SC77
Straight Roof Barns · Regular roof
36′x25′x12′ Straight Roof Barn
Sq ft
900
Bays
3
Eave
12′
PopularSmall contractor's shop with framed-opening front
AlsoGreat for a shop classroom.
From $223/mo · 7 yr · 6.9% APR
Color
Optional — pick one or choose at quote- Free delivery & professional installation
- Anchors for concrete, asphalt, or ground
- 12- or 14-gauge galvanized steel
- Certifiable to your county's wind & snow loads
- 20-year rust warranty on the frame
- Financing & no-credit-check Rent-to-Own
SKU: SC98
40′x21′x12′ Steel Barn
Starting at
$13,470
Financed
$182/mo
Starting price — final cost varies by state, options, and any wind/snow certification.
Price-beat guarantee. Bring us a written quote for a comparable American-made building from any competitor — same gauge, same engineering, same install — and we'll beat it.
At a glance
The build, by the numbers.
40′x21′x12′ A-Frame Straight Roof Barn includes gabled center ends and fully enclosed lean-tos, along with two 9′x8′ doors, a walk-in door, and a 30" window.
A 40′ span is wide enough to leave a working aisle down the middle with room to park either side of it. The most common thing we quote a 40′x21′x12′ for is self-storage style locked dry storage. Second most common: a loading bay.
Most popular for self-storage style locked dry storage
Building size
- 40′Wide
- 21′Long
- 12′High
Total coverage840 sq ft
Building details
- Frame gauge
- 14-gauge galvanized steel
- Panel gauge
- 29-gauge steel
- Building type
- Horizontal Straight Roof Barn
- Gable ends
- (2) Gable Ends
- Roll-up doors
- (2) 9′x8′ Roll Up Doors
- Walk-in doors
- (1) Walk-In Door
- Windows
- (1) 30"x36" Window
- Workmanship warranty
- 30 days
- Rust-through warranty
- 20 years
- Delivery & installation
- Included
What's it for
Same shell, very different jobs.
A 40′x21′ gets specified differently depending on what goes in it — door placement, openings, leg height, whether it closes in. Tell us the job and we'll spec it to that instead of handing you a blank form.
Delivery & installation
What happens after you order.
01
Lock your price
We confirm your exact number for your ZIP and options, in writing — with our price-beat guarantee behind it.
02
Prep your site
Pick a level spot — concrete, asphalt, or ground. Anchors for all three are included.
03
We deliver & install
It arrives and goes up on your site, included in the price across 40 states. Nothing for you to assemble.
04
Backed for decades
Your steel frame carries a 20-year rust warranty from day one.
Similar products
Close to this size.
SC181
Straight Roof Barns · Regular roof
30′x24′ Straight Roof Steel Barn
Sq ft
720
Bays
3
Eave
11′
PopularPallet warehouse with rack-ready clear span
AlsoGreat for rental units.
From $189/mo · 7 yr · 6.9% APR
Questions
Good to know.
A specialist can walk you through this exact build over the phone in a few minutes.
No concrete required. A 40′ x 21′ x 12′ cover anchors to concrete, asphalt or compacted ground, and the right anchors for whichever you have are included. What matters is that the 40′ x 21′ area is level and clear when the crew arrives.
It is the leg height, not the tallest point. 12′ runs from the base rail to the eave, where the roof meets the 21′ sidewall; the ridge is higher again because of the roof pitch. For anything driving into a 40′ x 21′ x 12′, the door opening is the real limit anyway.
This one is specified with (2) 9′x8′ roll up doors. That is the opening itself, so measure whatever has to drive through against the door rather than against the 40′ width. Door sizes are not fixed — if what you are parking is tight, say so on the quote, because adding or resizing an opening up front is cheaper and cleaner than cutting one in later.
$13,470 covers the building, the delivery and the install crew. It does not cover site work — leveling the 40′ x 21′ area, or pouring a slab if this one is going on concrete. Those happen before install day. Options and local wind and snow certification are the two things that move the number.
The 20 years figure is rust-through on the frame, which is the structural cover and the one that matters over the life of a 40′ x 21′ building. Separately, the install itself is warranted 30 days, so anything that looks wrong when the crew leaves should be raised inside that window.
The 40′ x 21′ x 12′ shown here is one point on a range, not a fixed product. Width adjusts in 2-foot increments, length in 5-foot increments, leg height by the foot — so if you need a few more feet of 21′, that is a re-price rather than a different building.
Frame gauge is structure, panel gauge is skin. On this 40′ x 21′ the frame is 14-gauge galvanized steel and the panels are 29-gauge steel. Because the scale runs backwards, the smaller number is the thicker steel — which is why the frame figure is the one worth checking when two quotes look the same.
Reviews
Owners say it best.
Real, verified Google reviews from owners who bought their building from us, straight from our business profile.
View all reviewsWe are building a barndominium and they delivered the shell on schedule. Our contractor said the framing was straighter than most stick-built shells he sees.
P
Priya & Dave L.
Bend, OR
Loafing shed for the horses showed up exactly when they said it would. The crew leveled and anchored on uneven ground and didn't try to charge extra.
G
Greg H.
Bowling Green, KY
Hurricane-rated anchors and engineer-stamped drawings were ready when our county asked. Permit went through the first time.
T
Tonya W.
Lakeland, FL