A typical single-car garage is around 10-12 feet wide by 20-24 feet deep, so a 3-car garage would need to be significantly larger. A rough estimate for a 3-car garage would be around 36 feet wide and ...

Detached Garage Cost. Detached garages range in price from $1,500 for a no-frills stainless steel kit that fits one car to $50,000 for a barn-like custom garage that fits three cars and an in-law ...