From £87,244
Trusted and professional extension builder in Portstewart. Experienced in all extension buildering work and keeping within budget and on quote. pur...
From £87,412
Need an Extension Builder in Portstewart? SF Carpentry has been helping local clients (20 mile radius) with their extension buildering jobs for man...
From £87,280
Luxury Garden Studios is an established and experienced local extension builder in Portstewart. Please contact us for a free, no obligation quote a...

Costs range from £87,244 (Purdy build based in bt53) to £87,412 (SF Carpentry based in BT51), but these are just estimates. The best way to compare costs is to get real quotes from real builders.
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| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Two Storey Extension near Coleraine | £23 | £201 |
| Two Storey Extension near Ballymoney | £21 | £187 |
| Two Storey Extension near Dungiven | £22 | £190 |
| Two Storey Extension near Strathfoyle | £24 | £190 |
| Two Storey Extension near Londonderry | £24 | £190 |
| Two Storey Extension near Magherafelt | £30 | £238 |
| Two Storey Extension near Newbuildings | £24 | £190 |
| Two Storey Extension near Strabane | £27 | £223 |
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 - £17,041

Two storey extension - £87,312

Build a timber frame extension - £25,541

Build a swimming pool - £80,541

Single storey extension - £45,827

Side return extension - £36,340

Install an RSJ - £1,741

Outbuilding - £9,541

Build a Mansard loft conversion - £51,541

Loft conversion - £29,450

Build a kitchen extension - £41,541

Hip to gable loft conversion - £41,541

Granny annexe - £86,541

Garden office - £9,541

Convert a Garage - £15,541

Garage - £18,041

Build a flat roof extension - £21,541

Build a dormer loft conversion - £41,541

Concrete foundations - £5,791

Convert a bungalow loft - £28,541

Convert a basement - £32,340