Metal Building Permits in Washington: Snow Loads, Plans and Costs

People often toss around the word "gauge" when discussing metal buildings, but few stop to consider what it really means. For steel, its gauge is a system of determining how thick it is. The smaller the number, the thicker the material.

What Is Gauge?

Most metal buildings utilize 14-gauge steel for their framing. It’s light, sturdy, and can hold its own in most scenarios. However, some environments with higher wind speeds and snowfall demand thicker 12-gauge framing to carry the load and pass local building requirements.

And while you might not notice much of a difference in performance at first, that beefier framing makes it a lot harder for nature to bend or twist your structure out of shape.

Key Highlights

• 12-gauge = thicker and stronger
• 14-gauge = good for most small to mid-size builds
• Lower gauge = better wind and snow performance
• 12-gauge holds shape longer under stress
• Often comes with a better warranty
• Price bump is small compared to the upgrade in strength

Steel Gauge Chart

How Gauge Impacts Loads

Thicker framing doesn’t just sound tougher. It is tougher. Heavier steel stands up better to snow buildup, hard gusts, and the added stress from longer spans.

Engineers run the numbers for wind and snow loads based on ASCE 7 standards. Using this system, buildings can be rated for anywhere from 115 to 170 mph winds and 20–60 psf snow loads.

The local requirements for wind and snow loads depend on location, open exposure, and roof pitch. For example, a building sitting on a hill or near the coast deals with more pressure than one behind trees.

Upgrading to 12-Gauge Framing

At what point should you consider upgrading?

• High Wind Speeds

If your metal building will sit in an area with high wind speed calculations, you may need to upgrade to thicker framing to prevent swaying or failure.

• Heavy Snow Regions:

If you expect to see your fair share of deep snows this winter, upgrading your framing thickness is a smart move.

• Longer, Bigger Buildings:

Longer spans put more stress on the frame of your pre-engineered metal building.

• Certification Needs

Higher wind or snow ratings often call for thicker 12-gauge.

• Lower Maintenance:

Thicker steel can last longer and require fewer repairs over the course of its life.

Cost and Warranty Changes with Framing Upgrades

You can expect a small price increase when you upgrade from 14-gauge to 12-gauge framing. You pay for thicker steel, heavier anchors, and reinforced braces to match it. Usually, you’re looking at around 10–15% more on the framing side.

However, that extra spend often gets you a longer rust-through warranty, sometimes 25 years instead of 20. The thicker galvanizing takes longer to wear down, especially in damp or coastal areas.

So, while the up-front cost stings a little, you’re getting fewer repairs, less movement, and a frame that won’t quit early. In the long run, it’s usually worth every bit.

Frequently Asked Questions about Framing Gauges for Metal Buildings

Do you have questions about framing gauge, and which thickness is best for you? Below, we’ve answered some of the questions we see on this subject the most:

Is 12-GA stronger than 14-GA?

Answer: Yeah. It’s thicker, heavier, and stiffer under load.

What’s the real thickness difference?

Answer: 12-ga steel is about 0.1046 inches thick, while 14-ga runs around 0.0747 in.

Does 12-GA automatically mean better wind or snow ratings?

Answer: Not by itself. The full design, including anchors, trusses, and layout, plays a role. But thicker framing helps you hit higher numbers.

Does the 20-year rust warranty only cover 12-GA?

Answer: Usually, the heavier gauge gets longer coverage. Some 14-ga options still offer 20 years, but 12-ga often goes a few years beyond that.

Building a metal structure in Washington involves more than choosing a size, roof style, and door configuration. Depending on where the property is located, your project may need to account for snow loads, seismic design, wind exposure, zoning setbacks, critical areas, and other local requirements.

Washington's conditions vary significantly from one part of the state to another. A building in Tacoma may have very different structural requirements from one in Spokane or a mountain community in Chelan County. Your exact property address helps determine which design criteria apply.

This guide explains when a permit is typically required, which building codes apply in 2026, how Washington snow loads affect metal building plans, and what to expect when ordering an engineered metal building for your property.

