Loft conversion - £31,436

Build a kitchen extension - £41,753

Hip to gable loft conversion - £41,753

Granny annexe - £86,753

Garden office - £9,753

Convert a Garage - £15,753

Garage - £18,253

Build a flat roof extension - £21,753

Build a dormer loft conversion - £41,753

Concrete foundations - £6,003

Convert a bungalow loft - £28,753

Convert a basement - £34,723