Metal Garages
20x21 Metal Garage
SKU: GB1738
Starting at
$5,508*
Delivered & installed — final price varies by location.
*Accessories shown are not included in the base price
20' × 21' × 8'
420 sq ft · Regular Roof
Check Your Area
Delivery, certifications & load requirements
Need dependable enclosed storage without taking over your property? This 20x21 Metal Garage offers the right balance of compact size, durability, and everyday functionality. With 420 square feet of covered interior space, it is ideal for protecting vehicles, lawn equipment, motorcycles, tools, and seasonal storage items.
This model features a classic regular roof design, making it a cost-effective option for homeowners who want reliable steel protection with a clean traditional look. The included 8'x8' roll-up garage door provides easy front access for parking or moving equipment, while the separate walk-in entry door adds convenient daily access without opening the main bay.
Built with a strong galvanized steel frame and durable metal panels, this garage is engineered for long-term performance against weather, rust, and wear. Whether you need a backyard workshop, mower shed, hobby space, or enclosed storage building, this 20x21 garage delivers flexible value.
Customize your building with upgraded height, vertical roof panels, windows, extra doors, insulation options, and color choices to match your property.
Free delivery and professional installation available in many service areas. Call ☎ our building specialists to customize this building to suit your style. We’ll guide you every step of the way, provide you with a FREE quote, and deliver a structure that puts in the work for you and your most important things.
Technical Details
Specifications
| SKU | GB1738 |
| Area | 420 SQFT |
| Roof Length | 21' |
| Frame Gauge | 14-Gauge (12-Gauge upgrade available) |
| Panel Gauge | 29-Gauge |
| Material | Galvanized Steel |
| Brand | Garage Buildings |
| Style | Fully Enclosed Garage |
| Width | 20' |
| Height | 8' |
| Length | 21' |
| Delivery | Free Delivery on Your Site |
| Openings | (1) 8'x8' Roll-up Door |
| Door Type | (1) Roll-Up Garage Door, (1) Walk-in Entry Door |
| Wall Type | Fully Enclosed Steel Panels |
| Gable Ends | Fully Enclosed |
| Roof Color | Pebble Beige |
| Roof Pitch | Approx. Rounded Regular Style |
| Roof Style | Regular Roof |
| Trim Color | Barn Red |
| Wall Color | Pebble Beige |
| Installation | Free Installation on Your PAd |
| Intended Use | Garage Storage, Lawn Equipment Storage, Workshop, Utility Building |
| Building Type | Metal Garage |
| Coverage Area | 420 SQFT |
| Material Type | Steel |
| Top Use Cases | Car parking, Mower storage, Tool organization, Backyard workshop, Seasonal storage |
| Frame Material | Galvanized Steel |
| Included Parts | Steel frame, roof panels, wall panels, trim, hardware, anchors (varies) |
| 2D Floor Planner | Yes |
| Primary Material | Metal |
| Structure Design | Single Bay Garage with Front Roll-Up Door |
| Vehicle Capacity | 1 Vehicle / Compact Car / Motorcycle / Equipment |
| Design Highlights | Traditional roof style, strong steel frame, clean two-tone exterior |
| Weather Resistance | Rust resistant, Rain resistant, UV resistant, Wind resistant |
| Highlighted Features | Compact footprint, secure enclosed walls, separate walk-in access, affordable garage solution |
| Customization Options | Vertical roof upgrade, windows, extra doors, insulation, color changes, height upgrades |
Can't Find the Right Fit? Design Your 20x21 Metal Garage in 3D
Customize your 20x21 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.
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.
See Financing OptionsRent-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.
Call For Free QuoteReady to Make the 20x21 Metal Garage Yours?
Get a personalized quote with your exact customizations — color, doors, windows, and more. It's free, fast, and there's zero obligation.
Got Questions? We've Got Answers
Is a 20x20 metal garage big enough for a car?
Can I use this garage for lawn equipment and storage?
What is a regular roof garage?
Can I upgrade this garage to a vertical roof?
Does this building come installed?
Can I customize the door sizes and colors?
Essential Resources
Before You Buy
Everything you need to make a confident decision on your metal building purchase.
Talk to a Building Specialist
Not sure about sizing, roof style, or options? Our team has 29+ years of experience and will help you find exactly what you need.