Key Highlights

• Most enclosed metal buildings over 200 square feet require a building permit, although exemptions vary by jurisdiction and use.
• Some rural areas allow certain detached structures up to 400 square feet to remain permit-exempt.
• Agricultural buildings used exclusively for qualifying farm purposes may receive special permit exemptions.
• Washington's current statewide building codes are based on the 2021 editions with Washington amendments.
• The 2024 code editions are scheduled to take effect May 3, 2027.
• Snow loads can increase substantially with elevation, making the exact property address important for engineering.
• Western Washington typically has greater seismic considerations, while eastern and mountain areas often have greater snow and freezing concerns.
• A site plan, engineered drawings, and local design criteria may be needed before a metal building permit can be approved.
• Your building should be engineered for the actual conditions at the installation site rather than relying on a statewide snow or wind number.

Do You Need a Permit for a Metal Building in Washington?

Whether you need a permit depends on the building's size, use, location, and how your local jurisdiction handles permit exemptions. A small detached storage shed may qualify for an exemption, while a garage, workshop, commercial building, or large carport will generally require a permit.

Rural properties can have different exemptions than properties inside an urban growth area. For example, Snohomish County allows certain non-habitable structures up to 400 square feet outside designated urban growth areas, while limiting the same type of exemption to 200 square feet inside those areas. Other jurisdictions have their own rules, so checking with the local building department before ordering is important.

Even when a structure is exempt from a building permit, that does not automatically exempt it from zoning setbacks, critical-area restrictions, shoreline requirements, or specialty permits.

Which Building Codes Apply in Washington in 2026?

Washington's current State Building Code is based on the 2021 editions of the International Building Code, International Residential Code, International Mechanical Code, International Fire Code, Uniform Plumbing Code, and related state amendments. The Washington State Energy Code also applies based on the type of building and occupancy.

The state is transitioning to the 2024 editions of its building codes. These 2024 codes are scheduled to become effective statewide on May 3, 2027. For projects submitted under the current code cycle, a complete permit application submitted before the effective date is generally reviewed under the codes and land-use regulations applicable when the application is vested.

Washington Snow Loads and Why Your Address Matters

Washington does not have one snow-load number that applies to every metal building. Snow loads are influenced heavily by elevation and location. The Structural Engineers Association of Washington (SEAW) Snow Load Analysis for Washington is an important reference used by jurisdictions, while structural design also follows the applicable building code and ASCE 7 requirements. Local authorities can provide the design criteria for a specific parcel.

Your address matters because snow conditions can change dramatically over relatively short distances. A low-elevation property in western Washington may have a relatively modest ground snow load, while a property farther east or at higher elevation can require substantially greater structural capacity. Snow drifting, roof shape, exposure, adjacent structures, and other conditions can also affect the final design.

The following figures provide examples of the differences that can occur across Washington. They should be treated as representative jurisdictional information rather than a substitute for site-specific values from the local building department.

The exact values used on engineered drawings can differ from these general examples. For a new metal building, provide the manufacturer or engineer with the complete site address so the building can be designed for the appropriate local conditions.

Planning a permit-ready building? Review our guide to certified metal building permits as you prepare your drawings and site information.

Seismic and Wind Considerations

Earthquake Design

Earthquake design is an important consideration for metal buildings in Washington, particularly in western Washington. Much of the Puget Sound region falls within higher seismic design categories, which means the structural system, connections, anchoring, and foundation may need to account for earthquake forces.

Seismic design is one reason a building designed for another state or location should not simply be reused in Washington without reviewing its engineering. The structural plans need to reflect the conditions at the actual building site.

Wind and Coastal Regions

Wind requirements also vary by location and exposure. Open terrain, coastal areas, large bodies of water, and other site conditions can influence the wind exposure used for engineering.

A metal building in an open rural area may experience different wind forces than a similar building surrounded by trees and other structures. Coastal properties can also require additional attention to wind exposure and corrosion-resistant materials.

Other Washington Rules That Can Slow a Project

A building permit is only one part of the approval process. Depending on the property, you may also need to address land-use regulations, environmental restrictions, contractor requirements, and private property rules. Checking these items early can help prevent changes after the building has already been designed.

