From £86,496
Trusted and professional extension builder in Ballycastle. Experienced in all extension buildering work and keeping within budget and on quote. pur...

Building a granny annexe ranges from £86,496 (Purdy build based in bt53) to £86,496 (Purdy build based in bt53), 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 Ballycastle by posting a job with HaMuch. We will send it to extension builders in Ballycastle who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Ballymoney | £21 | £187 |
| Granny Annexe near Coleraine | £23 | £201 |
| Granny Annexe near Larne | £15 | £122 |
| Granny Annexe near Dungiven | £22 | £190 |
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 - £16,996

Two storey extension - £87,244

Build a timber frame extension - £25,496

Build a swimming pool - £80,496

Single storey extension - £44,920

Side return extension - £35,830

Install an RSJ - £1,696

Outbuilding - £9,496

Build a Mansard loft conversion - £51,496

Loft conversion - £29,025

Build a kitchen extension - £41,496

Hip to gable loft conversion - £41,496

Granny annexe - £86,496

Garden office - £9,496

Convert a Garage - £15,496

Garage - £17,996

Build a flat roof extension - £21,496

Build a dormer loft conversion - £41,496

Concrete foundations - £5,746

Convert a bungalow loft - £28,496

Convert a basement - £31,830