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30x40x12 Steel Building

Welcome to Sentry Builders, where we specialize in the design and construction of the versatile 30x40x12 steel building. Perfectly suited for a variety of applications and designed to withstand the unique climate of Arizona, these buildings offer 1,200 square feet of customizable space under a 12-foot high roof. Ideal for those who need an efficient, durable structure without the need for tall equipment storage, our steel buildings are the go-to choice for light-duty manufacturing, storage, and more.

Tailored Uses for the 30x40x12 Steel Building

This compact yet spacious steel building is a perfect match for several specific needs:

  • Light-Duty Manufacturing: With ample space for equipment and materials, it’s an ideal setting for woodworking, welding, or other crafts.
  • Residential Storage: Store your vehicles, tools, and personal items with ease, keeping them secure and out of the elements.
  • Retail Space: Create a welcoming storefront or a boutique workshop space that invites customers in and showcases your products or services.
  • Small Warehouse Needs: Manage inventory and logistics from a space that’s organized and accessible.
  • Community Gatherings: Offer a durable, adaptable space for local groups, clubs, or churches looking for a meeting or activity area.

Engineered for the Arizona Climate

Sentry Steel’s 30x40x12 buildings are crafted with the Arizona climate in mind, ensuring they are:

  • Heat Resilient: Built with materials that reflect the sun’s harsh rays to maintain cooler interior temperatures.
  • Weather-Ready: Designed to stand strong against wind and rain, protecting what’s inside throughout the year.
  • Energy Efficient: Optional insulation and ventilation upgrades available to keep operational costs low and comfort high.


Why Choose Sentry Steel?

Choosing Sentry Steel means opting for a seamless, quality-driven process that delivers exactly what you need:

  • Custom Design Expertise: Our team works with you to customize your building, ensuring it meets all your specific requirements.
  • All-in-One Construction Solutions: From planning and permitting to construction and finishing touches, we handle every detail.
  • Sustainability Focus: We utilize eco-friendly materials and construction practices to minimize environmental impact.

Your Path to a New Steel Building

Creating your 30x40x12 steel building with Sentry Steel is a straightforward, customer-focused experience:

  • Initial Consultation: Share your vision and explore the potential of your new space with our team.
  • Customized Design: Tailor every aspect of your building to ensure it fits your needs perfectly.
  • Streamlined Permitting: We navigate the complexities of local regulations to get your project off the ground quickly.
  • Quality Construction: Our skilled builders bring your vision to reality with precision and care.
  • Complete Satisfaction: We make sure every detail of your new building meets your expectations and our standards.

Get Started with Sentry Steel Today

A 30x40x12 steel building offers a practical, versatile solution for anyone in Arizona looking to expand their operational space, safeguard their belongings, or create a new gathering area. Designed to endure the local climate and tailored to your needs, Sentry Steel is here to make your building project a success.

With Sentry Steel’s 30x40x12 steel buildings, you’re not just building a structure; you’re expanding your possibilities. Tailored to meet your needs and built to withstand the Arizona elements, our buildings are the perfect solution for those seeking a durable, efficient, and flexible space. Let’s build something great together.


30x40x12 Steel Building Price Break-Down

 $ 24,102.50 Complete steel building package with engineered plans ready to submit to building department, delivery included. This is the steel package price as of January 25,2024.

$ 1,380.00  Concrete foundation design & engineering Stamped, sealed and certified by an AZ certified engineer. (Required by County / City Building Dept.)

$ 1,240.00  local building department requirement verification and permit processing labor  (does not include Permit Fees)

$ 25,565.87 Concrete work — 1′ x 1′ 6″ steel reinforced foundation with 4″ thick 3000# psi floor slab poured on compacted base.

$ 4,799.78  Clopay Commercial-Industrial insulated sectional overhead door – 12’x10′ (includes installation)

$ 770.55  3’x7′ Insulated steel walk-through door with weather strip, threshold and commercial lockset with deadbolt. (includes installation)

$ 6,322.10  Insulation 4″ R-13 roof and 3″ R-10 wall insulation, both with built in radiant barrier. (includes installation)

$ 11,686.64  Building Erection, Equipment and labor to fully erect and complete your new building.

$ (3,793.37)  Economy Series Discount – 5%


$ 72,074.06 Total cost (does not include sales tax or permitting fees)

That’s just $60.06 per square foot for your 1,200 sq ft metal building.


Please note:

-Prices based on buildings erected in Maricopa or Pinal County

-Please note that prices listed below apply only to buildings with these exact specifications

-ANY additions or alterations will result in changes to the price.


Q: How quickly can my steel building be constructed?

A: Project timelines vary based on design specifics and site readiness, but our team is dedicated to efficient, timely completion and we strive to provide the highest level of communication about timelines during your project.

Q: Can I modify the interior layout in the future?

A: Yes, the versatility of steel construction allows for interior modifications to adapt to your changing needs.

Q: How do these buildings hold up in the Arizona heat?

A: Our steel buildings are specifically designed with materials and features that combat the heat, keeping the interior more comfortable.

Sentry Builders LLC

42802 N Kenworthy Rd,
San Tan Valley, AZ 85140

  • Monday-Thursday 6.30am – 4pm
  • Friday 6.30am – 3pm