20×20 Metal Building
900 sq ft — triple wide carport for vehicles or equipment
14 Gauge
Local Certification Available
No card charged online · Specialist calls within 1 business day · 10–20% deposit by phone
20×20 Metal Building Specs, Dimensions & Custom Options
At 400 square feet, the 20×20 metal building is a compact square-footprint steel structure ideal for 2-car garages, small workshops, storage buildings, backyard utility space, and equipment shelters. Configure every option below in our free 3D builder, then lock in your build.
| Building Footprint | 20′ Wide × 20′ Longwith leg heights of your choice between 8′ and 12′ |
|---|---|
| Total Square Footage | 400 square feet of usable interior or covered space |
| Building Configurations | 2-car garage, square carport, backyard workshop, storage building, equipment shelter, small farm buildingPopular Size |
| Enclosure Options | Open carport, partially enclosed, fully enclosed garage with four walls, or custom side-panel layouts |
| Roof Styles | Regular Roof (rounded corners, lowest cost), A-Frame Horizontal / Boxed Eave (classic gabled look), or Vertical Roof (best for rain and snow runoff) |
| Roof Pitch Options | Standard 3:12 pitch on every 20×20 build, with 4:12 pitch upgrade available for snow zones or steeper residential styling |
| Frame Gauge | 14-gauge galvanized steel tubing standard. 12-gauge upgrade available for heavier-duty garages, workshops, coastal zones, or high-wind regions |
| Roof & Wall Panels | 29-gauge sheet metal panels standard, 26-gauge upgrade available for hail-prone, coastal, or premium long-life applications |
| Door Options | Roll-up doors from 6’x6′ to 10’x10′, 32″ or 36″ walk-in doors, framed openings, and window kits available |
| Window Options | 24″x24″, 30″x30″, or 36″x36″ insulated glazing options for workshops, hobby spaces, and enclosed garages |
| Color Options | 17 colors for roof, walls, and trim independently: Barn Red, Beige, Black, Brown, Burgundy, Burnished Slate, Clay, Galvalume, Green, Patriot Red, Pewter Gray, Quaker Gray, Rawhide Tan, Royal Blue, Sandstone, Slate Blue, White |
| Wind Rating | 105 to 115 MPH wind ratings standard, with certified upgrades available for coastal, hurricane, and high-wind regions |
| Snow Load | 25 to 35 PSF snow load standard, with certified upgrades available for mountain, Northeast, and Great Lakes snow regions |
| Certification | Engineered, stamped drawings can be added to any 20×20 if your county, HOA, or permit office requires documentation |
| Anchoring | Concrete wedge anchors, asphalt anchors, mobile-home anchors, or auger ground anchors, included with every order |
| Free Delivery | Included on every order in the 48 continental US states |
| Free Installation | Included on every tubular-frame 20×20 build. Concrete pad, gravel, asphalt, or level dirt are all acceptable install surfaces depending on configuration. |
| Lead Time | 4 to 6 weeks from order confirmation. Scheduling may vary by state, season, and manufacturer availability. |
| Installation Time | Most 20×20 structures install in one day, with fully enclosed or heavily customized builds sometimes taking longer |
| Warranty | 20-year rust-through warranty plus 90-day workmanship guarantee |
Limited + Product Pledge
Paint Finish
Workmanship Guarantee
Workmanship Guarantee
10 Practical 20×20 Metal Building Uses (400 Sq Ft Layouts)
A 400 square foot prefab metal building gives you a compact square layout for vehicles, tools, storage, hobbies, small business use, or farm equipment. Pick a use case below to see typical layout and pricing.
20×20 Metal Garage
Square 400 sq ft garage for two compact cars, one full-size vehicle plus storage, motorcycles, tools, and a small workbench. Add a roll-up door, walk-in door, windows, and your preferred color package.
20×20 Backyard Workshop
A 400 sq ft workshop fits a workbench wall, tool storage, mower parking, small woodworking equipment, and weekend project space without taking over the main garage.
