Relax... you have found a reliable extension builder in BT12. SM Plumbing & Heating is a friendly and reliable company based in BT12 who consider n...
From £17,836
Trusted and professional extension builder in BT12. Experienced in all extension buildering work and keeping within budget and on quote. Belfast Lo...
From £17,676
Trusted and professional extension builder in BT12. Experienced in all extension buildering work and keeping within budget and on quote. Extended l...

Builders charge between £17,676 (Extended living by Gilbert-Ash based in BT12) and £17,868 (SM Plumbing & Heating based in BT7) in BT12 to build a garage, but these costs are only estimates.
Comparing extension builders estimates for building a garage gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get real quotes to build a new garage in BT12 by posting a job with HaMuch and we will send it to extension builders in BT12.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garage near Belfast | £23 | £161 |
| Garage near Carryduff | £23 | £158 |
| Garage near Holywood | £23 | £159 |
| Garage near Lisburn | £24 | £164 |
| Garage near Greenisland | £23 | £153 |
| Garage near Comber | £22 | £160 |
| Garage near Hillsborough and Culcavy | £25 | £170 |
| Garage near Crumlin | £26 | £194 |
| Garage near Ballygowan | £24 | £183 |
| Garage near Saintfield | £23 | £162 |
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 - £16,793

Two storey extension - £86,940

Build a timber frame extension - £25,293

Build a swimming pool - £80,293

Single storey extension - £40,867

Side return extension - £33,550

Install an RSJ - £1,493

Outbuilding - £9,293

Build a Mansard loft conversion - £51,293

Loft conversion - £27,125

Build a kitchen extension - £41,293

Hip to gable loft conversion - £41,293

Granny annexe - £86,293

Garden office - £9,293

Convert a Garage - £15,293

Garage - £17,793

Build a flat roof extension - £21,293

Build a dormer loft conversion - £41,293

Concrete foundations - £5,543

Convert a bungalow loft - £28,293

Convert a basement - £29,550