30x40 Shop

Design ideas, cost guides & workshop buying tips

A 30x40 metal shop building kit is suitable for commercial or personal use and offers a generous 1,200 sq ft of wall-to-wall open space, ideal for auto maintenance shops or home project workshops.

Our kit buildings are made with solid I-beam steel components and are designed to withstand the harshest environments, stand the test of time, and add value to your property or business.

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Base model 30 x 40 shop garage building
Small 30'x40' Shop or garage with carport
1,200 sq. ft.
1-6 Vehicles
Solid Steel
Made in USA

What's included in a building kit?

A base model 30x40 metal building kit package can easily be customized to suit your work and storage requirements.

You can choose from a variety of heights, roof styles and pitches, exterior finishes, colors, and door and window sizes to create a workshop that perfectly suits your needs.

This level of customization allows you to tailor the space for your specific storage or project requirements, ensuring it seamlessly complements your existing structures.

  • What's Included

    Building packages include:

    • Steel I-Beam framing
    • Steel roof & wall panels (26ga)
    • Complete trim package
    • Two framed door openings
    • Foundation anchor bolt plans
    • Engineer stamped plans
    • Building kit delivery
    • Installation instructions
    • All bolts, flashing & sealants

    Framing for Pre-Engineered Steel Building
    I-beam steel framing
  • Features

    Benefit from:

    • Bolt-up construction
    • Trussless roof design
    • Clearspan widths to 300'
    • Certified to 160 MPH wind
    • Certified to 110 PSF snow
    • 30+ year warranty
    • Fast, free delivery
    • Fast build times

  • Customization

    Custom options:

    Doors - Choose from overhead doors, rollup, sliding or bifold door options.

    Roof profile & pitch - Adjust the gable roof pitch or select a single-slope, gambrel, or monitor profile

    Insulation - Opt for vinyl-faced fiberglass, spray foam, or insulated metal panels (IMPs).

    Structural upgrades - Add porches, overhangs, a carport lean-to, or a mezzanine for loft storage.

  • Exclusions

    Items not included:

    • Permits
    • Foundation
    • Installation
    • Insulation
    • Interior build out

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Installed price from: $25 - $45 Per Sq Ft

How much does a 30x40 shop cost?

The average installed cost of a 30x40 shop is $39,600. This includes the average cost of the steel building kit package, at $24,000, the concrete slab foundation, at $7,200, and construction, at $8,400. Your budget should also consider doors, windows, and insulation if necessary.

Final costs will vary depending on the location of the building site, local labor costs, and the complexity of the building's design. Please use our quote request form for accurate written quotes from four competing suppliers, or for a quick 30x40 building estimate, see our metal building prices page.


Item Square Foot Cost
Building kit (shell) $15-$25
Foundation $5-$10
Construction $5-$10
Interior Finishing $10-$50+

Installing 30×40 metal buildings

Qualified and trained installers typically undertake the installation of our 30×40 metal workshop buildings, which can be completed in around 2 - 3 days.

Site prep and concrete foundations

Before building your new structure, you'll need to prepare the site. This involves grading the land for a level foundation and clearing any brush or debris.

Most garages benefit from a concrete slab for a sturdy and stable surface. However, a dirt floor is an option if that suits your needs. In that case, only piers or support posts would be required.

Choosing the right slab thickness: The thickness of your concrete slab depends on the weight it will need to support:

  • Light loads (1-2 cars or small trucks): A minimum thickness of 4 inches is recommended.
  • Medium loads (1-2 medium-sized trucks): A thickness of 6 inches is recommended for optimal support.
concrete slab for metal building

Construction options

There are three main routes you can take to construct a metal building:

DIY: only recommended for those with prior construction experience, knowledge of local building codes, and the necessary tools.

Self-Manage (Hiring Subcontractors): Hiring and managing subcontractors is time-consuming, but it is more cost-effective than hiring a GC.

Hire a General Contractor (GC): Most hands-off approach, the GC manages the entire project from start to finish. This costs more (15-20%) but saves time and ensures a professional, code-compliant build.

Steel building installation

Interior finishing

The final steps involve installing utilities and adding insulation for climate control.

For additional space, consider framing separate areas like a bathroom, office, or living quarters using either wood or steel studs and drywall for a finished look.

Alternatively, a mezzanine can be installed if a loft area is desired. To accommodate this, plan for a taller eave height of 14 to 16 feet.

Mezzanine level in new metal building

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Frequently asked questions

  • How many lights are required in a 30'x40' shop?

    Light levels, measured in foot-candles (fc), vary by shop type: 20-40 fc for storage, 40-60 fc for production work, and 60+ fc for high-production commercial shops. A 30' x 40' shop with an 8ft ceiling aiming for 50fc, using 96-watt and 24-watt LED lights spaced 10ft apart, requires roughly 15-20 lights to meet most illumination requirements.

  • How much does it cost to wire a 30×40 shop?

    When planning your new shop's electrical wiring, consider labor rates, wiring complexity, distance from the existing electrical service, and materials used. Expect to pay roughly $3 to $7 per square foot, totaling $3,600 to $8,400 for a 30x40 shop. This includes the cost of electrical wiring, outlets, switches, and fixtures.

  • Will I need a permit for a new workshop?

    Within city limits, constructing a new garage or workshop typically requires a permit, though it might not be necessary for farmland. It's crucial to check with your local building department about the specific permits needed. The primary permits include the Building Permit, ensuring compliance with safety and building codes, and the Zoning Permit, confirming adherence to property zoning regulations, which may restrict the size or type of structures in residential areas.

  • How many cars can you fit in a 30' x 40' shop?

    A shop building measuring 30 feet by 40 feet can comfortably store 4 cars or trucks with room for up to 8 vehicles for long-term storage. Installing work bays along the front sidewall is ideal for daily use, while doors at both ends support a drive-through setup, allowing for straightforward vehicle passage without reversing.

  • What is the best height for a shop?

    When planning your workshop height, consider both your planned activities and stored items. Remember, the door opening needs 2 feet of clearance from the roof overhang (eave). For most uses, a 12' eave with a standard 10' opening works well. For car lifts, choose a 14' eave with a 12' opening, and for oversized vehicles, go with a 16' eave and a 14' opening.

Why choose us?

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Since 2004, over 200K buyers have saved an average of 28% on their project with our multiple quote service.

Proudly serving customers in the United States & Canada for over 20 years.

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