20×20 Metal Carport
Open square carport for two vehicles, ATVs, lawn equipment, trailers, or outdoor storage. Start open for the lowest cost and add side panels later if you want enclosed protection.
20×20 Storage Building
Lockable 400 sq ft storage for tools, bins, seasonal décor, business inventory, pool equipment, garden supplies, and household overflow. Add shelving along all four walls.
20×20 Farm Equipment Shelter
Protect small tractors, mowers, ATVs, feed, tack, and farm tools. The square layout works well as a compact barn, hay shelter, or equipment cover near a paddock or driveway.
20×20 Hobby Studio
Use 400 sq ft for crafts, music, fitness, gaming, painting, or a private creative studio. Add insulation, one or two windows, and a walk-in door for year-round comfort.
20×20 Small Business Storage
Store tools, boxed inventory, maintenance equipment, contractor supplies, or jobsite materials in a secure enclosed steel building with roll-up access.
20×20 Home Gym
A 400 sq ft home gym fits a power rack, cardio machine, dumbbell storage, mobility space, and wall-mounted accessories. Add insulation and ventilation for comfort.
20×20 Boat / ATV Storage
Cover a fishing boat, side-by-side, ATVs, motorcycles, bicycles, kayaks, and seasonal outdoor gear. Add a 10’x10′ roll-up door for easy drive-in access.
20×20 Tack Room / Feed Storage
Compact farm storage for saddles, bridles, feed bins, grooming equipment, and small implements. Add ventilation, insulation, and lockable doors for secure daily use.
Not sure which 20×20 metal building configuration suits your project? Our building advisors design it free.
What’s Included in a 20×20 Metal Building Kit?
Every 20×20 prefab steel building kit ships with the structural frame, roof and wall panels, fasteners, trim, and anchors required to stand up your structure. Free curbside delivery on every order, free professional installation on tubular configurations.
Free With Every 20×20 Metal Building Order
Everything you need ships free with no hidden fees
- 14-gauge galvanized steel frame20′ x 20′ footprint with leg height of your choice from 8′ to 12′
- Choice of 3 roof stylesRegular Roof, A-Frame Horizontal / Boxed Eave, or Vertical Roof for rain and snow runoff
- 29-gauge sheet metal panelsRoof and sides in your color choice, with mix-and-match options available
- 17 color optionsPick roof, walls, and trim independently from 17 metal building colors
- Galvanized purlins, girts, and bracingCold-formed steel secondary framing scaled to 20×20 spans
- All hardware includedFasteners, color-matched screws, sealing strips, brackets, bolts
- Painted flashings, trim, ridge capsColor-matched to your panel choices, 20-year paint warranty
- Foundation-matched anchorsConcrete, asphalt, mobile home, or auger anchors based on your install surface
- FREE delivery to all 48 statesCurbside delivery to your install address, no hidden freight charges
- FREE installation on tubular buildingsStandard on tubular-frame 20×20 builds. Most installs complete in one day.
- 20-year rust-through warrantyPlus 90-day workmanship guarantee on labor and assembly
+ Popular 20×20 Building Upgrades & Add-Ons
Optional add-ons to spec your 20×20 prefab building to its intended use
- Side panel enclosureConvert a 20×20 carport into a fully enclosed garage, shop, or storage building
- 12-gauge frame upgradeRecommended for heavy-use workshops, high-wind areas, and buyers wanting maximum frame strength
- 26-gauge sheet metal upgradeThicker panels for hail-prone regions, coastal exposure, and longer paint life
- Certified / engineered drawingsStamped plans for permit offices, HOAs, coastal zones, and snow-load jurisdictions
- Higher wind and snow ratingsCertified upgrades for coastal, mountain, Great Lakes, and tornado-prone regions
- Roll-up garage doors6’x6′, 8’x8′, 9’x8′, 10’x8′, or 10’x10′ roll-up doors for garage and equipment access
- Walk-in doors and framed openings32″ or 36″ personnel doors, double doors, framed openings for future windows or HVAC
- Windows24″x24″, 30″x30″, 36″x36″, or custom insulated glass for daylight and ventilation
- Insulation packagesSingle-bubble, double-bubble, fiberglass batt, or spray foam for conditioned use
- WainscotingTwo-tone lower wall panels for a premium garage, barn, or residential look
- Lean-to additionsAdd side coverage for firewood, mower parking, tractor attachments, or outdoor work areas
- Taller leg heightsChoose 10′ to 12′ for trucks, shelving, lifts, or larger equipment clearance
Customize & Build Your 20×20 Metal Building Online
Every option below is selectable in our free 3D builder. The 20×20 footprint stays fixed. Roof style, leg height, gauge, doors, colors, insulation, and finishes are yours to choose.
