20×30 Metal Building
600 sq ft 10 to 14 ft eave
A 20×30 metal building gives you 600 square feet of clear-span, column-free space, a popular footprint for a two-car garage, a workshop, or general storage that needs room to move around equipment. Universal Steel of America is a US manufacturer of pre-engineered steel buildings: we engineer every frame to your local snow, wind, and seismic code and ship it across the US and internationally.
This is a true engineered red-iron building, not a light-gauge carport and not a weld-it-yourself kit. We deliver from the plant closest to your site across the US and, internationally, the Caribbean, Puerto Rico, South America and Africa, and professional erection is available as an optional service if you would rather not raise the steel yourself.
- Dimensions
- 20 ft wide x 30 ft long
- Floor area
- 600 sq ft
- Clear span
- 20 ft column-free
- Typical eave height
- 10 to 14 ft
- Frame
- engineered red-iron (PEMB) primary steel
- Panels
- 26-gauge steel roof and wall sheeting
- Loads
- engineered to local snow, wind, and seismic code
- Finish warranty
- 25 to 40 year on paint and coating
- Delivery
- shipped from the closest plant to your site
- Erection
- optional professional service
Popular uses for a 20×30 Metal Building
Two-car and multi-bay garage
The 20 ft clear width parks two vehicles side by side with no center post in the way. A 10 to 12 ft eave handles standard cars and trucks, while 13 to 14 ft suits taller vehicles or a future lift. Wide roll-up doors are engineered into the frame so the full opening stays usable.
Metal garagesWorkshop or trade shop
600 square feet is enough for a vehicle plus a real work zone with benches, shelving, and clearance to move. The column-free span keeps the floor plan flexible for a hobby shop or a contractor and trade business. Add windows and walk doors where you need light and access.
Shop buildingsRV and boat storage
With a taller eave, a 20x30 stores an RV, a boat, or a tall trailer under a fully enclosed, weather-tight roof. The 30 ft length covers most travel trailers and mid-size motorhomes with room to walk around. Specify the door height up front so the opening clears your rig.
RV and boat storage buildingsEquipment and farm storage
For a small farm or property, this size shelters tractors, ATVs, implements, hay, and tools out of the weather. The clear span lets you drive equipment straight in and park it without interior obstructions. Loads are engineered to your local snow and wind code.
Agricultural steel buildingsSmall commercial or retail
A 20x30 works as a compact retail storefront, a small office, or a service bay for a growing business. Steel goes up fast and the open interior is easy to fit out with a counter, storage, or partitions. We engineer the frame and openings to suit your layout and local code.
Commercial steel buildingsWhat fits in 600 square feet
At 20 feet wide and 30 feet deep, a 20×30 comfortably parks two vehicles side by side, or one vehicle plus a dedicated work zone with a bench, shelving, and floor space for tools. The 20 ft clear span means no interior posts to work around, so the full width is usable. With a taller eave you gain headroom for a lift, tall shelving, or an RV and boat under cover.
From workshop to small commercial
The same footprint works as a backyard workshop, a contractor or trade shop, a retail storefront or small office, or light agricultural and equipment storage. Wall height is the main lever: 10 to 12 ft suits a standard garage or shop, while 13 to 14 ft opens the door to taller vehicles, mezzanine ideas, and bigger roll-up doors. Every opening, from walk doors to oversized roll-ups, is engineered into the frame before fabrication.
Built to code, delivered ready to assemble
We size your primary frame, purlins, and bracing to the loads at your address, then mark and pre-punch every member so the parts fit together on site. Panels carry a 25 to 40 year finish warranty on the paint and coating. You can pour the slab and arrange erection locally, or add our professional erection service and concrete coordination to the order.
20×30 Metal Building questions
How much does it cost to build a 20x30 metal building?
Industry-typical pricing for a 20x30 puts the engineered shell around $8,000 to $15,000, with a finished, turnkey project on a slab commonly $15,000 to $25,000 or more. The biggest variables are eave height, snow and wind loads, openings, insulation, and how much concrete and site work the job needs. These are general estimates, so request a quote for your exact spec and location.
Is it cheaper to build a steel building or a wood pole barn?
Up front a wood pole barn can look cheaper, but an engineered steel building usually wins on total cost of ownership. Steel resists rot, pests, fire, and warping, needs less maintenance, and carries a long finish warranty on the panels. For a 600 sq ft building meant to last decades, pre-engineered steel is typically the better long-term value.
How much does a 20x20 metal building cost compared to a 20x30?
A 20x20 is 400 square feet versus 600 for a 20x30, so the smaller building costs less in raw materials but more per square foot. Because framing, doors, and delivery do not scale down one for one, stepping up to a 20x30 often adds only a modest amount for 50 percent more usable space. If you are weighing the two, the 20x30 is usually the better value for a two-car garage or workshop.
What is the typical wall height for a 20x30 metal building?
Most 20x30 buildings use an eave height of 10 to 14 ft. A 10 to 12 ft wall suits a standard garage or workshop, while 13 to 14 ft gives the headroom for taller vehicles, an RV, a vehicle lift, or oversized roll-up doors. We engineer the frame to whatever eave height your use and local code call for.
Does a 20x30 metal building need a concrete foundation?
For a permanent, enclosed building a concrete slab is the standard and usually code-required foundation. A 600 sq ft slab typically runs about $4 to $8 per square foot depending on thickness and local rates. You can arrange the slab locally, and we engineer the anchor layout so the building ties down correctly to the foundation.
Get your 20x30 estimate
We engineer and ship from the closest plant, across the US and internationally. Tell us your site and use.