The garage size will have the largest impact on ... It’s common to have a double door and a single door installed for a 3-car garage. On average, the cost to build a 3-car garage is $28,200 ...

The average double garage size in Australia is intended to be able to cope with a large car (5.0m long by 1.9m wide ... of 4.8m and a ceiling height of 2.3 metres and bulge to even greater ...