Leg Height (8′ to 12′)
On a 20×20, leg height typically runs 8′ to 12′. Carports work well at 8′ to 9′. Enclosed garages and workshops usually use 9′ to 10′. Choose 12′ if you plan to store a taller truck, add shelving, or use the building for equipment.
3 Roof Styles
Three roof choices are available on every 20×20 build. Regular Roof is the lowest-cost option. A-Frame Horizontal / Boxed Eave gives a classic peaked residential profile. Vertical Roof routes water and snow off the eaves and is recommended in rain and snow regions.
Roof Pitch & Slope
Standard 3:12 roof pitch on every 20×20. Upgrade to 4:12 pitch for snow zones, higher curb appeal, or better match to your home roofline. Cool roof coatings are available for warmer climates.
Frame Gauge (14 or 12)
14-gauge galvanized steel tubing comes standard on every 20×20. Upgrade to 12-gauge for heavier-duty garages, high-wind locations, coastal exposure, or workshops that will see daily use.
Sheet Metal Gauge (29 or 26)
29-gauge sheet metal panels are standard for the 20×20 roof and walls. Upgrade to 26-gauge in hail-prone areas, coastal zip codes, commercial storage applications, or when you want a heavier panel package.
Certification & Engineering
Certified 20×20 buildings include stamped engineered drawings, wind and snow calculations, and foundation recommendations matched to your county or permit office requirements.
Roll-Up Garage Doors
Roll-up doors from 6’x6′ to 10’x10′ are available on the 20×20. Popular garage layouts use one 9’x8′ or 10’x8′ roll-up door. Add a wider or taller door for trucks, ATVs, trailers, or boat storage.
Walk-In Doors
32″ or 36″ walk-in doors with full frames, weatherstripping, and locksets. Add one on the side wall for daily access without opening the garage door.
Hydraulic & Rapid Doors
Hydraulic and rapid-roll doors are available for commercial or high-cycle use, but most 20×20 residential garages use standard roll-up doors with manual or opener-ready operation.
Windows & Skylights
24″x24″, 30″x30″, or 36″x36″ insulated glazing options bring daylight into workshops and hobby rooms. One or two windows are common on a 20×20 enclosed building.
Framed Openings
Order framed openings now for future doors, windows, HVAC units, exhaust fans, or wall penetrations. This prevents cutting into finished panels later.
Garage Door Openers & Windows
Chain-drive, belt-drive, or smart Wi-Fi garage door openers are available. Window kits in roll-up doors add daylight while keeping the building secure.
17 Standard Color Options
All 17 standard color options are available on the 20×20: Barn Red, Beige, Black, Brown, Burgundy, Burnished Slate, Clay, Galvalume, Green, Patriot Red, Pewter Gray, Quaker Gray, Rawhide Tan, Royal Blue, Sandstone, Slate Blue, and White.
Mix-and-Match Roof, Walls, Trim
Pick separate colors for roof, walls, and trim. Popular 20×20 combinations include White walls with Black trim, Pewter Gray with Black roof, or Barn Red with White trim for a classic backyard barn look.
Wainscoting (Two-Tone Walls)
Wainscoting on a 20×20 means lower wall panels in a contrasting color. It adds curb appeal and helps the building match a home, barn, or detached garage.
