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N W Doyle & Son is a trusted extension builder serving customers in Castlewellan and the surrounding area. Contact us to today to get a competitive...

A flat roof extension ranges from the cheapest of £21,512 (N W Doyle & Son based in BT24) 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 Castlewellan by posting a job with HaMuch. We'll send it to extension builders in Castlewellan.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Ballynahinch | £19 | £189 |
| Build A Flat Roof Extension near Banbridge | £29 | £205 |
| Build A Flat Roof Extension near Saintfield | £23 | £162 |
| Build A Flat Roof Extension near Hillsborough and Culcavy | £25 | £170 |
| Build A Flat Roof Extension near Kilkeel | £28 | £182 |
| Build A Flat Roof Extension near Lisburn | £24 | £164 |
| Build A Flat Roof Extension near Waringstown | £23 | £167 |
| Build A Flat Roof Extension near Maghaberry | £31 | £205 |
| Build A Flat Roof Extension near Carryduff | £23 | £158 |
| Build A Flat Roof Extension near Portaferry | £22 | £164 |
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 - £17,012

Two storey extension - £87,268

Build a timber frame extension - £25,512

Build a swimming pool - £80,512

Single storey extension - £45,240

Side return extension - £36,010

Install an RSJ - £1,712

Outbuilding - £9,512

Build a Mansard loft conversion - £51,512

Loft conversion - £29,175

Build a kitchen extension - £41,512

Hip to gable loft conversion - £41,512

Granny annexe - £86,512

Garden office - £9,512

Convert a Garage - £15,512

Garage - £18,012

Build a flat roof extension - £21,512

Build a dormer loft conversion - £41,512

Concrete foundations - £5,762

Convert a bungalow loft - £28,512

Convert a basement - £32,010