30x40 Garage
An oversized 30x40 garage offers a generous 1,200 sq ft of usable, column-free space that will comfortably shelter 3-4 cars and still offer plenty of work or project space. Or, for storage purposes, you could squeeze in up to 6 cars (depending on door configuration).
Start by letting us know about your access requirements, and our suppliers will assist you in designing an ideal layout. Apply for multiple quotes.
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Sample Garage Designs & Layouts
By customizing one of our 30x40 steel building kit packages, you can get exactly the garage you need with doors sized and positioned to accommodate four to six vehicles.
Listed below are some examples of the most popular 30x40 garage designs, showing various door configurations for typical setups.
Please note: sample designs and layouts are for inspirational purposes, as all kits are custom-made for your specific requirements.
Standard 30x40 Garage
Basic design for up to six vehicles
A standard metal garage building will comfortably house three cars and provide over 400 square feet of storage or workspace. You could max out at six cars or four full-sized trucks with an additional overhead door. This configuration also benefits from five 4x3 windows and two entrance doors, providing easy access via the front and side of the structure.
Layout & Specs
| Specifications: | |
|---|---|
| Dimensions | 30x40x12 |
| Roof style/pitch | Gable, 2:12 |
| Overhead doors | One 12x10 |
| Entry doors | Two 3x7 |
| Windows | Five 4x3 |
Drive Through Garage
Pull through configuration for boats & trailers
Layout & Specs
| Specifications: | |
|---|---|
| Dimensions | 30x40x12 |
| Roof style/pitch | Gable, 4:12 |
| Overhead doors | Two 12x12 |
| Entry doors | One 3x7 |
| Windows | Six 4x3 |
Three Car Metal Garage
Large garage with 2 bays and 3 parking stalls
Layout & Specs
| Specifications: | |
|---|---|
| Dimensions | 30x40x12 |
| Roof style/pitch | Gable, 4:12 |
| Overhead doors | One 16x10, one 12x10 |
| Entry doors | One 3x7 |
| Windows | Seven 4x3 |
Large Garage with Carport
Garage with additional lean-to storage
Layout & Specs
| Specifications: | |
|---|---|
| Dimensions | 30x40x12 |
| Roof style/pitch | Gable, 4:12 |
| Overhead doors | Two 10x12 |
| Entry doors | One 3x7 |
| Windows | Six 4x3 |
The 3-Bay, 3-Car Design
Large three bay garage
Layout & Specs
| Specifications: | |
|---|---|
| Dimensions | 30x40x12 |
| Roof style/pitch | Gable, 4:12 |
| Overhead doors | Three 10x10 |
| Entry doors | One 3070 |
| Windows | Seven 6x3 |
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30x50 Garage
With a 30' x 50' garage, you get 1,500 sq ft of usable, clear-span space that can be designed as a comfortable 4 car garage with 500 sq ft of bonus space or adjust the layout for use as a drive through garage for boats and trailers. Or, for longer-term purposes, you can securely store up to nine vehicles. View our collection of custom garage buildings.
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40x60 Garage (6 to 12 cars)
A 40x60 garage is one of the most versatile garaging solutions available if you need an oversized garage. At 2,400 square feet, this garage makes a great 6-car garage with an additional 900 sq ft of storage or workspace. Or, for long-term vehicle storage, you can house a maximum of twelve regular-sized vehicles. Also, consider adding a lean-to carport for additional covered parking space or partition off part of the interior and add office space and a bathroom. See our sample designs and layouts.
View this kitCommon Questions
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How many cars fit in a 30 x 40 garage?
A 30x40 steel building will comfortably shelter four cars or trucks. If you intend to use your garage daily, we recommend installing doors at each end of the structure for easy access. Alternatively, if it's for vehicle storage purposes, you could squeeze in 8 cars or 6 full-size SUVs.
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How thick should a concrete slab be?
Typical steel frame garages require a 4" floating foundation. If you are storing heavy commercial equipment or installing car lifts, then a 6" foundation will be required.
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What size doors do I need?
For cars and trucks you will need an 8x8 door as a minimum; consider adding a 10x8 to give you more room when backing in. If you need a double door this would need to be 16x8. For box trailers or boat storage, you will want to consider either 10' or 12' high doors to allow adequate clearance.
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Can I source and add my own doors?
Yes, our suppliers are happy to quote for your new building, either with or without doors. Ask for a quote with doors. That way, you can compare with doors you can source locally.
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