From £9,296
Ballantine building solutions is an established extension buildering business in Carrickfergus. We come highly recommended and provide competitive ...
From £9,264
Trusted and professional extension builder in Carrickfergus. Experienced in all extension buildering work and keeping within budget and on quote. D...
From £9,384
Designco Ltd is an established extension buildering business in Carrickfergus. We come highly recommended and provide competitive quotes for your w...

Outbuilding costs in Carrickfergus range from the cheapest of £9,264 (DGA based in BT37) to the dearest of £9,384 (Designco Ltd based in BT36), but these are just estimates.
Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build an outbuilding in Carrickfergus by posting a job with HaMuch and we will send it to extension builders.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Outbuilding near Carrickfergus | £23 | £158 |
| Outbuilding near Greenisland | £23 | £153 |
| Outbuilding near Holywood | £23 | £159 |
| Outbuilding near Bangor | £24 | £183 |
| Outbuilding near Bangor | £24 | £183 |
| Outbuilding near Larne | £15 | £122 |
| Outbuilding near Ballyclare | £20 | £124 |
| Outbuilding near Belfast | £23 | £161 |
| Outbuilding near Ballygowan | £24 | £183 |
| Outbuilding 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