Building a detached garage with apartment above can be an exciting project and a great way to add value to your home. The cost of adding a second floor depends on the size of the garage, but it’s typically in the $100s per square foot. If you’re building a new house instead of adding onto an existing structure, you’ll also need to consider the cost of construction labor and materials for the foundation and framing.
The total cost will depend on how large you make your garage apartment. The average size is about 500 square feet (46 square meters), but some are as small as 300 square feet (28 square meters). To calculate the cost of building a detached garage with apartment, take your current rent and multiply it by 10% or 15%. Then add 10% to 15% more for improvements such as insulation or better appliances.
Cost to build 2 car detached garage with apartment
A 2-car detached garage with an apartment above it can cost between $50,000 and $55,000 to build. This price includes everything from materials to labor and permits. The average cost of building a 2 car garage with an apartment is $51,000. What’s included in the cost of this project?
The price for this project includes:
Concrete slab foundation
Wood frame structure
Insulation and drywall
Flooring (vinyl or carpet)
Doors (exterior)