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20x30 Metal Garage

SKU: GB1681

20' W × 30' L × 10' H
Vertical Roof
600 sq ft
Financing Available
No Credit Check RTO

Starting at

$12,824*

Delivered & installed — final price varies by location.

*Accessories shown are not included in the base price

20' × 30' × 10'

600 sq ft · Vertical Roof

Free delivery & professional installation
20-year rust-through warranty
No credit check RTO available
18+ color options available
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Delivery, certifications & load requirements

This 20x30 garage kit gives you 600 sq. ft. of enclosed steel space, plus a 10x30 left lean-to for another 300 sq. ft. of covered side storage.

The main garage works well for a vehicle, truck, tools, mower, ATVs, motorcycles, farm supplies, or a small workshop. The lean-to gives you quick covered space for firewood, trailers, outdoor tools, equipment, or anything you want under roof without using up the main garage floor.

This building has a 12-foot height, vertical roof, 3:12 roof pitch, and an estimated 14 ft 6 in. peak height. It is also 150 MPH wind and 35 PSF snow certified, which makes it a strong choice for buyers who need a code-ready garage with better weather ratings.

The layout includes a 12x12 garage door, 36x80 walk-in door on the left wall, 2 30x30 windows on the left wall, and black wainscot for a cleaner finished look. Every building is custom made, so you can adjust the size, height, doors, windows, lean-to layout, colors, insulation, anchors, and certified options based on your property and local code needs.

Delivery and professional installation are included. Call Garage Buildings to get your 20x30 garage kit quote.

Technical Details

Specifications

SKUGB1681
Roof StyleVertical
Area600 SQFT
BrandGarage Buildings
Width20'
Height12'
Length30'
Lean-to1
Windows1
Best useVehicle storage, tool storage, workshop, farm utility storage, trailer cover, mower storage, ATV storage
MaterialGalvanized Steel
WainscotBlack
Warranty20-Year Rust-Through
Delivery FREE Delivery to Your Building Site
DurabilityBraces & Anchors on Every Leg For Longer stability
Roof Pitch3/12′ Roof Pitch
Roof colorBlack
Trim ColorBlack
Wall ColorWhite
Frame Gauge14-Gauge (12-Gauge upgrade available)
Garage Door1
Panel Gauge29-Gauge
Peka Height14.5'
Roof Length31'
Window Size(2) 30×30 inch Windows on the Left Wall
Lean-to SizeLeft Lean-to 10×30′ (Center)
Service AreaNationwide
Walk-in Door1
CertificationBuilt to Local Code
Installation FREE Installation on Your Pad
Small workshopThe 600 sq. ft. main space gives room for a workbench, tool chest, compressor, and project area.
Vehicle storageGood for 1 vehicle with extra room for tools, shelves, and equipment.
2D Floor PlannerYes
Garage Door Size12×12 ft Garage Door
Lean-to coverageThe 10x30 lean-to works well for firewood, trailers, equipment, outdoor supplies, or quick-access storage.
Walk-in Door Size36×80 inch Walk-in Door on Left Wall
Installation SurfaceConcrete
Truck or equipment accessThe 12x12 garage door gives better clearance than a standard 8x8 or 9x8 door.
Farm and landowner storageUseful for mowers, ATVs, small tractors, feed, tools, and repair gear.

Can't Find the Right Fit? Design Your 20x30 Metal Garage in 3D

Customize your 20x30 Metal Garage with different roof styles, colors, dimensions, garage doors, walk-in doors, windows, insulation, lean-tos, certification options, and other available upgrades.

Our free 3D Building Designer lets you personalize every detail, compare different layouts, and visualize your building before requesting a quote—helping you design the perfect structure for your property and needs.

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Got Questions? We've Got Answers

How much does it cost to build a 20x30 garage?
A 20x30 garage gives you 600 sq. ft. of enclosed space. Cost depends on roof style, height, garage doors, walk-in doors, windows, lean-tos, insulation, anchors, steel gauge, slab, and local wind or snow certification. This 20x30 garage kit has a 12-ft height, vertical roof, 12x12 garage door, lean-to, windows, and 150 MPH + 35 PSF certification, so it should be priced as a stronger custom garage, not a bare basic shell.
What does a 20x30 metal building cost?
A 20x30 metal building can start lower as an open carport-style structure and cost more as a fully enclosed garage. Public 2026 guides commonly show broad ranges because doors, framing, installation, slab, and certified engineering change the final number fast. For this Garage Buildings model, the certified rating, 12-ft height, vertical roof, lean-to, 12x12 door, walk-in door, windows, and wainscot all affect pricing.
Is a 20x30 garage big enough for 2 cars?
A 20x30 garage can fit 2 smaller vehicles, depending on door placement and how much room you want between them. For daily use, I’d call it better as 1 vehicle plus storage or 1 vehicle plus a workshop area. If you drive trucks or SUVs, a wider garage usually feels better.
How many square feet is a 20x30 metal garage?
A 20x30 metal garage has 600 sq. ft. of floor space. That’s enough for vehicle storage, tools, lawn equipment, ATVs, motorcycles, shelves, or a small workbench area.
Is it cheaper to build a metal garage or a wooden garage?
A metal garage is usually the better long-term value for storage, vehicles, farm equipment, and workshops. Steel doesn’t rot, warp, or attract termites like wood can. Wood can match certain home styles, but it usually takes more upkeep over the years. Current comparison guides also show prefab metal garages often price lower than comparable wood garages.
Do I need a concrete slab for a 20x30 metal garage?
A concrete slab is the best surface for an enclosed garage, especially if you’re parking vehicles, storing tools, or using the space as a workshop. Some metal buildings can go on gravel or other prepared surfaces, but enclosed garages usually perform better on concrete. Local code may also decide what surface is required.
What size garage door is best for a 20x30 garage?
For this 20x30 garage kit, the 12x12 roll-up garage door is a strong choice because it gives better clearance than a smaller 8x8 or 9x8 door. That helps with taller trucks, tractors, trailers, equipment, and shop access.
Do I need a permit for a 20x30 garage?
Maybe. Permit rules depend on your city, county, foundation, building size, wind rating, snow load, anchoring, and use. A 20x30 enclosed garage often needs a permit in many areas. Since this model is certified for 150 MPH wind and 35 PSF snow load, it’s a good fit for buyers who need engineered specs for local code.

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