Two-car garage dimensions are generally 18 feet wide by 20 feet deep. But, if you want space to fully open the doors of the car, or you want more storage area or a workspace, there are other common sizes, including 20 x 20, 22 x 22, and 20 x 22.
20 feet is deep enough to fit one car lengthwise and still have space for some extra storage.
Best depth is at least 24 feet, so you can close the door and have room to work on the front or back of a large car or truck. I have a 21foot long truck. I would say 36 -40 feet is good width.
The minimum recommended width for a single garage is 10 feet wide, which provides ample clearance around the vehicle. The minimum depth should be at least 18 feet.
In most areas of the United States, garage footers are usually dug 36 inches below the final grade. The footer size is typically 20 inches wide and 8 inches deep. If your township requires something different, it will be done according to your municipality requirements.
Preparing the ground
As a rule of thumb, concrete slabs supporting lighter weights such as paths, patios and shed bases will need to be 75-100mm thick, while driveways and garages need to be at least 100mm thick. Slabs intended for commercial use should be at least 175mm thick and reinforced.
Without a doubt, concrete is the most durable garage foundation type. It can support the weight of vehicles and won't shift or sink over time. Plus, with proper care, a concrete slab can last for 30+ years, making it the best choice for anyone planning to use their garage for parking or heavy-duty work.
Although there is some wiggle room built in, the average depth of a standard-sized garage door is between 18 and 24 feet. That should fit just about any “regular” vehicle being sold today. The longest trucks on the market top out at around 250 inches, which is just over 20 feet.
Standard 2-Car Garage Dimensions
The dimensions of a garage should be at least 20-feet wide by 20-feet deep to allow enough room to comfortably park both cars and open doors into and out of the space, but this setup won't leave much room for storage.
Then go with a 24 feet wide and 20 feet deep garage. This will allow 2 feet on each side of your (2) 9 feet doors. And as always if you have a full-size SUV or truck, go with a 24 feet minimum garage. A good rule of thumb for your garage size is to allow a minimum of 2 feet around all sides of your vehicle.
While the standard size for a three-car garage is 32 feet wide and 22 feet deep (32×22), a more ideal size is 36×24. The larger dimensions create additional room for trucks or storage. Other popular dimensions for detached three-car garages include 32×24, 34×24, and 36×28.
Light Burdens: This type of garage floor requires at least 4 inches of concrete and is suitable for one or two light cars or trucks. Medium Burdens: Average-sized vehicles and medium to large trucks require a garage floor that is 6 inches thick.
For a single-car storage building, the average garage dimensions typically range from 12 to 16 feet in width and 20 to 24 feet in depth. This size is perfect for a standard vehicle with a bit of extra room for storage or a small workbench!
On average, a one-car garage is 12 feet wide and 22 feet deep. Other common sizes are 14 x 22 feet, 16 feet x 24 feet, and 14 x 24 feet. These bigger one-car garages are great for storage space in addition to the space for your vehicle.
Site-Built 24×24 Garage Cost: Around $25,000
However, $25,000 is a good entry point for a custom, site-built garage. It is also important to note that while only a site-built garage can make use of the convenience of a concrete floor, that is not included in the $25,000 average price point.
What is the Minimum Size for a 2 Car Garage? The smallest size you would want to go for a two car garage is 20×20. Depending what size and style your vehicles are, you may be in for a very tight squeeze. However, with very careful parking, you can park smaller to regular sized cars inside..
Tandem garage plans can offer just one extra deep bay for a pair of cars, or they may offer two or more extra deep bays side-by-side accommodating four to six cars. The majority of the tandem garage plans in this collection are at least 38' feet in depth.
A concrete garage floor should be at least four to six inches thick for most residential properties. This has the capacity to hold small or average-sized cars, such as what might be found in the typical two-car garage.
3 Car Garage Size
A rough estimate for a 3-car garage would be around 36 feet wide and 24-36 feet deep; however, it could be larger or smaller depending on the specific design and layout.
The standard size for double garage doors is 16 feet wide and 7 to 8 feet high. Many of these size garage doors are designed with a pair of single 8-foot garage door bays.
Plywood, MDF, or OSB is the best material for building garage walls because it is both inexpensive and easy to work with. They may be attached to the studs with frame screws and, unlike drywall, don't necessitate any finishing touches.
Base Recommendations
The base should be 4″ thick concrete. Underneath the concrete should be a minimum of 4″ compacted hardcore. Edges should be chamfered to aid drainage.