• Zoning setbacks: Your building may need to maintain minimum distances from property lines, roads, neighboring structures, or other features.
• Critical areas: Wetlands, streams, steep slopes, flood areas, and other designated critical areas can affect where a building can be placed.
• Shorelines: Properties near lakes, rivers, marine waters, and other regulated shorelines may be subject to additional review under local shoreline programs.
• Contractor registration: Washington contractors generally must meet state registration requirements, and permit applications can require contractor information.
• HOA rules: A homeowner’s association may have architectural or property restrictions that apply even when a building meets local government requirements.

Planning for a Washington Metal Building Permit

The easiest way to keep a permit application moving is to collect the information needed for design before finalizing the building. Your local jurisdiction can tell you which documents are required, while the building manufacturer can use your site information to prepare the appropriate engineered package.

Washington Metal Building Permit Checklist

• Property address and parcel number
• Zoning and land-use requirements
• Urban growth area status, if applicable
• Required building setbacks
• Snow-load value
• Wind speed and exposure
• Seismic design category
• Frost-depth requirements
• Site plan or plot plan
• Building dimensions and sidewall height
• Door and window locations
• Intended building use
• Engineered structural drawings
• Foundation and concrete requirements
• Electrical, plumbing, or mechanical plans if applicable
• Critical-area or shoreline review if applicable
• Contractor information
• Permit application and local fees

Getting these details together before construction begins can make the process much more straightforward.

How a Washington Permit Fits into Your ENGINEERED METAL BUILDINGS Order

The permit process can be worked into the normal building-order process rather than treated as a completely separate project. The most important step is providing the exact property information so the building can be engineered for the location.

1. Call your county or city with your parcel number Ask for the applicable snow, wind, and seismic values along with permit, zoning, setback, and site-plan requirements.
2. Design your building online Choose the size, height, roof style, doors, and other features you need, then provide ENGINEERED METAL BUILDINGS with your exact site address.
3. Place your order and receive engineered drawings The building can then be designed around the required site-specific loads and other engineering criteria.
4. Submit the drawings and site plan to your building department Your local jurisdiction will review the plans and identify any additional information or approvals required.
5. Prepare your site and pour the concrete according to the approved drawings. The foundation should be constructed to the requirements shown in the engineered plans rather than being poured based only on a general building size.
6. Send Engineered Metal Buildings your approved permit and site photos Once the required approvals and site conditions are confirmed, installation can be scheduled.

Ready to plan your Washington build? Design Your Building Online, then call (208) 572-1441 to discuss your location-specific engineering requirements and get a free quote.

Which Metal Building Fits Your Part of Washington?

Washington's geography makes the ideal metal building different from one region to another. A rain-heavy property near Tacoma may benefit from a different setup than a farm in the Tri-Cities or a workshop near Spokane. The table below provides a starting point for matching common Washington conditions with building configurations.

Western Washington Garages for Rain and Seismic Conditions

For homeowners in the Puget Sound region, an enclosed garage can provide protection from frequent rain while giving you secure storage throughout the year. A vertical roof helps direct water away from the structure, while vertical siding creates a clean enclosed exterior.

A concrete slab and appropriate condensation-control strategy are also worth considering when the building will be enclosed and used for vehicles, tools, or equipment.

Higher-Elevation Buildings for Snow

Properties in the Cascade foothills and mountain communities can see snow loads increase quickly with elevation. These locations may require stronger structural components and additional engineering compared with lowland properties.

A vertical roof can be a practical choice because its panel configuration is designed to shed water and snow efficiently. The final snow rating should always be based on the building's actual location and engineering requirements.

Central Washington Equipment Storage

Central Washington offers many properties suited to agricultural buildings, equipment covers, and commercial structures. The dry climate can make an open-sided structure attractive for equipment that needs convenient access while still benefiting from overhead protection.

For these projects, wind-rated anchoring and an appropriate structural design are important. A partially enclosed building can also provide a balance between accessibility and protection.

Eastern Washington Workshops and Garages

Spokane and other parts of eastern Washington experience colder winters and greater snow loads than many western Washington communities. An enclosed workshop or garage can provide useful year-round space for vehicles, equipment, fabrication, or other projects.

For heated buildings, insulation should be considered during the initial design rather than treated as an afterthought. The building envelope, doors, roof, and wall system can all affect how efficiently the space performs.

Compare more options for your property. Browse our metal garages and metal barns to explore layouts before selecting a configuration.

