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18×20 One-Car Garage | Steel and Stud — From $5,300
12
18×20 One-Car Garage
In stock · ships 3–5 wk
Starting from$6,050$5,300SAVE $750
or $110/mo · $0 down · no credit check
HomeMetal Buildings18×20One-Car Garage
★★★★★4.8(verified buyers)✓ Verified Buyers

18×20 One-Car Garage, built for daily backyard use.

Homeowners replacing a tired wood-frame garage pick this footprint because it fits a full-size sedan or mid-size SUV with 3 ft of side clearance for opening doors. The extra 2 ft over a 16-wide gives you a real.

You're viewing:One-Car Garage·Size18×20·Slate Gray
Starting from your selected configuration$5,300$6,050Save $750
or as low as $110/mo · 0% APR · No credit RTO
ℹ️This is an estimate. Final pricing is locked after our sales team reviews your complete requirements (site access, ground type, county-specific certifications, optional upgrades). You'll receive a written all-in quote within one business day of your request — no surprises, no hidden fees.
📐 Size footprint dimensionsSelected: 18×20
18×20
this size
$5,300
18×26
longer
$6,900
20×20
wider
$5,900
📏 Side wall height interior headroomSelected: 9′
7'
8'
9'
10' +$340
12' +$640
14' +$1180
🎨 Roof & trim color applied to building aboveSelected: Slate Gray
Slate Gray
🔧 Customize your build 9 options affect your price
🏗️
Roof Stylevertical sheds snow/leaves naturally
🚪
Roll-Up Doorsfront-mounted garage doors
🪟
Windowsnatural light + ventilation
🚶
Walk-In Doorside entry with deadbolt
🌡️
Insulation Packageyear-round comfort & energy savings
🔩
Frame Gaugestructural steel thickness
📋
Sheeting Gaugeroof + side panel thickness
Anchoring Typefoundation attachment method
Electrical Pre-Wireconduit run for licensed electrician
Customizations selected:
Customization subtotal:+$485
  • 360 sq ft enclosed
  • 14 GA Frame
  • 9x8 Roll-Up Door
  • Free Install
  • 180 mph wind certified
  • 65 psf snow load
  • 20-year rust warranty
  • Free delivery + install
🚚
FREE delivery & installation in all 48 states. Concrete, asphalt, or compacted gravel.
SKU:SS-18X20-ONE-CAR-GARAGEBuilt:1,847+Since: 2002Made in: 🇺🇸 USA
🛡️
A+
BBB Accredited
4.8/5
customer rating
Since 2004
In Business
🏠
15,000+
Buildings
🇺🇸
48
States Served
We've provided builds for
FordAppleDiscovery ChannelU.S. ArmyGM
SPATIAL LAYOUT

See how 800 sq ft fits your 18x20 one-car garage.

18 feet wide × 20 feet long. Homeowners replacing a tired wood-frame garage pick this footprint because it fits a full-size sedan or mid-size SUV with 3 ft of side clearance for opening doors.

Pickup #1Pickup #2Workshop area18′ × 20′ · 360 sq ft

One-Car Garage layout.

Homeowners replacing a tired wood-frame garage pick this footprint because it fits a full-size sedan or mid-size SUV with 3 ft of side clearance for opening doors. The extra 2 ft over a 16-wide gives you a real walk-around. Adds resale value and code-compliant covered parking.

💡 Pro tip:One-Car Garage works well at 18×20 — add insulation + electrical for year-round use.
🎨 FREE 3D BUILDER

Build your 18×20 One-Car Garage in 3D.

Design your building yourself in our free Sensei3D Designer — drag doors and windows where you want them, swap roof + trim colors, and see your spec from every angle. Save your design and email it to yourself for later.

  • Drag-and-drop doors, windows, walk-ins anywhere on the building
  • 16 colors applied live to roof, walls, and trim — mix & match
  • Interior + exterior views of your spec, with measurements
  • Save your design and share it with your contractor or family
  • Auto-syncs to quote — what you build is what we price
✓ No login required✓ Works on phone & desktop✓ Used by 38,000+ buyers
Sensei3D Preview
LIVE 3D · DRAG TO ROTATE
— or —
📐 Use the Cold-Form Designer (engineer-grade specs)
WHAT'S INCLUDED

Everything in your One-Car Garage.

All variants ship with free delivery, installation, drawings, 20-year warranty.

🏗️
360 sq ft enclosed
Fully-enclosed 18×20 vertical-roof structure.
🚪
Roll-up + walk-in doors
Standard configuration door package.
🔩
14-gauge steel frame
American-rolled galvanized tubing.
🎨
1 standard color
Pick from 16 factory-baked finishes.
TECHNICAL SPECIFICATIONS

One-Car Garage spec sheet.

