Your garage isn’t just for your automobiles. It’s where you store supply material, tinker around, and in many homes, an easy family entrance. For the majority of homeowners, a 3 car garage is the perfect blend of space and functionality. Before you start building or rebuilding, however, you have to have the perfect 3 car garage dimensions.
The proper size will make it easier to park, amount of storage space you will have to contend with, and if it will be worth it to your home. Average size, style, floor plan, size of doors, and even space planning are all addressed in this article. By the end of this, you’ll know what will suit you.
Why a 3 Car Garage
For growing families or two-car families, a 3 car garage is an investment to make.
- Extra Car Room – Perfect for three-car families or two-car families with motorcycles, boats, or trailers parked in the third room.
- Storage Room – Perfect for sports gear, off-season use, or equipment.
- Resale Value – The larger garages occupy more salable houses.
- Flexible Use – The extra room is a workshop, home gym, or hobby room.
It has nothing whatsoever to do with parking—it is more a matter of a handy addition to your house.
Standard 3 Car Garage Sizes
Garages are generally built to standard size but with minor variations they can have significant effects.
General Dimensions:
- Width: 32–40 feet
- Depth: 20–24 feet
- Height: 7–10 feet (door clearance)
Door Sizes:
- Single Car Door: 8–9 feet wide, 7–8 feet high.
- Double Car Door: 16–18 feet wide, 7–8 feet high.
Single door and double door is one such design for 3 car garages. It proves helpful in making some space to fit cars of all sizes.
3 Car Garage Design Options
You need to design the area as per this requirement. Most commonly used designs are as discussed below:
Three Single Doors
- There are separate doors for both the cars.
- It provides the maximum privacy.
- More expensive because it has three openers and framing.
Double Door + Single Door
- Most common combination.
- Will accommodate two cars side by side and one additional bay.
- Less expensive.
Tandem Garage (Deep Design)
- Two cars parked side by side with one single bay.
- Saves space on the lot but less convenient.
Every setup has its advantages and disadvantages based on your price point budget and lot size.
Perfect Depth for a 3 Car Garage
Depth is as important as width.
- Minimum Depth: 20 feet (for small sedans and smaller SUVs).
- Convenient Depth: 22–24 feet (for trucks or large SUVs).
- Maximum Depth: 28–32 feet (for storage or a workshop).
Consider your lifestyle. Deep garages are well worth the extra cost for an in-house gym or extra storage.
Ceiling Height Considerations
The ceiling height will determine storage space and car clearance.
- Standard Height: 8 feet (ideal for most cars).
- High Clearance: 10–12 feet (for trucks, SUVs, and storage lifts).
- Others need a maximum of 14 feet for boat or RV storage.
The ideal height is future-proofed.
Storage Solutions for a 3 Car Garage
Three bays provide room to sort out.
Options Include:
- Overhead Racks – Seasonal gear that performs best.
- Wall Systems – Shelves, cabinets, and hooks keep order on equipment.
- Workbenches – Space for do-it-yourself projects.
- Loft Storage – Top shelves for bins and boxes.
Bright storage makes your garage work space.
Flooring Options
Your garage floor takes a beating. A good layer on it and it’s rather nice-looking, too.
- Concrete Sealant – Cheap protection.
- Epoxy Coating – Stain-proof, tough, and reflective.
- Rubber Mats – Workshops and gym floors adore them.
- Polished Concrete – Exquisite and low-maintenance.
A 3 car garage requires flooring that’s stylish but tough.
Insulation and Climate Control
Your garage need not be cold in the winter and hot in the summer.
- Wall Insulation – Temperature maintained constant.
- Insulated Doors – Heat loss and coldness eliminated.
- Mini-Split HVAC – Climate comfort system.
- Dehumidifiers – Remains dry and rust-free.
You are utilizing your garage daily, so it is money well spent on comfort.
Lighting and Electrical Needs
Garages with ample space require proper lighting.
- LED Ceiling Lights – Energy efficient and light providing.
- Task Lighting – Workbench and storage area.
- Exterior Lighting – Curb appeal and safety.
- Electrical Outlets – Appliance charging and tools, plus appliances.
- EV Chargers – A charger future-proofs as the electric car approaches.
A hardwired garage = function and safety.
Cost to Build a 3 Car Garage
Location, amenities, and materials drive the cost.
- Basic Build: $30,000–$50,000
- Mid-Range: $50,000–$80,000 (finishes-up finishes and materials).
- Luxury Build: $100,000+ (high-end doors, insulation, and custom storage).
Always plan to budget for flooring, storage, lighting, and climate control.
Adding Value to Your Home
A 3 car garage is not convenient—it’s the smart thing to do.
- Adds value at time of sale.
- Gives room for buyers with more than one car.
- Adds living space for functionality.
- Makes your home the standout in competitive markets.
A 3 car garage can increase the value of a home by 10–20%, say real estate experts.
Mistakes to Avoid When Planning
It is sad that so many homeowners live to regret not having planned. Do not make the following mistakes:
- Too Small Size – Plan ahead for future vehicles.
- Bad Door Placement – Plan easy in-and-out.
- No Plan For Storage – No plan = wasted space.
- Ignoring Driveway Design – Large garage requires large driveway.
- Forgetting Insulation – More expensive to add on later.
Good planning keeps your garage working for you in the future.
Garage Comparison
| Garage Type | Width | Depth | Cars | Best For |
| 1 Car Garage | 12–16 ft | 20–22 ft | 1 | Singles or small homes |
| 2 Car Garage | 20–24 ft | 20–24 ft | 2 | Small families and singles |
| 3 Car Garage | 32–40 ft | 20–24 ft | 3 | Large families, extra storage |
| 4 Car Garage | 40–50 ft | 22–28 ft | 4 | Luxury homes, car enthusiasts |
The 3 car garage is that sweet spot of form and price.
Trends in Garage Design
Garages are catching up with technology and lifestyle.
- Smart Garage Doors – App-enabled and voice-enabled.
- Solar-Powered Lighting – Energy-efficient installs.
- EV Charging Stations – The new normal in new garages.
- Flexible Spaces – Home offices, gyms, or studios in garage bays.
The new 3 car garage is not only about cars—it’s lifestyle.
Real-Life Uses of the Bonus Bay
Not all homes require three cars. That room can be used as:
- A room to work out.
- A woodworking studio.
- A play space for the kids.
- A games or recreation space.
- A home office.
This multi-functional potential makes a 3 car garage a savvy decision.
FAQs for 3 Car Garage Size
What is the average size of a 3 car garage?
Average 3 car garages are 32–40 feet wide and 20–24 feet deep.
How high should a 3 car garage be?
8 feet standard, but 10–12 feet for trucks and storage lifts.
How much does it cost to build a 3 car garage?
Cost between $30,000 and $80,000 depending on features and material.
Do 3 car garages increase the value of the house?
Yes, they deliver resale value and add 10–20% value.
How many doors is best in a 3 car garage?
A double door and a single door are most convenient.
A 3 car garage is a good investment in future value, convenience, and worth. By designing the perfect size—width, depth, and height—you are able to design a garage that will be perfect for automobiles, storage space, and future use.
Regardless of whether you need simple construction or create a beautiful multi-purpose room, proper garage size is the answer. With precise planning, your 3 car garage is not a parking garage—it’s one of the most helpful rooms in your house.