The Complete Guide On 3 Car Garage Dimensions

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The Complete Guide On 3-Car Garage Dimensions

The Complete Guide On 3 Car Garage Dimensions
  • July 4, 2024

Drive In, Drive Out – With Ease

Are you tired of parking your vehicles on the street? Or do you have to squeeze household items to ensure your car enters the existing garage space? It’s time to get 3 car garage so you can park cars and store your household items comfortably. Here is the complete guide on choosing three car metal garage for your lot.

Standard 3 Car Garage Dimensions: 30’ x 20’

  • Width: 30 to 36 feet
  • Length: 20 to 24 feet
  • Height: 10 to 14 feet

A typical 3 car steel garage is about 36 feet in length and 20 feet in depth. You can, of course, choose a larger and wider garage based on the land area available to you. If you wish for extra spacing to create a storage nook or a DIY workshop for weekends, a 42 x 20 garage will be suitable.

Note: Here, we are talking about a side entry metal garage that enables you to park three cars separately. You can park in and drive out of one car without removing another one.

Minimum Space Required For A 3 Car Garage: 30’ x 18’

  • 30 feet long
  • 18 feet wide

Note: This size can fit three regular sedan cars. You will have to measure all the vehicles to keep them of different types and models.

How To Measure The Minimum Size For Your Garage?

Let’s calculate the minimum three car garage size that you will need:

Length: Measure the width to the car’s fullest. Include side mirrors and at least the driver’s side of the car door so you can open and enter without bumping into another vehicle. Add all vehicle’s width plus one foot extra. This is your final length.

Width: Measure the length of the longest vehicle to calculate the total depth. Add one foot extra to allow movement freely.


  • For height, choose the tallest vehicle’s vertical length.
  • Do not forget to include any antenna or shark fin.
  • If parking an RV, include the additional roof space for vents or skylight.

Tips For Maximizing Storage In Three Car Garage

Opt For A Detached Garage

A detached garage offers more security and can be converted into a desirable space anytime. It can store inflammable gas cans, paints, and other stuff that you can’t store in your home. If you opt for a larger garage, you can create a dedicated section for storing household items, such as garden tools, equipment, etc., by installing vertical racks, cabinets, and container drawers.

Choose Tall Garage

By choosing extra height, you can create loft space. This area can then be used as a home office, theater, living room, small library, or to pursue your hobbies. Residential garages can be as tall as 20 feet or even more, depending on your local building codes and zoning guidelines.

Multi-Functional: Park, Store, and Protect

Almost a quarter of Americans have a 3-car garage, and this number isn’t going down anytime soon. So, installing a three car garage takes your property to the top list for re-sale. As a homeowner, you can renovate it into an in-law suite or guest house. 

Doors & Windows

Opt for individual doors for each car so you don’t have to open gates wide to take out just one car. If you plan a storage or workshop, opt for a separate walk-in door. You can install windows or clerestory windows for lighting and air circulation inside.  

Design Ideas For An Efficient 3 Car Garage Dimensions & Layout

Dimension: Choose a dimension that suits your lot size. An excessively large garage will make your property look cluttered and take up a lot of yard space, and a small garage will be unfit for any use.

Driveway: Opt for a wider driveway so that cars can easily maneuver. You can add local flowers around the driveway to boost curb appeal. There is no set standard, but safety and maneuverability are crucial.

Layout: You can choose a straight layout, where each car will have its own doors and parking space. This will take up a lot of space, though. You can also opt for an L-shaped or T-shaped layout to create parking space for two vehicles and extra space for a workshop or additional storage.

Common Mistakes To Avoid When Planning A Three Car Garage

Mistake #1. Choose insufficient space to accommodate all vehicles and storage needs.

Mistake #2. Not having proper planning permission is another issue that can get you in trouble. Factors like three car garage size, height, and steel gauge can affect planning permission.

Mistake #3. Underestimating zoning laws and setback rules can result in penalties or the structure’s removal from the garage.

Mistake #4. Ignoring electric lines and outlets for power, charging, or supporting heavy workshop tools.

Mistake #5. Ignoring energy efficiency, proper insulation, and ventilation inside the garage.

Cost Consideration For Its Construction

The total cost is based on 3 car garage dimensions. Remember, the more metal there is, the more cost will be. However, the simpler the design, the lower it will be priced. So, opt for the necessary add-ons. If you don’t need a loft area, choose height based on the tallest vehicle you want to park.

These are the factors on which 3 car steel garage depends:

  1. Height
  2. Size
  3. Location
  4. Roofing style
  5. Accessories
  6. Local rules (12 or 14 gauge frame)
  7. Land cost (if you don’t own one)

Note: The cost per square foot decreases with the size of the steel garages. So, a 40 x 70 garage will cost less (per sq. ft.) than a 30 x 40 one. We have been delivering top-notch metal garages from concept to completion for years.

There are multiple benefits of having larger garage space that you can use for your personal or commercial applications.

Build Your Car Sanctuary With Viking Metal Garages

Get colors that match your existing property for a seamless appearance. We have plenty of sizes and designs that fit your needs and preferences. Talk to us at (704)-741-1587 to get your tailored three car garage.

What you order is what we deliver!