Average Size Of A Three Car Garage

The Average Size of a Three-Car Garage

A three-car garage is a common feature in many homes, providing ample space for parking vehicles, storing tools and equipment, and even serving as a workshop or hobby space. Understanding the average size of a three-car garage is essential for planning purposes, whether you’re building a new home or renovating an existing one.


A three-car garage is a detached or attached structure designed to accommodate three vehicles. It typically consists of three bays, each with its own separate entrance and exit. The bays may be of equal size or vary in width to accommodate different vehicle sizes.


Three-car garages come in various types, including:

  • Standard: A standard three-car garage is typically rectangular in shape and measures around 20 feet wide by 30 feet long (6.1 meters by 9.1 meters). This provides enough space for three average-sized vehicles.
  • Extended: An extended three-car garage is larger than a standard garage, measuring around 24 feet wide by 36 feet long (7.3 meters by 11 meters). This additional space allows for larger vehicles or extra storage.
  • Tandem: A tandem three-car garage is designed to park vehicles in a single line, with one vehicle parked behind the other. This type of garage is more compact and typically measures around 16 feet wide by 40 feet long (4.9 meters by 12.2 meters).


The primary difference between a three-car garage and a two-car garage is the number of bays and the overall size. Three-car garages are wider and longer to accommodate an additional vehicle.

Ease of Use

Three-car garages offer several advantages over smaller garages:

  • Convenience: Ample space for parking multiple vehicles without the need for cramped maneuvering.
  • Storage: Additional space for storing tools, equipment, seasonal items, and other belongings.
  • Versatility: Can be used as a workshop, hobby space, or even a home gym.

Process of Building a Three-Car Garage

Building a three-car garage involves several steps:

  • Planning: Determine the type of garage, size, and location.
  • Permitting: Obtain necessary building permits from local authorities.
  • Foundation: Lay the foundation for the garage, ensuring proper drainage and support.
  • Framing: Construct the walls, roof, and other structural elements.
  • Exterior: Install siding, roofing, and other exterior finishes.
  • Interior: Finish the interior with drywall, flooring, and lighting.
  • Utilities: Connect the garage to electrical, plumbing, and HVAC systems.

Advantages of a Three-Car Garage

  • Increased storage space: Ample room for vehicles, tools, equipment, and other items.
  • Enhanced curb appeal: A well-designed three-car garage can improve the overall appearance of a home.
  • Increased property value: A three-car garage can add value to a property, especially in areas where parking is limited.

Disadvantages of a Three-Car Garage

  • Cost: Building and maintaining a three-car garage can be more expensive than smaller garages.
  • Space requirements: Requires a larger lot size to accommodate the garage and its driveway.
  • Maintenance: Regular maintenance, such as painting and roof repairs, is necessary to keep the garage in good condition.

How to Choose the Right Size Three-Car Garage

Consider the following factors when choosing the right size three-car garage:

  • Vehicle size: Determine the size of your vehicles to ensure they fit comfortably in the garage.
  • Storage needs: Estimate the amount of storage space you require for tools, equipment, and other items.
  • Future plans: Consider any potential future needs, such as additional vehicles or a workshop space.

What to Look for in a Three-Car Garage

When looking for a three-car garage, pay attention to the following features:

  • Structural integrity: Ensure the garage is well-built and structurally sound.
  • Insulation: Proper insulation helps regulate temperature and reduce energy costs.
  • Lighting: Adequate lighting is essential for safety and convenience.
  • Ventilation: Good ventilation prevents moisture buildup and ensures a healthy indoor environment.


The average size of a three-car garage varies depending on factors such as vehicle size, storage needs, and personal preferences. Understanding the different types, advantages, and disadvantages of three-car garages is crucial for making an informed decision. By carefully considering the size and features of a three-car garage, you can create a functional and valuable addition to your home.


Q: What is the most common size for a three-car garage?
A: The most common size for a three-car garage is 20 feet wide by 30 feet long (6.1 meters by 9.1 meters).

Q: How much does it cost to build a three-car garage?
A: The cost of building a three-car garage varies depending on factors such as location, materials, and labor costs. On average, it can range from $20,000 to $50,000.

Q: Can I convert a two-car garage into a three-car garage?
A: Yes, it is possible to convert a two-car garage into a three-car garage by extending the width or length of the garage. However, it is important to consult with a qualified contractor to ensure structural integrity and compliance with building codes.

Q: What are the benefits of having a three-car garage?
A: The benefits of having a three-car garage include increased storage space, enhanced curb appeal, and increased property value.

Q: What are the drawbacks of having a three-car garage?
A: The drawbacks of having a three-car garage include higher building and maintenance costs, as well as the need for a larger lot size.

Closing Statement

Choosing the right size three-car garage is essential for meeting your parking, storage, and lifestyle needs. By considering the factors discussed in this article, you can make an informed decision that will provide you with a functional and valuable addition to your home.


The information provided in this article is for general guidance only and should not be considered as professional advice. It is recommended to consult with qualified professionals, such as architects, engineers, or contractors, for specific guidance and recommendations regarding the size, design, and construction of a three-car garage.