How Much Does A Garage Extension Cost. When it comes to the costs of adding onto existing garage, you are looking at an approximate cost of $1,250 per square meter. An over the garage extension will normally cost between £18,000 to £30,000 to build, depending on whether it's of a single or double size.
An over the garage extension will normally cost between £18,000 to £30,000 to build, depending on whether it's of a single or double size. An extension over a double garage gives you lots more space, enough for a new master bedroom or family bathroom. But, they’re cheaper and quicker to build so really it depends on your requirements.
Conversely, for the equivalent single detached garage, it will usually cost £1,500 for materials and £3,000 for labour.
Sometimes, people underestimate the cost of building a garage. That price usually includes the cost of labour, skip hire and waste fees, and removing the concrete base. Brick veneer will cost in the region of $1200 to $1600 per square metre while full brick will be $1300 to $1680 per square metre. How much does it cost to build an extension on a house?
