Three Car Garages

Way bigger than you think.

A 24×30 barely fits three cars, with maybe 2 feet behind them. Want room for a workbench? Riding mower? Tools? You need 30×40 steel garages at a minimum.

I tell customers all the time—if you’re even thinking about workspace, go bigger. I’ve had customers insist on 24×36 to save money, and six months later, they’re asking me to add on because they can’t fit all their tools. It’s just going to cost you more later.

30×40 or 36×40 is ideal if you want real workshop space. It costs more upfront but beats building a second building later.

Right now, a basic 24×30 steel garage runs between $13,000–17,000 installed. That includes one 16×8 overhead door, one walk door, and basic colors.

Want upgrades? Insulation adds $2,000–2,500. Extra doors, windows, or custom colors? It all adds up quickly.

For a 30×40 steel garage with upgrades, expect to pay $20,000–28,000. Material costs are still rising, so these numbers may change in the next few months.

Don’t forget about concrete if you need it—that’s an additional $3,000–5,000 for a 20×20 pad.

Concrete runs about $4–5 per square foot installed. A 24×30 slab will cost around $3,000–3,600. A 30×40 slab will be closer to $4,800–6,000.

This is assuming decent soil conditions and not much site prep needed. If you’ve got clay soil or big slopes, it’s going to cost more.

Some customers try to save money with gravel, but they regret it later. Gravel leads to oil stains, uneven spots, and dust everywhere. Concrete is always the better option if you can afford it.

Pretty much anything that makes sense structurally.

Want two separate 8×8 doors instead of one big one? No problem. Windows on the back wall for light? Easy. Roll-up door on one end and a regular overhead door on the other? We’ve done it before.

We offer different roof styles—regular gable, gambrel (for more headroom), or lean-to if you’re adding onto something. We can even adjust the roof pitch, but I won’t go under 3:12 because of drainage issues.

What doesn’t work is trying to make it look fancy like a stick-built garage. It’s metal construction—it’s going to look like what it is.

Not required, but probably should. Here’s why:

Gravel works for parking, but you’ll have dust, moisture problems, and uneven spots where jacks won’t sit right. Plus, if you ever want electrical service, the inspector’s going to want that slab anyway.

Concrete costs about $4–5 per square foot installed. Yeah, it’s $1,500–2,000 more upfront, but it makes everything else easier. It’s easier to clean oil spills, better for tools and workbenches, and keeps moisture down.

Clay soil or poor drainage? Definitely need concrete, or you’ll have standing water issues.

It depends on your location.

Around here, 4:12 is standard—good drainage, not too expensive to frame. If you’re in mountain areas with heavy snow loads, you might need 5:12 or 6:12.

Flatter roofs like 3:12 work in dry areas, but I’ve seen problems with debris buildup and standing water. I won’t warranty anything under 3:12.

Steeper roofs cost more—more framing, more steel panels—but they last longer and shed everything better.

Lead times are running 5–7 weeks right now from order to delivery. Steel supply chain’s still a mess.

Installation is usually 2–3 days once we get there. Bigger garages take longer—30×40 might take 3–4 days, depending on site conditions and how many doors you have.

Weather can delay things. We can’t set trusses in high winds or work when it’s snowing or icing.

We have several options. Rent-to-own programs that don’t require perfect credit—usually 48–60 months. You’ll pay more in total, but you get the building now.

We also work with a couple local credit unions for traditional financing if your credit’s decent. Better rates than RTO, but they’re pickier about approval.

Cash is always cheaper, but not everyone has $20,000+ sitting around. Most people finance it somehow.

10. Will my three-car garage withstand heavy winds and snow?

Built right? Absolutely. I engineer every building for local codes—usually 90 mph winds, 25–30 psf snow loads, depending on your exact location.

Proper foundation anchoring and framing spacing are key. We use the right anchor bolts, space everything correctly, and tie it all together with hurricane clips.

The problem comes when people cut corners on installation or try DIY. I’ve seen failures from that, but never from buildings we’ve installed properly.