From £21,296
For all your needs. If you need to build a flat roof extension contact us today to get a no obligation free quote.
From £21,384
For all your needs. If you need to build a flat roof extension contact us today to get a no obligation free quote.
From £21,368
You want to build a flat roof extension? No problem, SM Plumbing & Heating is a reliable extension builder with years of experience helping homeown...
From £21,320
If you need to build a flat roof extension use C.H Property Services. Work is guarenteed and the cost won't hurt the pocket.
From £21,208
A friendly extension builder in Newtownabbey. Happy to provide references and a free quote to build a flat roof extension.
From £21,352
A service with a difference. Priced competitively to build a flat roof extension and more.
From £21,336
A friendly extension builder in Newtownabbey. Happy to provide references and a free quote to build a flat roof extension.
From £21,136
A service with a difference. Priced competitively to build a flat roof extension and more.
From £21,384
You want to build a flat roof extension? No problem, Finch Construction NI is a reliable extension builder with years of experience helping homeown...
From £20,976
Have worked in building industry for over 30 years contracts from government to private sector.
From £21,400
If you need to build a flat roof extension use T.I Building. Work is guarenteed and the cost won't hurt the pocket.
From £21,272
If you need to build a flat roof extension use apex pharaoh ltd. Work is guarenteed and the cost won't hurt the pocket.

A flat roof extension ranges from the cheapest of £20,976 (Anak based in BT40) to the dearest of £21,488 (AK Building Services based in BT8), 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 Newtownabbey by posting a job with HaMuch. We'll send it to extension builders in Newtownabbey.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Greenisland | £20 | £134 |
| Build A Flat Roof Extension near Holywood | £20 | £138 |
| Build A Flat Roof Extension near Belfast | £20 | £137 |
| Build A Flat Roof Extension near Carrickfergus | £21 | £145 |
| Build A Flat Roof Extension near Ballyclare | £17 | £110 |
| Build A Flat Roof Extension near Carryduff | £20 | £136 |
| Build A Flat Roof Extension near Bangor | £20 | £150 |
| Build A Flat Roof Extension near Bangor | £20 | £150 |
| Build A Flat Roof Extension near Comber | £20 | £142 |
| Build A Flat Roof Extension near Ballygowan | £20 | £150 |
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 - £16,797

Two storey extension - £86,946

Build a timber frame extension - £25,297

Build a swimming pool - £80,297

Single storey extension - £40,947

Side return extension - £33,595

Install an RSJ - £1,497

Outbuilding - £9,297

Build a Mansard loft conversion - £51,297

Loft conversion - £27,163

Build a kitchen extension - £41,297

Hip to gable loft conversion - £41,297

Granny annexe - £86,297

Garden office - £9,297

Convert a Garage - £15,297

Garage - £17,797

Build a flat roof extension - £21,297

Build a dormer loft conversion - £41,297

Concrete foundations - £5,547

Convert a bungalow loft - £28,297

Convert a basement - £29,595