How many square feet is a three car garage?

How many square feet is a three car garage?


A three-car garage is a desirable feature for many homeowners, providing ample space for parking multiple vehicles and additional storage. However, determining the exact square footage of a three-car garage can be a bit more complicated than it seems. In this article, we will explore the factors that influence the size of a three-car garage and provide an estimate of the typical square footage you can expect.

Factors Influencing the Size of a Three-Car Garage

Number of Vehicles: The primary factor that determines the size of a three-car garage is, of course, the number of vehicles it needs to accommodate. While the name suggests that it can house three cars, it’s important to note that the size of vehicles can vary significantly. A three-car garage should be able to comfortably fit three average-sized cars, but if you have larger vehicles, such as trucks or SUVs, you may need to consider a larger garage.

Additional Space: Apart from parking the vehicles, many homeowners also utilize their three-car garages for additional purposes like storage, workshops, or recreational areas. If you plan to use your garage for any of these purposes, you will need to account for the extra space required. This can vary depending on your specific needs and preferences.

Local Building Codes: Building codes and regulations can also influence the size of a three-car garage. Different regions may have specific requirements regarding setbacks, height restrictions, and overall dimensions. It’s essential to consult with local authorities or a professional builder to ensure compliance with these regulations.

Estimating the Square Footage

While the exact square footage of a three-car garage can vary, there are some general guidelines that can help you estimate the size you may need. It’s important to note that these are rough estimates and should be used as a starting point for your planning process.

On average, a three-car garage can range from around 600 to 900 square feet. This estimate assumes that the vehicles are of average size and that you don’t require additional space for storage or other purposes. If you have larger vehicles or plan to utilize the garage for other activities, you may need to consider a larger size.

To calculate the square footage, you can use the following formula: length x width = square footage. For example, if your garage is 20 feet long and 30 feet wide, the square footage would be 600 square feet.

It’s worth mentioning that some homeowners opt for oversized three-car garages to provide more space for maneuvering vehicles or additional storage. In such cases, the square footage can exceed the average range mentioned above.


In conclusion, the square footage of a three-car garage can vary depending on several factors, including the size of the vehicles, additional space requirements, and local building codes. While the average range is between 600 and 900 square feet, it’s essential to consider your specific needs and consult with professionals to determine the appropriate size for your three-car garage.