From £21,512
N W Doyle & Son is a trusted extension builder serving customers in Portaferry and the surrounding area. Contact us to today to get a competitive q...
From £21,136
Need to find an Extension Builder near you for all your extension buildering work?
Mount Oriel Conversions & Extensions provides a local, t...
From £21,272
apex pharaoh ltd is a trusted extension builder serving customers in Portaferry and the surrounding area. Contact us to today to get a competitive ...

A flat roof extension ranges from the cheapest of £21,136 (Mount Oriel Conversions & Extensions based in BT8) to the dearest of £21,512 (N W Doyle & Son based in BT24), 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 Portaferry by posting a job with HaMuch. We'll send it to extension builders in Portaferry.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Portaferry | £22 | £164 |
| Build A Flat Roof Extension near Saintfield | £23 | £162 |
| Build A Flat Roof Extension near Ballynahinch | £19 | £189 |
| Build A Flat Roof Extension near Comber | £22 | £160 |
| Build A Flat Roof Extension near Ballygowan | £24 | £183 |
| Build A Flat Roof Extension near Carryduff | £23 | £158 |
| Build A Flat Roof Extension near Bangor | £24 | £183 |
| Build A Flat Roof Extension near Bangor | £24 | £183 |
| Build A Flat Roof Extension near Holywood | £23 | £159 |
| Build A Flat Roof Extension near Belfast | £23 | £161 |
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 - £16,852

Two storey extension - £87,028

Build a timber frame extension - £25,352

Build a swimming pool - £80,352

Single storey extension - £42,040

Side return extension - £34,210

Install an RSJ - £1,552

Outbuilding - £9,352

Build a Mansard loft conversion - £51,352

Loft conversion - £27,675

Build a kitchen extension - £41,352

Hip to gable loft conversion - £41,352

Granny annexe - £86,352

Garden office - £9,352

Convert a Garage - £15,352

Garage - £17,852

Build a flat roof extension - £21,352

Build a dormer loft conversion - £41,352

Concrete foundations - £5,602

Convert a bungalow loft - £28,352

Convert a basement - £30,210