Engineered Metal Buildings is Your Source for Metal Buildings in Washington

Engineered Metal Buildings offers a wide selection of metal buildings, garages, workshops, barns, equipment storage, RVs, commercial applications, and more. Our structures are made with premium steel, engineered to meet your wind, snow, and seismic loads, and customizable for any application you have in mind.

From vertical roof garages to larger commercial and clear-span buildings, Engineered Metal Buildings can help you find a configuration that fits your lifestyle. If you're ready to start planning your Washington metal building, call us at (208) 572-1441 for a FREE quote.

Conclusion

Getting a metal building permitted in Washington starts with understanding the conditions at your specific property. Snow loads can change with elevation, seismic requirements vary by region, and local jurisdictions can have their own rules for setbacks, critical areas, agricultural buildings, and permit exemptions.

Whether you need a garage in western Washington, a workshop near Spokane, an equipment building in Central Washington, or an RV cover elsewhere in the state, Engineered Metal Buildings can help you plan a structure that fits your property and intended use.

Want to know more? Call our building experts today at (208) 572-1441 or design your own structure at engineeredmetalbuildings.com

A 60x100 steel building provides 6,000 square feet of space under one roof, giving businesses, contractors, farmers, and property owners plenty of room for equipment, vehicles, inventory, fabrication, storage, and other commercial uses. With a 60-foot-wide clear-span design, this footprint can create a large open interior without columns interfering with equipment movement or workspace.

How much does a 60x100 steel building cost? The price of a 60x100 steel building depends on its height, structural requirements, doors, roof configuration, local wind and snow loads, and intended use. Current Engineered Metal Buildings models in this size range are listed at roughly $108,700 to $119,500, or approximately $18–$20 per square foot before the cost of the concrete foundation and site work.

A large commercial building also requires more planning than a smaller garage or storage building. This guide breaks down 60x100 steel building costs in 2026, compares warehouse and workshop configurations, explains why larger buildings can have a lower cost per square foot, and covers the permits and building-code requirements you should consider before starting your project.

How Much Does a 60x100 Steel Building Cost in 2026?

A 60x100 steel building costs approximately $108,700 to $119,500 for the EMB models covered in this guide. Since a 60x100 building contains 6,000 square feet, that works out to roughly $18–$20 per square foot for the building itself. A concrete slab can add another $36,000–$72,000 depending on local construction costs and the requirements of the project.

These figures are useful for initial budgeting, but the actual price of a 60x100 building depends on your location and configuration.

60x100 Models from Engineered Metal Buildings

EMB offers several 60x100 configurations designed around different commercial applications. The examples below show how the building's height, doors, and features can change the way a 6,000-square-foot structure is used.

60x100x14 Commercial Clear Span Garage

The 60x100x14 Commercial Clear Span Garage is listed at approximately $108,690. The fully enclosed building includes ten 12x12 garage doors along the side, two 10x10 doors, and four walk-in doors. This configuration can work particularly well for fleet parking, rental storage bays, or a contractor yard where multiple access points make it easier to move vehicles and equipment throughout the building.

Product: 60x100 Commercial Clear Span Garage

60x100x16 Workshop Building

The 60x100x16 Workshop Building is listed at approximately $117,955 and provides 6,000 square feet of enclosed space. It includes three 14x14 roll-up doors and a walk-in door. The taller sidewalls and large doors make this configuration well suited to fabrication shops, repair facilities, equipment service, and other businesses that need room for vehicles and large machinery.

Product: 60x100x16 Workshop Building

60x100x18 A-Frame Warehouse

The 60x100x18 A-Frame Warehouse is listed at approximately $119,450. It features 18-foot sidewalls, two 12x12 commercial doors, a walk-in door, and 34 skylights for natural light. This configuration can be a good fit for businesses that need vertical storage space for pallet racking, inventory, distribution, or other warehouse operations.

Product: 60x100 Steel Warehouse with Skylights

Warehouse vs. Workshop: How the 60x100 Setup Changes

A 60x100 building can serve as either a warehouse or workshop, but the ideal configuration can look very different depending on how the space will be used. Warehouses generally benefit from height, open floor space, and efficient loading access, while workshops often need more doors and space for vehicles, equipment, workstations, and employees.

The right configuration depends on what happens inside the building. A warehouse focused on pallet storage may benefit from additional height, while a repair shop may get more value from multiple large doors positioned around the building.