Galvalume (Bare Metal Finish)
Galvalume is a hot-dipped aluminum-zinc coating with no paint. It is cost-effective, corrosion resistant, and popular for rural, farm, and utility buildings.
Painted Trim & Flashings
Color-matched ridge caps, eave trim, corner trim, gable trim, and screws ship with every 20×20. The paint warranty covers the exterior painted surface.
Custom Color Match
Need to match an existing house, HOA requirement, barn, or commercial color? Custom color matching is available for an upcharge. Ask your building advisor for samples before ordering.
Insulation Options
Single-bubble radiant barrier works for basic condensation control. Double-bubble adds comfort for hobby use. Fiberglass batt and spray foam are available for workshops, home gyms, and conditioned storage.
Lean-To Additions
Add a lean-to to one side of your 20×20 for firewood, mower parking, tractor attachments, a covered entry, or outdoor project space without changing the main 400 sq ft footprint.
Mezzanines & Lofts
Lofts are possible in taller 20×20 builds, especially with 12′ legs. Use overhead storage for seasonal bins, camping gear, or lightweight supplies while keeping the main floor open.
Interior Partitions
Partition the 400 sq ft into a storage bay, tool room, office nook, or mechanical area. Most 20×20 owners keep the floor open for vehicle and workshop flexibility.
Trim, Anchors, Gables
Decorative trim, contrasting gables, and color-matched accessories help the 20×20 look finished and intentional on residential properties.
Flooring Prep
We don’t pour foundations, but we guide you on slab specs. For a 20×20, gravel works for open carports and equipment shelters, while a 4″ concrete pad is recommended for enclosed garages, shops, and hobby spaces.
Wind & Snow Certification
Standard 105 to 115 MPH wind and 25 to 35 PSF snow load are available depending on configuration and location. Certified upgrades are available for coastal, high-wind, and snow-heavy regions.
Permit-Ready Drawings
Stamped engineered drawings, foundation plans, and code calculations can be supplied for counties, HOAs, and local permit offices that require documentation.
Door Locks & Access Control
Slide bolts, keyed locksets, deadbolts, keypad entry, and smart garage door openers are available for secure storage of vehicles, tools, and equipment.
Fire Safety & Alarms
Smoke detectors, heat detectors, and Class ABC extinguishers are recommended if the 20×20 stores fuel, lawn equipment, batteries, or workshop tools.
Anchoring System
Concrete wedge anchors, asphalt anchors, mobile-home anchors, or auger ground anchors are selected based on your install surface and included with your build.
Solar & Roof-Top Loads
A 20×20 roof can support small solar packages, lighting, vents, and rooftop accessories when reinforced and engineered for the planned load.
20×20 Metal Building Codes, Permits & Engineering
Every 20×20 prefab steel building can be engineered, stamped, and certified to meet local building codes. Many counties require permits for 400 sq ft structures, especially when fully enclosed or placed on a permanent foundation.
We also follow plumbing codes, energy conservation standards, and any state or local requirements. Our team can provide code-stamped documentation for your 20×20 when required by your jurisdiction.
How to Maintain a 20×20 Metal Building
Seasonal upkeep on a 20×20 takes about 20 to 30 minutes. Regular attention keeps your 400 sq ft prefab steel building clean, weather-tight, and protected throughout the warranty period.
What Can You Do with 400 Square Feet?
