Relax... you have found a reliable extension builder in Greenisland. SM Plumbing & Heating is a friendly and reliable company based in Greenisland ...
From £9,296
Ballantine building solutions is an established extension buildering business in Greenisland. We come highly recommended and provide competitive qu...
From £9,264
Trusted and professional extension builder in Greenisland. Experienced in all extension buildering work and keeping within budget and on quote. DGA...
From £9,384
Designco Ltd is an established extension buildering business in Greenisland. We come highly recommended and provide competitive quotes for your wor...
From £9,376
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Outbuilding costs in Greenisland 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 Greenisland by posting a job with HaMuch and we will send it to extension builders.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Outbuilding near Greenisland | £23 | £153 |
| Outbuilding near Carrickfergus | £23 | £158 |
| Outbuilding near Holywood | £23 | £159 |
| Outbuilding near Belfast | £23 | £161 |
| Outbuilding near Ballyclare | £20 | £124 |
| Outbuilding near Bangor | £24 | £183 |
| Outbuilding near Bangor | £24 | £183 |
| Outbuilding near Carryduff | £23 | £158 |
| Outbuilding near Ballygowan | £24 | £183 |
| Outbuilding near Larne | £15 | £122 |
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 - £16,838

Two storey extension - £87,006

Build a timber frame extension - £25,338

Build a swimming pool - £80,338

Single storey extension - £41,752

Side return extension - £34,048

Install an RSJ - £1,538

Outbuilding - £9,338

Build a Mansard loft conversion - £51,338

Loft conversion - £27,540

Build a kitchen extension - £41,338

Hip to gable loft conversion - £41,338

Granny annexe - £86,338

Garden office - £9,338

Convert a Garage - £15,338

Garage - £17,838

Build a flat roof extension - £21,338

Build a dormer loft conversion - £41,338

Concrete foundations - £5,588

Convert a bungalow loft - £28,338

Convert a basement - £30,048