Choosing between warehouse storage and a working shop? Explore our warehouse buildings and workshop buildings to compare configurations before selecting your 60x100 layout.

Bigger Buildings Cost Less per Square Foot

Larger metal buildings often have a lower price per square foot because certain structural and installation costs are spread across more usable space. That does not mean a larger building costs less overall, but the additional square footage can provide more space for each dollar spent on the building itself.

The following EMB examples illustrate this trend:

These examples are not a guarantee that every larger building will have a lower per-square-foot price. Customization, engineering requirements, doors, insulation, site conditions, and local building codes can all change the calculation.

What Changes the Price of a 60x100 Steel Building?

At 6,000 square feet, even relatively small changes to the building's configuration can have a noticeable effect on the overall project cost. Some of the biggest factors include:

Sidewall Height

Sidewall height affects the amount of steel and wall material required while also determining how much usable vertical space you have inside the building.

A 14-foot building may be suitable for general equipment storage and vehicle parking, while a 16- or 18-foot building provides more clearance for lifts, taller equipment, pallet racking, and other commercial applications.

Commercial Doors

Large commercial buildings often require larger and more numerous doors than residential garages. The number, size, and placement of these doors can affect the framing and overall price of the building.

Snow and Wind Loads

Local weather conditions are another important pricing factor. Your building will need to be engineered according to the requirements for its location, which can influence framing and paneling costs.

Foundation

Engineered Metal Buildings offers concrete services, but the cost is not factored into the main price of your 60x100 structure. You’ll want to budget for your concrete slab separately.

Permits and Building Codes for Commercial Steel Buildings

A 60x100 steel building is a substantial commercial structure, so permitting and code compliance should be addressed early in the planning process. Local requirements vary, but commercial projects commonly involve more documentation and review than smaller accessory structures. Contact the local building department before preparing the site or ordering the building.

Common considerations include:

• Building permits: Most permanent 60x100 commercial buildings will require a building permit.
• Site plans: The county or municipality may require a site plan showing property lines, setbacks, access, drainage, and the proposed building location.
• Engineered drawings: Site-specific structural plans may be required depending on local codes and design loads.
• Wind and snow loads: The building must be designed for the applicable environmental loads at the project location.
• Foundation requirements: Local requirements may specify foundation dimensions, reinforcement, anchoring, and other details.
• Occupancy requirements: A commercial warehouse or workshop may have requirements based on how employees, customers, equipment, or inventory will occupy the space.
• Electrical and plumbing: Separate permits may be required for electrical, plumbing, HVAC, or other building systems.
• Inspections: Construction may require inspections at various stages before the building can be occupied.

Why Choose Engineered Metal Buildings for a Large Steel Building?

Engineered Metal Buildings is proud to offer a wide selection of commercial steel buildings designed for warehouses, workshops, equipment storage, fleet facilities, agricultural applications, and other large-scale projects. Our structures are made with durable steel framing and engineered to hold up to the wind and snow in your area.

When you work with us, you get:

• Durable steel construction
• Engineered buildings designed for your location
• Delivery and installation
• Concrete services
• Customizable sizes, heights, doors, and configurations
• Commercial and clear-span building options
• Flexible financing and rent-to-own plans
• Dedicated customer support

From the initial design to installation, EMB can help you plan a large steel building that provides the space and functionality your operation needs. Call Engineered Metal Buildings today at (208) 572-1441 for a FREE quote on your 60x100 steel building.

Ready to plan your 6,000-square-foot steel building? Design Your Building Online to explore sizes, doors, and colors, or call (208) 572-1441 for a location-specific commercial quote.

Conclusion

A 60x100 steel building provides 6,000 square feet of open, customizable space for warehouses, workshops, equipment storage, fleet parking, and commercial operations. In 2026, EMB's listed 60x100 models range from approximately $108,700 to $119,500, while a concrete slab can add another $36,000–$72,000 depending on local conditions and construction requirements. Choosing the right height, doors, structural specifications, and interior layout can help you get the most value from a large steel building.

Ready to plan your warehouse or workshop? Call Engineered Metal Buildings at (208) 572-1441 for a FREE quote or explore your options at EngineeredMetalBuildings.com.