Why Us
8318 cuStom builders: Why Choose us for your next ADU building
8318 Custom Builders has managed the entire ADU creation process in-house, offering you access to our expert design team, experienced permit coordinators, and skilled builders. This ensures a high-quality ADU that is both welcoming and functional, completed within a predictable timeframe of 8-12 months, avoiding common delays and budget overruns.
All ADU's are NOT the Same – Better Materials, Better Buildings
When you invest in a Custom ADU Building, you’ll get the most from your investment in a top-of-the-line, quality steel structure. Our materials, build strategt and parts – accessories offer superior engineering on several levels.
Material Specifications
| Steel Gauge | 22-12 | Bolt | Zinc Aluminum Hex Flange |
| Steel Grade | 80 & 50 | Nut | Serrated Hex Head Locking Nut |
| Manufacturer Warranty | 50 Years | Corrugation Depth | 7.5″ & 9.75″ |
Materials Features & Benefits
All hardware, parts and accessories are produced in our state-of-the-art factory
Along with the high-quality steel arch panels, our bolts are commercial-grade
SteelMaster bolts provide greater reliability and holding power
Most steel building companies don’t do corrosion resistance testing with the salt spray test
Added benefits of electrical insulation, shock absorption, and improved durability
Protective Coating
Best Anti-Corrosive Agent On the Market – Longevity And Durability
| Brand | Galvalume Plus (AZ60/AZM180) | |
| Composition | 55% Aluminum-43.4% Zinc and 1.6% silicon | |
| Corrosion Protection | 50 years | |
| Organic | Yes | |
| Smudge, Stain & Fade Protection | Yes |
“It was the easiest that I’ve ever had to deal with anybody. Customer service was awesome. It was super painless. It worked out perfectly, exactly how I was hoping it would work.”
Pete G., Hawaii
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Custom ADU Builders Save You Money AND Delivers Quality
As specialists in Custom ADU (Accessory Dwelling Unit) construction, we streamline your building process by handling all the engineering and preparatory work in advance. Our approach involves precisely cutting building materials to your specific requirements at our factory. This ensures that when your building kit arrives on-site, it’s ready for efficient assembly. Our meticulous pre-construction process means your ADU is designed, engineered, and prepared with precision, simplifying the construction phase and ensuring a seamless building experience from start to finish.
You’ll get the precision and quality of using multi-million dollar fabrication equipment at a factory without having to pay for a custom engineered structure.
When choosing Custom ADU Builders there are big advantages:
Based on our expertise and relationships with building suppliers, constructing a Custom ADU (Accessory Dwelling Unit) with us typically costs less than pursuing a fully custom project. Our standard models are engineered to optimize savings on construction expenses, offering an economical alternative without compromising quality or design. This approach provides a cost-effective solution for your building needs, leveraging our industry knowledge and supplier network to deliver value and efficiency.
The components included with your SteelMaster building are made to exacting standards of accuracy for easy assembly with predrilled holes and bolts as the only required fasteners for construction. In other words, a lot of work of measuring and drilling is already done for you!
The components included with your SteelMaster building are made to exacting standards of accuracy for easy assembly with predrilled holes and bolts as the only required fasteners for construction. In other words, a lot of work of measuring and drilling is already done for you!
Our Construction Manual Takes You Step-By-Step
The SteelMaster construction manual provides you with general step-by-step information on the assembly of your metal Quonset hut kit with illustrations.
Some of the information includes:
- Storage guidelines
- Construction and building insurance
- Installation of parts and accessories (ex. Endwalls, Windows, Skylights, Vents)
- Grouting, caulking and completing the building
- Building maintenance and preventing damage
- Warranty certificate
*Keyway foundation is standard on all buildings. Industrial Base Foundation option shown is for illustration purposes only
Expert Building Specialists and Engineers – Experience To Meet Any Engineering Challenge
Established in 1982 in Virginia Beach, Virginia, SteelMaster Buildings has served over 50,000 customers from across all 50 states and over 40 countries.
SteelMaster’s team of building experts and engineers has the experience to manage a variety of engineering requirements. We will work with you every step of the way to figure out the design and specifications you need to create the steel Quonset hut you envision.
Included with SteelMaster Building Cost
- State-stamped factory blueprints
- 50-year warranty
- In-house engineering staff
- Snow, wind & seismic load analysis
Quality Build Comfortable Living
When choosing a building, it’s important to look at all of your options. Here are some differences between pole barns and SteelMaster metal barns.
Steel Buildings vs. Fabric Buildings
From the clear span design to overall shape, steel buildings and fabric buildings seem to have a lot in common. However, there are significant differences that set SteelMaster metal buildings apart from fabric-covered structures.
Engineer For The Worst and Hope For the Best – Disaster Resistant Engineering
Technically speaking, no building company can claim that their building is 100 percent disaster proof, but our buildings are built to withstand a wide variety of environmental factors.
Engineering expertise
We’ve been designing and delivering prefabricated steel buildings for over 40 years.
Custom solutions
We can design a building to meet your specific size and storage requirements.
Built to last
Our buildings are made from commercial grade steel and protected by Galvalume Plus coating.
Limitless versatility
SteelMaster's arch-style structures can be used for virtually any application.
DIY construction
You can assemble your building with tools commonly found at your local hardware store.
Worldwide delivery
SteelMaster structures are made of a multi-panel system, so accessing difficult to reach locations is simple.
“We were searching for a more resilient construction option for us. We knew we wanted to have a building that could withstand high winds from hurricanes.”
James Morris, owner of a Shellfish Hatchery
Steel Barns vs. Pole Barns
When choosing a building, it’s important to look at all of your options. Here are some differences between pole barns and SteelMaster metal barns.
Flexible on Steel Building Delivery Process
When choosing a building, it’s important to look at all of your options. Here are some differences between pole barns and SteelMaster metal barns.
Alaska, Hawaii & Puerto Rico Specialists
When choosing a building, it’s important to look at all of your options. Here are some differences between pole barns and SteelMaster metal barns.
We Detail and Finalize the Shipping Process With You
We’re only happy when you’re happy and a big part of that is the peace of mind of knowing you have a professional team of shipping and logistics experts at your disposal.
Once your order has been approved by engineering, our dispatching team will call to schedule delivery.
The day the order leaves the factory, the transportation company will email you the estimated arrival day and contact information of the driver.
Once the driver is within 24 hours of delivery, he will contact you for a final confirmation of arrival time.
We can work directly with you to help set up and manage the shipping and delivery process. Our team of professionals has extensive knowledge of transportation document requirements including:
- Bill of ladings
- Certificate of conformity
- Export and import licensing requirements
LEED Certified Buildings – Eco-Friendly While Still Being Budget Friendly
Due to steel’s recycled content and functional properties, building products made from our steel can be credited with the maximum number of points for the Materials & Resources Credit aspect of the LEED rating system.
Our steel building products contribute positively toward points under credits 4.1 and 4.2 of the LEED rating system:
- Credit 4.1 (1 point) “Use materials with recycled content such that the sum of postconsumer recycled content plus one-half of the pre-consumer content constitutes at least10% (based on cost) of the total value of the materials in the project.”
- Credit 4.2 (1 point) “Use materials with recycled content such that the sum of post-consumer recycled content plus one-half of the pre-consumer content constitutes at least 20% of the total value of the materials in the project.”
In addition to recycled content, steel can contribute toward several other LEED credits, either directly or indirectly.
Our in-house LEED Engineer William Swafford, has received the U.S. Green Building Council’s (USCGB) Leadership in Energy and Environmental Design (LEED) Green Associate certification.