Buying a Used Steel Building Kit and What to Check First

A used steel building kit listed at half the new price looks like the easiest money you will ever save, right up until the frames arrive with a bent rafter, half the bolts missing and no drawings to tell you which column goes where. Most of the buyers who call me after a bad used purchase did not overpay for steel. They paid for a pile of parts that could not be engineered, permitted or assembled without spending the savings twice over.

I price new and used buildings for a living, and a used steel building kit can be a genuinely good deal. It just has to pass a specific set of checks before any money changes hands. This guide walks through those checks in the order I run them, with the numbers that tell you when to walk away.

Why a used steel building kit is cheaper in the first place

Used kits come from three places. The first is the never-erected kit: someone ordered a building, lost the land deal or the permit, and the crate sat in a field. The second is a dismantled building, taken down to clear a site. The third is the cancelled order a dealer resells after a buyer walked away from their deposit.

A never-erected kit stored under cover is often close to new. One that sat uncovered for three winters can have rust under every bundle strap. A dismantled building brings worn holes, stretched bolts and panels with old screw holes.

Typical asking prices I see run from 40 to 65 percent of current new cost. A 40x60 rigid frame kit that would cost about $38,000 new today might be listed between $15,000 and $25,000 used.

The paperwork check that comes before anything else

Ask for the original drawings and the engineering letter before you drive out to look at anything. Without them, a used steel building kit is just steel. Your county will want stamped drawings that match your site's snow load and wind speed, and the original manufacturer is usually the only practical source for those.

Here is what to request from the seller:

• The original order confirmation with the manufacturer's name and job number
• Anchor bolt plans and erection drawings, ideally the full set
• The design loads the building was engineered for: ground snow load, wind speed and exposure category
• The bill of materials or packing list, so you can count parts against it

If the building was designed for 20 psf snow in Texas and you live where the ground snow load is 50 psf, the frames are probably undersized for you. Call the manufacturer with the job number and ask whether they will re-certify the design for your location. Some will do it for $500 to $1,500. Some will refuse outright, and you need to know which before you buy.

If you are unsure what a complete kit should contain, compare the seller's list against our breakdown of what comes in a metal building kit and what does not.

Inspecting the steel on site

Bring a tape measure, a 6 foot level, a flashlight, a phone camera and a printed copy of the packing list. Plan on two hours for a 40x60 kit.

Primary frames

Sight down each rafter and column from one end. Any visible sweep or twist is a problem. A frame member that is out of straight by more than about 1/4 inch over 10 feet should be flagged. Check the end plates where the rafters bolt to the columns. Bent plates, elongated holes or cracked welds mean that piece needs a fabricator's opinion, not your optimism.

Secondary members and panels

Purlins and girts get dropped and stepped on during teardown. Look for crimped flanges and kinks. Panels are the weakest link in most used kits. Count them, check the color matches, and look for scratches through the paint into bare steel. On a dismantled building, expect 10 to 15 percent of the panels to be unusable because of bends and stripped screw holes.

Rust and coatings

Light surface rust on red oxide primed frames is normal and cleans up with a wire wheel and primer. Scaling rust that flakes off in layers, or pitting you can catch a fingernail in, is not. Pay attention to the bottom of each bundle, where water sits longest.

The real cost math, line by line

Here is a worked example for that 40x60 kit listed at $19,000. These are numbers from a project I estimated this year, rounded.

The buyer still saved almost $10,000, which is a good result. But notice the gap went from $19,000 to under $10,000. If the frames had needed new rafters or the manufacturer had refused to re-certify, the savings would have vanished.

A quick rule I use: if hidden extras push the total past 80 percent of the new price, buy new. You get a warranty, a current design and a delivery to your pad instead of your own forklift rental in someone else's mud.

Why I do not trust "just reuse the old bolts"

Plenty of sellers and some forum advice say the original bolts are fine to reuse because they are hardly worn. I disagree, and not out of caution for its own sake. Many frame connections on metal buildings use high-strength bolts tightened with the turn-of-nut method, and those bolts are not meant to be tightened to full tension twice. Once a bolt has been stretched into that range, its threads and shank can be compromised in ways you cannot see.

A full set of frame bolts for a 40x60 runs a few hundred dollars, and old panel screws have worn washers that leak. Buy new hardware, and pour your slab to the anchor bolt drawings, following preparing a site pad before your steel kit arrives.

Moving and storing what you buy

A 40x60 kit fills roughly one and a half flatbed loads. The longest rafter sections can run 25 to 30 feet, so plan for a 48 foot trailer and a forklift or telehandler with at least 6,000 pound capacity at both ends. Label every bundle with spray paint matching the part marks on the drawings before it leaves the seller's yard.

At your site, stack everything on wood dunnage at least 6 inches off the ground, tilted slightly so water runs off. Cover panels loosely with breathable tarps rather than plastic sheeting, which traps condensation and causes white rust on galvanized surfaces within weeks.

Frequently asked questions

Is a used steel building kit worth buying?

It can be, when the drawings exist, the design loads match your location and the steel passes inspection. Expect real savings of 15 to 30 percent after trucking, repairs and new hardware, not the 50 percent the listing suggests. Without drawings, it is rarely worth it.

Can I get a permit for a second-hand metal building?

Yes, if you can submit stamped drawings that meet your local snow and wind loads. The original manufacturer or a licensed engineer usually has to re-certify the design. Our guide to steel building permit cost covers the fees you will face either way.

How much does it cost to take down a steel building to move it?

Dismantling a 40x60 typically takes a crew of three about four to six days, which often lands between $6,000 and $12,000 depending on access and equipment. If the seller expects you to dismantle it, add that figure to the asking price before comparing it with new.