A 20×20 metal building gives you a compact square layout for vehicles, tools, hobbies, storage, farm supplies, and small business use
2-Car Garage
Park two compact cars, one full-size vehicle plus storage, or motorcycles and tools in a secure enclosed garage
Workshop
Use the square footprint for a workbench wall, tool cabinets, project tables, and hobby equipment
Equipment Shelter
Protect tractors, ATVs, mowers, trailers, and outdoor gear from sun, rain, snow, and theft
Business Storage
Store inventory, supplies, contractor tools, signage, and jobsite materials in a lockable steel building
Roll-Up Door Access
Add a 9’x8′, 10’x8′, or 10’x10′ roll-up door for vehicles, trailers, and equipment access
Home Gym
Create a 400 sq ft fitness space with room for cardio, strength training, racks, and storage
Farm & Ranch Use
Shelter feed, tack, small implements, garden tools, and ranch supplies with all-steel protection
Backyard Storage
Store seasonal items, bins, bicycles, kayaks, pool gear, and outdoor equipment without a large footprint
3 Ways to Order Your 20×20 Metal Building
Customize a 20×20 in our free 3D builder, request a free custom quote, or talk directly with a building expert. Reservation deposits stay flexible, balance due after install.
Request Free 20×20 Quote
Free custom design, reply within 24 hours
Tell us your requirements and our 20×20 building advisors will design and price your custom steel building for free. Best path if you’re comparing carport, enclosed garage, workshop, or storage configurations.
- Free expert design consultation
- Permit and certification handled for you
- Custom layout and engineered drawings
- Quote delivered within 1 business day
Free quote. Flexible deposit to reserve after approval.
Build Your 20×20 in 3D
Design your 20×20 yourself, see live pricing
Use our interactive 3D metal building builder to spec every detail of your 20×20 build. Pick configuration, roof style, leg height, color, doors, windows, insulation, and watch live pricing update.
- Visual 3D customization tool
- Live pricing as you customize
- Reserve your build with flexible deposit
- Balance due only after installation
Free tool. Flexible deposit to reserve your build.
Talk to a 20×20 Building Expert
Fastest answers, call or chat now
Speak directly with a building advisor who specializes in residential and compact commercial metal structures. Get pricing, permit guidance, configuration help, and customization advice in a single phone call.
- Instant answers over the phone
- Expert advice on permits, codes, and sizing
- Walk-through of customization options
- Mon to Fri 8am to 6pm PST, Sat 9am to 3pm
Toll-free. Speak with an expert now.
How the 3D Builder Works
Design your ideal 20×20 metal building in minutes
1. Launch Builder
Open the builder in a new tab so you can keep this page available while designing.
2. Configure Your Building
Set size, roof style, certification, colors, doors, side panels, windows, and other custom options.
3. Save Your Design
Copy your configuration code or summary before returning to this product page.
4. Complete Your Request
Send us your final configuration and we will confirm pricing, scheduling, and installation details.
Ready to design your custom 20×20 metal building?
Tip:Keep this page open so you can return and submit your final configuration with ease.
How Much Does a 20×20 Metal Building Cost?
No hidden fees on any 20×20 prefab steel building. A 20×20 metal carport starts around $4,495, a fully enclosed 20×20 garage starts around $6,995, and a customized insulated workshop or storage building can reach $8,495 depending on doors, windows, roof style, certification, and upgrades.
Building Configuration
A 20×20 carport is the lowest entry point. Fully enclosing it as a garage adds wall panels, trim, doors, and labor. Workshops and storage buildings add windows, insulation, and interior-ready options.
Your Location
Delivery distance, regional labor rates, state-specific anchoring, wind ratings, and snow load requirements affect the final 20×20 price.
Steel Gauge
14-gauge galvanized tubing comes standard. The 12-gauge upgrade adds strength and is recommended for high-wind areas, heavy-use shops, and buyers who want a longer-lasting frame package.
Roof Style & Pitch
Regular Roof is the cheapest. A-Frame Horizontal adds residential curb appeal. Vertical Roof costs more but is recommended in rain and snow zones and often preferred for enclosed garages.
Certification
Certified 20×20 buildings with stamped drawings cost more but make permitting easier in areas that require documentation for 400 sq ft permanent structures.
Doors, Windows, Insulation
Each roll-up door, walk-in door, window, opener, and insulation package adds to the 20×20 price. Most enclosed garages use one roll-up door and one walk-in door.
