From £21,288
We offer a wide range of services completed to a high standard with fully trained personnel
From £21,408
NG Builders is an established extension buildering business in BT79. We come highly recommended and provide competitive quotes for your work.
From £21,696
Relax... you have found a reliable extension builder in BT79. JAMSE CONSTRUCTION LTD is a friendly and reliable company based in BT79 who consider ...
From £21,784
JP&S Construction Ltd is an established extension buildering business in BT79. We come highly recommended and provide competitive quotes for your w...
From £21,784
Relax... you have found a reliable extension builder in BT79. Tyrone Turbos is a friendly and reliable company based in BT79 who consider no job as...
From £22,016
Need to find an Extension Builder near you for all your extension buildering work?
GMC Construction provides a local, trusted extension bui...

A flat roof extension ranges from the cheapest of £21,288 (M & R McElhatton Joinery based in BT76) to the dearest of £22,016 (GMC Construction based in BT70), 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 BT79 by posting a job with HaMuch. We'll send it to extension builders in BT79.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Dungannon | £23 | £186 |
| Build A Flat Roof Extension near Strabane | £21 | £173 |
| Build A Flat Roof Extension near Coalisland | £21 | £173 |
| Build A Flat Roof Extension near Dungiven | £21 | £179 |
| Build A Flat Roof Extension near Newbuildings | £20 | £166 |
| Build A Flat Roof Extension near Londonderry | £20 | £166 |
| Build A Flat Roof Extension near Magherafelt | £25 | £200 |
| Build A Flat Roof Extension near Strathfoyle | £20 | £166 |
| Build A Flat Roof Extension near Craigavon | £22 | £170 |
| Build A Flat Roof Extension near Coleraine | £21 | £181 |
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 - £17,163

Two storey extension - £87,494

Build a timber frame extension - £25,663

Build a swimming pool - £80,663

Single storey extension - £48,253

Side return extension - £37,705

Install an RSJ - £1,863

Outbuilding - £9,663

Build a Mansard loft conversion - £51,663

Loft conversion - £30,588

Build a kitchen extension - £41,663

Hip to gable loft conversion - £41,663

Granny annexe - £86,663

Garden office - £9,663

Convert a Garage - £15,663

Garage - £18,163

Build a flat roof extension - £21,663

Build a dormer loft conversion - £41,663

Concrete foundations - £5,913

Convert a bungalow loft - £28,663

Convert a basement - £33,705