Metal Building Sizes
From a 30x40 home shop to a 60x100 clear-span warehouse, the right dimensions start with how you plan to use the space. Here is how the common sizes compare, what each one fits, and what actually drives the cost of a building at that size.
Width, length, and eave height
Metal building sizes are written width by length, and often with a third number for eave height. A "40x60x14" is 40 feet wide, 60 feet long, with a 14 foot eave. Width is the dimension that matters most, because it sets the clear span, the distance the roof framing crosses with no interior columns. Wider buildings need heavier framing, so width is the larger cost driver. Length is the cheaper dimension to extend, which is why many owners fix the width to their use and then adjust the length to fit the site and the budget.
Common sizes compared
Floor area is fixed by the dimensions. Eave heights below are typical ranges, not limits, every building is engineered to your use and your site.
| Size | Floor area | Typical eave height | Common uses |
|---|---|---|---|
| 30x40 | 1,200 sq ft | 1014 ft | Home shop, two to three bay garage |
| 30x60 | 1,800 sq ft | 1214 ft | Workshop, contractor storage |
| 40x40 | 1,600 sq ft | 1214 ft | Garage and shop, small commercial |
| 40x60 | 2,400 sq ft | 1216 ft | Multi-bay shop, light commercial, agricultural |
| 40x80 | 3,200 sq ft | 1416 ft | Flex warehouse, equipment storage |
| 50x80 | 4,000 sq ft | 1418 ft | Commercial, fabrication, large agricultural |
| 50x100 | 5,000 sq ft | 1620 ft | Warehouse, riding arena, manufacturing |
| 60x100 | 6,000 sq ft | 1624 ft | Distribution, large arena, hangar |
| 100x100 | 10,000 sq ft | 1824 ft | Industrial, large commercial |
What each size is for
Small (up to 1,800 sq ft)
Sizes like 30x40, 40x40, and 30x60. The home shop, multi-bay garage, and small contractor footprint. Single span, modest eave height, the most economical cost per square foot.
Medium (2,000 to 4,000 sq ft)
Sizes like 40x60, 40x80, and 50x80. The workhorse range for shops, light commercial, agricultural, and barndominiums, where clear span and bay layout start to matter.
Large (5,000 sq ft and up)
Sizes like 50x100, 60x100, and 100x100. Warehouse, manufacturing, distribution, riding arenas, and hangars, where wide clear span and tall eave heights drive the design.
What drives the price at a given size
We engineer and erect to your site, so there is no flat per-size price. The dimensions set the starting point, and these factors move the final number. A quote is the only way to get a real figure for your project.
Width & Clear Span
The single biggest lever. A wider building means heavier frames to cross the span without interior columns, which raises the cost per square foot.
Eave Height
Taller walls add steel and panel area. The right height depends on what goes inside, from a single overhead door to clearance for equipment or a mezzanine.
Snow & Wind Loads
Your site is engineered to local code. A building in the high country carries far more snow load than the same footprint on the plains, and the frame is sized to match.
Foundation & Site
Soil conditions, slope, and access shape the foundation and the work to prepare the pad. Site prep is often underestimated in early budgets.
Insulation & Finishes
Insulation package, wainscot, colored roof, gutters, and interior finish all add to a bare shell. They also change how the building performs and looks.
Openings & Accessories
Overhead and walk doors, windows, lean-tos, and porches. The number and size of openings affect framing and the final quote.
Sizing FAQs
How are metal building sizes measured?
Width by length, sometimes with eave height as a third number. A 40x60x14 is 40 feet wide, 60 feet long, with a 14 foot eave. Width is listed first and matters most, because it sets the clear span.
What is the most popular size?
The 40x60 is the most requested size across the industry. At 2,400 square feet it suits a multi-bay shop, light commercial use, or an agricultural building, with room to add overhead doors and still park and store.
How much does a 40x60 metal building cost?
There is no flat price. As an erector we build to your site, so the cost depends on your local snow and wind loads, the foundation and site prep, the eave height, the insulation and finishes, and the openings you need. Send us your location and use and we will quote it.
Can I get a custom size?
Yes. Pre-engineered buildings are built to dimension, usually in five or ten foot increments, so you are not limited to the standard sizes above. We size the building to your use rather than fitting your use into a stock size.
Is it cheaper to go wider or longer?
Longer. Width drives the clear span and the frame weight, so adding length is generally the more economical way to gain floor area. Many owners set the width to their use, then extend the length to the budget.
Not sure which size you need?
Tell us how you plan to use the building and we will help you size it right, then quote it for your site.