From £86,296
Ballantine building solutions is an established extension buildering business in Carrickfergus. We come highly recommended and provide competitive ...
From £86,264
Trusted and professional extension builder in Carrickfergus. Experienced in all extension buildering work and keeping within budget and on quote. D...
From £86,384
Designco Ltd is an established extension buildering business in Carrickfergus. We come highly recommended and provide competitive quotes for your w...

Building a granny annexe ranges from £86,264 (DGA based in BT37) to £86,384 (Designco Ltd based in BT36), 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 Carrickfergus by posting a job with HaMuch. We will send it to extension builders in Carrickfergus who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Carrickfergus | £23 | £158 |
| Granny Annexe near Greenisland | £23 | £153 |
| Granny Annexe near Holywood | £23 | £159 |
| Granny Annexe near Bangor | £24 | £183 |
| Granny Annexe near Bangor | £24 | £183 |
| Granny Annexe near Larne | £15 | £122 |
| Granny Annexe near Ballyclare | £20 | £124 |
| Granny Annexe near Belfast | £23 | £161 |
| Granny Annexe near Ballygowan | £24 | £183 |
| Granny Annexe near Comber | £22 | £160 |
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 - £16,815

Two storey extension - £86,972

Build a timber frame extension - £25,315

Build a swimming pool - £80,315

Single storey extension - £41,293

Side return extension - £33,790

Install an RSJ - £1,515

Outbuilding - £9,315

Build a Mansard loft conversion - £51,315

Loft conversion - £27,325

Build a kitchen extension - £41,315

Hip to gable loft conversion - £41,315

Granny annexe - £86,315

Garden office - £9,315

Convert a Garage - £15,315

Garage - £17,815

Build a flat roof extension - £21,315

Build a dormer loft conversion - £41,315

Concrete foundations - £5,565

Convert a bungalow loft - £28,315

Convert a basement - £29,790