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SM Plumbing & Heating
Relax... you have found a reliable extension builder in Greenisland. SM Plumbing & Heating is a friendly and reliable company based in Greenisland ...
"Build a swimming pool" - BT4, job posted 21/09/26
£24/hr
£162/day
Ballantine building solutions
Ballantine building solutions is an established extension buildering business in Greenisland. We come highly recommended and provide competitive qu...
"Two storey extension" - BT37, job posted 24/08/26
£23/hr
£158/day
DGA
Trusted and professional extension builder in Greenisland. Experienced in all extension buildering work and keeping within budget and on quote. DGA...
"Attic conversion 2 bedroom" - BT36, job posted 26/10/25
£25/hr
£173/day
Designco Ltd
Designco Ltd is an established extension buildering business in Greenisland. We come highly recommended and provide competitive quotes for your wor...
"Dormer loft conversion" - NEWTOWNABBEY, job posted 11/03/25
£25/hr
£172/day
LM Design & Build
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
"Hip to gable loft conversion" - CARRICKFERGUS, job posted 20/10/24
Compare Greenisland extension builders rates
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Extension Builders near Greenisland | £23 | £153 |
| Extension Builders near Carrickfergus | £23 | £158 |
| Extension Builders near Holywood | £23 | £159 |
| Extension Builders near Belfast | £23 | £161 |
| Extension Builders near Ballyclare | £20 | £124 |
| Extension Builders near Bangor | £24 | £183 |
| Extension Builders near Bangor | £24 | £183 |
| Extension Builders near Carryduff | £23 | £158 |
| Extension Builders near Ballygowan | £24 | £183 |
| Extension Builders near Larne | £15 | £122 |
Job estimates from extension builders near you
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.
Build a timber frame extension - £25,336
Garden office - £9,336
Granny annexe - £86,336
Build a flat roof extension - £21,336
Convert a Garage - £15,336
Hip to gable loft conversion - £41,336
Convert a bungalow loft - £28,336
Build a dormer loft conversion - £41,336
Build a swimming pool - £80,336
Build a Mansard loft conversion - £51,336
Concrete foundations - £5,586
Underpin a building - £16,836
Two storey extension - £87,004
Convert a basement - £30,030
Side return extension - £34,030
Loft conversion - £27,525
Garage - £17,836
Single storey extension - £41,720
Outbuilding - £9,336
Install an RSJ - £1,536
Build a kitchen extension - £41,336
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