Width18'
Length20' + 6" overhang
Side height9' standard
Floor space360 sq ft
Doors1 × 9×8 roll-up
Walk-inOptional (+$345)
WindowsOptional
Windup to 180 mph
Snowup to 65 psf
RoofVertical 3:12
Frame14 ga (12 ga upgrade)
Sheeting29 ga (26 ga upgrade)
AnchoringConcrete · Asphalt · Ground
Lead time3 – 5 weeks
USE CASE EXAMPLES

How real buyers use One-Car Garage.

DAILY USEEveryday one-car garage
Everyday one-car garage
360 sq ft is the right size for daily use of a one-car garage.
STORAGE OVERFLOWone-car garage + seasonal storage
one-car garage + seasonal storage
Park or store equipment in the front half, leave the rear for seasonal storage and overflow.
FLEX ROOMExpansion-ready
Expansion-ready
Stud-framed interior makes it easy to add a partition, electrical, or insulation later.
FULL PRODUCT DETAILS

18×20 One-Car Garage — what makes it different.

360sq ft
Floor Space
180mph
Wind Rated
65psf
Snow Load
20yr
Rust Warranty
40yr
Paint Warranty
$110/mo
From RTO
🏗️

Engineered for your county

Every 18×20 one-car garage is fabricated from American-rolled galvanized steel and engineered against the exact wind and snow loads your jurisdiction requires.

  • Standard: 140 mph wind / 35 psf snow
  • 12-ga upgrade: 180 mph / 65 psf
  • Permit drawings stamped and emailed free
🔩

Construction details

The same materials commercial fabricators use — not residential-grade. Hot-dip galvanized fasteners, factory-baked siliconized polyester paint, Hilti-grade anchors.

  • Frame: 14-ga (12-ga upgrade) galvanized tubing
  • Panels: 29-ga G-90 (26-ga upgrade)
  • Fasteners: #14 self-drilling with EPDM washer
🚚

Free delivery & install — really free

Regional-route delivery plus 1–2 day on-site installation by a certified crew, bundled into your headline price. No hidden unloading fees, fuel surcharges, or site-prep charges.

  • $0 deposit · pay only after walkthrough sign-off
  • 3–5 week lead time on regional routes
  • All 48 states · rush option available
🛡️

Warranty & lifespan

Engineered for a 50-year service life with industry-leading warranties on every wear surface.

  • 20-yr rust-through warranty on frame & panels
  • 40-yr paint warranty against fading + chalking
  • 1-yr craftsmanship on installation
💳

$0-down financing

Three financing paths to fit any credit situation. The rent-to-own option requires no credit pull at all — fastest path to a closed deal.

  • RTO: $110/mo, no credit check, 36–60 mo
  • Financing: 0% promo APR · 84 mo term
  • Cash discount: 4% on $10K+ orders

Why 18×20?

360 sq ft sits in the sweet spot for residential and light-commercial — fits standard quarter-acre setbacks, comfortably below the 1,000 sq ft municipal threshold that triggers extra inspections.

  • 18′ × 20′ footprint with 360 sq ft interior
  • Permit-friendly in 96% of US counties
  • Resale ROI $2,880–$4,320 added home value
PEOPLE ALSO ASK

Common questions from One-Car Garage shoppers.

The questions our team hears every week. Click any to expand the short answer.

How thick is the steel on a Steel and Stud 18×20 metal building?

Standard frame: 14-gauge (1.5 mm) galvanized tubing. Optional 12-gauge upgrade (2.5 mm) for high-wind/snow zones. Roof and wall sheeting ships 29-gauge standard, 26-gauge upgrade available on order.

Does Steel and Stud deliver and install in my state?

Yes — free delivery and free installation in all 48 continental states, performed by certified Steel and Stud crews. Hawaii and Alaska use custom freight quotes; call 1-877-275-7048 for either.

What's the typical lead time for a 18×20 building?

Standard: 3–5 weeks from order confirmation to install completion. Fabrication runs the first 2–3 weeks at our US plant; regional delivery and 1-2 day install close it out. Rush builds available for $345.

Can I finance a Steel and Stud building without a credit check?

Yes — Steel and Stud's rent-to-own partner does not pull credit. Approvals typically run 8 minutes with proof of income and first month's payment. 36–60 month terms, no early-payoff penalty.

What's covered under the 20-year warranty?

Steel and Stud's 20-year rust-through warranty covers the galvanized frame against perforation, plus a 20-year paint-finish warranty against fade and chalk. Workmanship on the install is warrantied for 1 year. Warranty transfers to the next owner on resale.

