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Building a garage takes at least six to eight weeks, depending on how long it takes to get a building permit and other factors such as weather.

Building a suite or apartment on a level above a garage costs at least $100 per square foot in addition to the cost of the garage itself. This usually adds another $50,000 to $250,000 to the total project cost.

Generally, building a custom garage is better than buying and installing a prefab one. Prefab garage kits are less expensive, but they don’t add much to your home’s value (they may even reduce it) and don’t last as long as a custom-built garage, costing you more money in the long run.

A garage is an enclosed space with interior lights, insulation, and electricity, and may have running water and HVAC. A garage has a door that closes and locks, keeping your car secure. A carport is a simple structure with a roof (and sometimes walls) to protect your vehicle from the elements.