30x40x12 Red Iron Steel Building
Built for Strength. Designed for Real-World Use.
Looking for strength, durability, and long-term value?
The 30x40x12 Red Iron Building from Mason Steel Buildings Corp delivers industry-leading performance engineered to meet local codes and stand the test of time.
Whether you need a workshop, garage, small warehouse, or commercial space, this versatile structure is one of our most popular sizes.
What’s Included
- 30x40x12 Red Iron Steel Frame
- 26-Gauge PBR Panels on Roof & Walls
- Fully Engineered to Meet Local Building Codes
- 60-Year Structural Warranty
- (1) Entry Opening
- (2) Framed Garage Door Openings
- (1) Man Door Opening
Price varies by location and customization
Built with Red Iron Strength
Red iron construction provides:
- Superior structural integrity
- Long-term durability
- Resistance to warping and rot
- Lower maintenance than wood
- Better long-term investment value
This is not a light-gauge kit — this is commercial-grade steel.
Engineered for Your Location
Every Mason Steel building is:
- Designed to meet your local wind and snow loads
- Fully engineered and stamped
- Compliant with your county building department
We don’t sell “one-size-fits-all” buildings. We build for your zip code.
Customization Options
Want to modify this 30×40?
We can adjust:
We can adjust:
- Door sizes and placements
- Insulation packages
- Color selections
- Additional windows
- Lean-tos or extensions
- Increased height
This structure can also serve as a base for a future barndominium or shop-house build.
Frequently Asked Questions
It’s 1,200 square feet — comparable to a small house footprint or oversized 3-car garage.
Yes. We offer multiple insulation packages depending on climate and use.
Pricing is for the building kit. Foundation and installation can be coordinated separately.
Lead times vary by location, but we provide timelines during quoting.
Get a 30x40 Steel Building Quote Today
Ready to build?
Let’s get your engineered 30x40x12 red iron building started.
Let’s get your engineered 30x40x12 red iron building started.
Phone: 877-76-STEEL