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  • The size of a 3-car garage is typically between 30 by 20 feet and 60 by 30 feet. The average size is 36 by 24 feet.
  • The main benefit of owning a 3-car garage is the flexibility it offers for storage and other activities.
  • Be sure to consider vehicle size, storage layouts, other uses, and accessibility when building your lage garage. That way, you can avoid expensive renovation costs and accidents while planning a design to suit all your needs.

If you plan on building a 3-car garage soon, or you’re looking to expand your current garage to accommodate extra vehicles, you’ll want to know the usual size of a 3-car garage. Larger garages are convenient for families with more than one vehicle and for those who want to turn part of their garage into a potential workspace. So how much space does a 3-car garage need? 

How Big Is a 3-Car Garage?

The minimum size for a 3-car garage is around 30 feet by 20 feet. Larger 3-car garages max out at around 60 by 30 feet. The average 3-car garage is 36 by 24 feet. You can refer to this chart for 3-car garage square footage:

Size Width by Depth (in Feet) Square Footage
Small 30’x20’ 600
Average 36’x24’ 704
Large 60’x30’ 900

Benefits of a 3-Car Garage

The question might be, why would you even need that much space? Other than the obvious reason for owning a 3-car garage (owning three cars), larger garages offer a number of benefits.

The main benefit to having a large garage is of course the flexibility that the space provides. You can do a lot with 600 to 900 square feet of space, even if you don’t own three vehicles. Convert the extra space to a workshop, use it for storage, or even build on top of the structure for even more space! There’s a world of possibilities.

Things To Consider When Building a Large Garage

Of course, when finally choosing a size for your garage, there are a number of factors to consider:

Vehicle Sizes

First and foremost, it shouldn’t come as a surprise that you need to consider vehicle sizes. You’ll want to make sure that your vehicles can fit in your garage. You also might want to check on standard vehicle sizes all around. If you plan to sell your property in the future, it’ll likely be easier to sell a 3-car garage that can fit three standard-sized vehicles.


Your garage will likely end up doubling as storage space after it’s built. Try to incorporate storage into the plan from the start if you can. Account for how much storage you need and who in the family plans to use the space to store their belongings. You can layout the garage to suit your needs.

Other Activities

Garages are oftentimes multifunctional. They typically provide a space to park your vehicle and store your extra things, but garages can also serve other purposes. This is especially true for larger garages. Perhaps your teen is looking for a place to do band practice, or you need the space for your hobby. Either way, you might want to make provisions for these activities like adding extra power outlets or lights.


How you access the garage is another factor to consider. Does it connect to your house? What kinds of garage doors do you need to use? Figure out early if you want automatic doors, multiple entryways, and so on.

Benefits of Planning Your Garage Space

Planning your garage space in advance has a number of benefits. If you know how much space you need in your garage, you minimize any adjustments or renovations, which ultimately saves on construction costs.

By properly sizing your garage for your vehicles, you can also avoid any accidents when driving in or out of the space. In addition, you can size it to suit your needs, whether that be for your vehicles alone or to make room for workshop space.

Once you know how large you want your garage, you can also plan out its design to suit the rest of your property. Ultimately, planning is the key when it comes to your 3-car garage space. Consider how much space you really need and what you want to integrate into the plans to make your garage more than just a place to park your car.

About The Authors
Written By Automotive and Tech Writers

The Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.

Reviewed By Automotive Features Reviewer at

Lisa Conant grew up in Canada around a solid contingency of gear heads and DIY motor enthusiasts. She is an eclectic writer with a varied repertoire in the automotive industry, including research pieces with a focus on daily drivers and recreational vehicles. Lisa has written for Car Bibles and The Drive.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.

File Under : Lifestyle , For the Car Owner
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