From £86,608
Need an Extension Builder in Coleraine? SF Carpentry has been helping local clients (20 mile radius) with their extension buildering jobs for many ...
From £86,496
Trusted and professional extension builder in Coleraine. Experienced in all extension buildering work and keeping within budget and on quote. purdy...
From £86,520
Luxury Garden Studios is an established and experienced local extension builder in Coleraine. Please contact us for a free, no obligation quote and...
From £86,432
We have over 25 years experience in all building work and renowned for good workmanship All jobs small and large taken on
From £86,904
FJS CONTRACTS LTD are here to help customers who need an Extension Builder in Coleraine. We offer a competitive rate to complete all your extension...
From £87,016
Seamus Mcmullan building and joinery is an established extension buildering business in Coleraine. We come highly recommended and provide competiti...

Building a granny annexe ranges from £86,432 (C McGurk Building Contractor based in BT44) to £87,016 (Seamus Mcmullan building and joinery based in BT45), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in Coleraine by posting a job with HaMuch. We will send it to extension builders in Coleraine who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Coleraine | £23 | £201 |
| Granny Annexe near Ballymoney | £21 | £187 |
| Granny Annexe near Dungiven | £22 | £190 |
| Granny Annexe near Magherafelt | £30 | £238 |
| Granny Annexe near Londonderry | £24 | £190 |
| Granny Annexe near Strathfoyle | £24 | £190 |
| Granny Annexe near Newbuildings | £24 | £190 |
| Granny Annexe near Strabane | £27 | £223 |
| Granny Annexe near Ballyclare | £20 | £124 |
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