SC142
Garages · Regular roof
18′x26′x8′ Steel Garage
Sq ft
468
Bays
1
Eave
8′
PopularTwo-car daily-driver garage with a workbench wall
AlsoGreat for lawn equipment.
From $117/mo · 5 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: SC125
18′x21′x8′ One Car Garage
Starting at
$5,835
Financed
$104/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.
This 18′x21′x8′ A-frame horizontal roof garage features an 8′x7′ roll-up door and a walk-in door. The Pewter Gray horizontal paneling provides a sleek look.
It is close to square, which keeps the floor easy to divide instead of forcing everything into one line. No windows are specified, so daylight is something to raise at quote if you want it. The most common thing we quote an 18′x21′x8′ for is a detached garage paired with a finished hobby room. Second most common: winter trailer storage.
Most popular for detached garage paired with a finished hobby room
Building size
- 18′Wide
- 21′Long
- 8′High
Total coverage378 sq ft
Building details
- Frame gauge
- 14-gauge galvanized steel
- Panel gauge
- 29-gauge steel
- Roll-up doors
- (1) 8′x7′ Roll-up door
- Walk-in doors
- (1) Walk-in door
- Workmanship warranty
- 30 days
- Rust-through warranty
- 20 years
- Delivery & installation
- Included
What's it for
Same shell, very different jobs.
A 18′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.
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Questions
Good to know.
A specialist can walk you through this exact build over the phone in a few minutes.
A level spot is enough. Concrete, asphalt and compacted ground all work, and the matching anchors for all three ship with the building. Mark out the full 18′ x 21′ footprint and check it for level before delivery day — uneven ground is the one thing that reliably slows an install down.
It is the leg height, not the tallest point. 8′ 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 an 18′ x 21′ x 8′, the door opening is the real limit anyway.
This one is specified with (1) 8′x7′ Roll-up door. That is the opening itself, so measure whatever has to drive through against the door rather than against the 18′ 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.
Delivery and professional installation are both in it — the crew sets the 18′ x 21′ x 8′ on your site. What it does not cover is getting that site ready: leveling, and the concrete if you are pouring a pad. That happens before the crew arrives, by you or a local contractor. Treat $5,835 as the starting figure; options and your county's wind and snow certification move it.
Rust-through on the frame runs 20 years. Workmanship on the install runs 30 days. They are deliberately different lengths because they cover different risks — the steel of this 18′ x 21′ x 8′ degrading, versus how it went together on your site.
It is not a fixed size. Starting from this 18′ x 21′, width changes in 2-foot steps and length in 5-foot steps, and the 8′ legs move a foot at a time. Give us the size you need and we quote that one.
Two different parts. The frame is the tubing carrying the load of this 18′ x 21′ x 8′ — 14-gauge galvanized steel. The panels are the skin screwed to it, 29-gauge steel. Lower gauge number means thicker steel, so the frame is always the heavier of the two. Compare frame to frame across quotes; that is the number that decides how a building stands up.
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