20×20 Metal Building Complete Price Range
Range covers an open 20×20 carport at the low end through a fully enclosed 400 sq ft garage or workshop with vertical roof, walk-in door, roll-up door, windows, insulation-ready framing, and certification options.
Flexible Financing & Rent-To-Own
Choose the payment path that fits your project and budget
Traditional Financing
Credit Check Required
- Finance your metal building project
- Structured monthly payment options
- Terms based on lender approval
- Fast online application process
- Ownership from day one
Rent-To-Own (RTO)
No Credit Check
- No credit check required
- Simple approval process
- Low upfront commitment
- Convenient monthly payments
- Great for many standard metal structures
How Delivery & Installation Works
A simple step-by-step process for getting your 20×20 metal building installed
Place Your Order
Submit your request for the 20×20 configuration and confirm colors, doors, certification, roof style, and site details.
Step 1
Production Scheduling
Your order is scheduled according to manufacturing capacity and your configured metal building requirements.
Step 2
Prepare the Site
Make sure your jobsite is level and accessible before the install team arrives. Concrete, gravel, asphalt, or level dirt can work depending on your 20×20 configuration.
Step 3
Installation Day
Our crew installs the 20×20 metal building and verifies the final layout, door placement, anchoring, and exterior finish details.
Step 4
20×20 Metal Building Reviews from Verified Buyers
Homeowners, hobbyists, and small business owners across 48 states choose the 20×20 as a compact garage, storage building, workshop, or equipment shelter. A few of their stories below.
“Bought the 20×20 as a detached garage for my truck, mower, and tool storage. The vertical roof and roll-up door were worth it. Crew had it installed in one day and the building looks like it belongs with the house.”
“We use our 20×20 as a backyard workshop. Plenty of space for benches, saws, storage, and a small heater. The insulation package keeps it usable in winter and the payment plan made it easy.”
“Ordered a 20×20 carport for two vehicles and later enclosed the sides. It handled heavy rain and wind better than expected, and adding panels later was simple. Great size for the price.”
Compare 20×20 vs. Other Metal Building Sizes
Need a different footprint? Compare prices and customize any of these prefab steel building sizes in our free 3D builder. Every order ships free to 48 states.
| Feature | 16×20 Building | 20×20 Building | 20×30 Building | 24×24 Building |
|---|---|---|---|---|
| Square Footage | 320 SF | 400 SF | 600 SF | 576 SF |
| Use Capacity | 1-car + storage | 2-car square garage | 2-car + workshop | Wide 2-car garage |
| Access Potential | Very Good | Excellent | Excellent | Excellent |
| Roof Style | Customizable | Customizable | Customizable | Customizable |
| Best For | Compact garage | Balanced garage + storage | Garage workshop | Wider vehicle storage |
| Price 16×20 | You’re Here | Customize 20×30 | View 24×24 |
20×20 Metal Building FAQ: Cost, Permits, Sizes & Install
Answers on pricing, configurations, leg heights, roof styles, colors, permit requirements, foundations, and load ratings for the 400 sq ft 20×20 prefab steel building.
Request Your Custom Design & Quote
Tell us about your project and we’ll provide a custom design with exact pricing. No obligation, no pressure just helpful information to guide your decision.
🔒 A specialist calls within 1 business day. We never share your details.
Customize Other Metal Building Sizes
Nearby width and length variants across our full metal building lineup — buildings, carports, garages, barns, and RV covers.
Standard Metal Garages - 20 x 20 x 10
18x20 Metal Building Kits and Garages
Standard Metal Garages - 15 x 20 x 10 (Regular Roof)
Standard Metal Garages - 20 x 25 x 10 (Regular Roof)
Standard Metal Garages - 20 x 25 x 10 (Vertical Roof)
20×26 ATV, Mower, and Lawn Equipment Storage
20×26 Home Office and Hobby Room
20×26 Tractor Shed with Implement Storage
20×26 Small Business Inventory Storage
20×26 Collector Car and Motorcycle Showroom
20×26 Contractor Job-Site Tool and Material Storage