CUSTOMER REVIEWS

What real 18×20 One-Car Garage buyers say.

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HAVE A QUESTION?

Talk to a real metal-building specialist.

Our team has installed 15,000+ buildings. We answer technical, permit, and financing questions every day — usually in under 8 minutes.

Complete your One-Car Garage · Save 10% bundled

These add-ons ship and install with the same crew.

Browse all 28 add-ons →
Bundle & Save
🏗️
Concrete Pad Pour
19×21×4″ slab to engineered spec.
$1,620+ Add
Most Added
🌡
R-19 Insulation Package
Roof & wall batt, vinyl-faced.
$1,795+ Add
💧
Gutter & Downspout Kit
Seamless aluminum, color-matched.
$485+ Add
200-Amp Sub-Panel Pre-Wire
Conduit + sub-panel housing.
$695+ Add
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FREQUENTLY ASKED

One-Car Garage questions, answered.

How much does a 18×20 one-car garage cost?

A 18×20 one-car garage from Steel and Stud starts at $5,300 with free delivery and free installation across all 48 states. Most buyers pick the rent-to-own option at about $110/month with $0 down and no credit check. Call 1-877-275-7048 for a same-day price lock.

Is delivery and installation included in the 18×20 one-car garage price?

Yes — every Steel and Stud one-car garage ships with free delivery + free installation by a certified crew, included in the listed price. Anchored to a concrete pad, asphalt, or compacted gravel, your building is fully erected in 1–2 days after the truck arrives.

Do I need a permit for a 18×20 one-car garage?

Almost always for 360+ sq ft enclosed buildings. Steel and Stud emails engineered drawings stamped for your wind zone (up to 180 mph) and snow zone (up to 65 psf) at no charge, so your local building department has everything it needs. Permit timing typically runs 2–6 weeks by jurisdiction.

How is a Steel and Stud one-car garage different from a wood-frame build?

Steel solves the problems wood creates — no rotting, no termites, no warping, no painting every 3 years. Our 14-gauge galvanized frame carries a 20-year rust warranty and ships with a 180 mph wind / 65 psf snow rating already engineered in. A comparable wood build typically costs 2–3× more and needs ongoing maintenance.

What foundation does a 18×20 one-car garage need?

A 4-inch concrete pad poured 1 foot wider and longer than the building is the standard. Steel and Stud also anchors to asphalt or compacted gravel for open or semi-enclosed configurations. A pad-pour bundle is offered at checkout if you don't already have a slab.

How fast can I get a 18×20 one-car garage delivered?

Standard lead time is 3–5 weeks from order to install. Fabrication runs the first 2–3 weeks at our US plant; regional delivery + 1–2-day install by a certified Steel and Stud crew closes out the order. Rush builds are available — call 1-877-275-7048 for current capacity.

Can I finance a 18×20 one-car garage without a credit check?

Yes — Steel and Stud's rent-to-own partner does not pull credit. Approvals close in about 8 minutes with proof of income and your first month's payment. Terms run 36–60 months with no early-payoff penalty, and the monthly works out to roughly $110/month on a 18×20 one-car garage.

What warranty comes with the 18×20 one-car garage?

Steel and Stud backs every building with a 20-year rust-through warranty on the galvanized frame and a 10-year sheeting warranty on the 29-gauge panels (upgradeable to 26-gauge or 12-gauge). Workmanship on the install is warrantied for 1 year. Full warranty terms ship with your order packet.

Can I customize the 18×20 one-car garage in 3D before I order?

Yes — our free Sensei3D Designer lets you drag and drop doors, windows, and walk-ins; swap 16 roof + trim colors live; and rotate the building in 3D from every angle. No login required. The design saves directly to a quote so what you build is exactly what we price.

Does a 18×20 one-car garage add resale value to my home?

An enclosed 18×20 one-car garage typically adds $2,880–$4,320 in resale value per regional comp data, and most insurance carriers reduce premiums for indoor vehicle / equipment storage. Steel and Stud's 20-year rust warranty transfers to the next owner.

Ready to build?

Your One-Car Garage quote takes one minute.

Tell us your zip and the options you want. We'll send back a same-day, all-in price.

✓ 4.8★ · verified buyers✓ BBB A+✓ 24 years✓ $0 deposit · pay after install
FREE • NO-OBLIGATION QUOTE

Get Your Free Custom Building Quote

Tell us what you need and a building specialist will send your custom pricing — usually within 1 business day. No payment required.

✓ Free delivery & install✓ 20-year warranty✓ Engineer-certified

🔒 A specialist calls within 1 business day. We never share your details.

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