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30x40 Premium Metal Building | 30x40 Steel Garages for Sale
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Metal Workshops

30x40 Premium Metal Building

SKU: GB1585

30' W × 40' L × 12' H
Vertical Roof
1200 sq ft
Financing Available
No Credit Check RTO

Starting at

$20,328*

Delivered & installed — final price varies by location.

*Accessories shown are not included in the base price

30' × 40' × 12'

1,200 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 30x40 premium metal building gives you 1,200 sq. ft. of enclosed steel space for vehicles, tools, equipment, farm supplies, ATVs, mowers, trailers, or a working shop setup.

The 30-foot width gives you room for parking, storage, and equipment access. The 40-foot length gives you enough depth for workbenches, shelves, tool chests, or a small shop layout without crowding the floor.

The attached 12-foot lean-to adds covered side space for outdoor equipment, firewood, trailers, farm supplies, or anything you want under roof but outside the main enclosed area.

This building has a 12-foot height, vertical roof system, 2 10x10 roll-up garage doors, 1 side roll-up door, and 1 walk-in door. The vertical roof helps rain, snow, leaves, and debris move off the building better. The side roll-up door is useful when you need quick access to mowers, tools, ATVs, or shop equipment without opening the main doors.

Built with a 14-gauge steel frame and 29-gauge metal panels, this building is made for homeowners, landowners, farmers, and small business owners who need secure storage with room to work.

Every building is custom made. You can change the size, height, colors, lean-to layout, garage doors, walk-in doors, windows, insulation, anchors, panel layout, and certified wind or snow options based on your property and local code needs.

Delivery and professional installation are included. Call Garage Buildings to get your 30x40 metal building quote.

Technical Details

Specifications

SKUGB1585
Frame Gauge14-Gauge (12-Gauge upgrade available)
Panel Gauge29-Gauge
MaterialGalvanized Steel
Area1200 SQFT
KitsNo
BrandGarage Buildings
Gauge14 GA (2½”)
Width30'
Height12'
Length40'
Lean-to1
WainscotGray
Door ColorHigh Gloss White
Roof ColorGray
Roof Pitch3/12
Roof StyleVertical
Trim ColorGray
Wall ColorLight Stone
Garage Door3
Roof Length41'
Wall Panels29-Gauge Metal Panels
Lean-to Size12′ Lean-To
Walk-in Door1
CertificationBuilt to Local Code
Frame MaterialGalvanized Steel
Included PartsSteel frame, panels, trim, anchors, hardware
Structure TypeA-Frame
Panel Warranty 10-Year Paneling Warranty
2d Floor PlannerYes
Gaarge Door Size(2) 10’x10′ Roll-Up Garage Doors
Structure DesignMain Garage + Side Covered Extension
Vehicle Capacity2–4 Vehicles + Equipment
Design HighlightsSpacious garage layout, extended lean-to coverage, modern two-tone finish
Weather ResistanceRust resistant, wind resistant, rain resistant, UV resistant
American Made SteelYes
Installation SurfaceConcrete
Customization OptionsExtra doors, windows, insulation, colors, certification upgrades
Wall Panel OrientationVertical

Can't Find the Right Fit? Design Your 30x40 Premium Metal Building in 3D

Customize your 30x40 Premium Metal Building 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.

Design in 3D

Flexible Payments

Affordable Payment Options

Traditional Financing

Low monthly payments with competitive rates through our financing partners. No early payoff penalties. Get approved in minutes.

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Rent-to-Own — No Credit Check

Bad credit? No credit? No problem. Get your building now and pay monthly. Our trusted RTO partners — EZPay Buildings (exclusive 48-month terms for renters), RTO National, and Heartland (up to 60 months) — offer no-credit-check, same-day approval for amounts up to $20,000.

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Ready to Make the 30x40 Premium Metal Building Yours?

Get a personalized quote with your exact customizations — color, doors, windows, and more. It's free, fast, and there's zero obligation.

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Got Questions? We've Got Answers

What is the benefit of the 12′ lean-to?
The lean-to provides additional covered space for parking, equipment storage, or outdoor work areas without increasing the main building footprint.
Is this building suitable for commercial use?
Yes, this structure is ideal for small businesses, workshops, storage units, or agricultural operations.
Do I need a concrete foundation?
A concrete slab is highly recommended for maximum stability and longevity, though other installation options may be available.
Can I customize doors and layout?
Absolutely. You can add more doors, windows, insulation, or adjust the layout based on your needs.
Is the building certified for weather conditions?
Yes, it can be engineered to meet local wind and snow load requirements depending on your location.
How long does installation take?
Most installations are completed within 1–2 days after site preparation.
What can a 30x40 premium metal building be used for?
A 30x40 metal building works well for vehicle storage, equipment storage, farm supplies, lawn equipment, ATVs, trailers, tools, small business storage, or a workshop.
How much space does this 30x40 building provide?
The main building gives you 1,200 sq. ft. of enclosed steel space. The attached 12-foot lean-to adds extra covered side space for outdoor storage or equipment coverage.
What is the benefit of the attached lean-to?
The lean-to gives you covered space outside the main enclosed building. It works well for trailers, mowers, firewood, tools, farm supplies, side parking, or quick-access equipment.
What doors come with this building?
This building includes 2 10x10 roll-up garage doors, 1 side roll-up door, and 1 walk-in door. That gives you access from more than one side of the building.
Why is the side roll-up door useful?
The side roll-up door helps when you need to move mowers, ATVs, tools, or shop equipment in and out without opening the main garage doors.
Why choose a vertical roof system?
A vertical roof helps rain, snow, leaves, and debris slide off more easily. It’s a strong choice for a 30x40 building used for storage, workshop space, or farm equipment.
What steel does this building use?
This building uses a 14-gauge steel frame and 29-gauge metal panels. These are common choices for durable metal buildings with low upkeep.
How much does a 30x40 metal building cost?
A 30x40 metal building can cost anywhere from the low five figures to much higher once you add doors, windows, insulation, certification, anchors, colors, and interior options. The final price depends on your ZIP code, roof style, height, steel gauge, door layout, installation surface, and local wind or snow requirements. For an accurate installed price, it’s best to price the exact 30x40 layout you want.
How much does a 30x40 concrete slab cost?
A 30x40 concrete slab is 1,200 sq. ft., and the cost depends on slab thickness, site grading, base prep, concrete strength, rebar or wire mesh, labor, and local concrete rates. A basic 4-inch slab usually costs less than a thicker reinforced slab made for heavier trucks, tractors, lifts, or commercial use. Always confirm slab specs with your local contractor before ordering the building.
Is it cheaper to build a metal building or wood?
A metal building is usually cheaper to maintain over time than a wood building. Steel doesn’t rot, warp, attract termites, or need the same level of painting and upkeep. Wood can make sense for certain residential styles, but for garages, carports, workshops, farm storage, and equipment buildings, metal is often the better long-term value.

Essential Resources

Before You Buy

Everything you need to make a confident decision on your metal building purchase.

Buyer's Guide

Financing & RTO

Customization

Areas We Serve

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Not sure about sizing, roof style, or options? Our team has 29+ years of experience and will help you find exactly what you need.

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