20×40 RV & Boat Garage
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20×40 RV & Boat Garage, tall clearance for a Class A or pontoon.
12-foot side walls with a 12×12 roll-up door at one end fits most Class A motorhomes, fifth-wheels, and pontoon boats. Free delivery and install in 48 states.
🔧 Customize your build 9 options affect your price▼
- 800 sq ft fully-enclosed
- 12-ft side walls
- 12×12 roll-up door
- 180 mph wind certified
- 65 psf snow load
- 20-year rust warranty
- 14 ga. steel frame
- 30A RV outlet pre-wire
See how 800 sq ft fits your tall-clearance RV bay.
20 feet wide × 40 feet long × 12-foot walls. Fits a Class A motorhome up to 36 feet, fifth-wheel, or pontoon on its tandem trailer.
Indoor motorhome + boat protection.
12-foot side walls and a 12×12 roll-up door fit most Class A motorhomes, pontoons, and toy haulers with 3+ feet of side clearance.
Build your 20×40 RV & Boat 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
Everything in your RV & Boat Garage.
All variants ship with free delivery, installation, drawings, 20-year warranty.
RV & Boat Garage spec sheet.
How real buyers use RV & Boat Garage.
20×40 RV & Boat Garage, what makes it different.
Engineered for your county
Every 20×40 rv & boat 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: $255/mo, no credit check, 36–60 mo
- Financing: 0% promo APR · 84 mo term
- Cash discount: 4% on $10K+ orders
Why 20×40?
800 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.
- 20′ × 40′ footprint with 800 sq ft interior
- Permit-friendly in 96% of US counties
- Resale ROI $6,400–$9,600 added home value
Common questions from RV & Boat Garage shoppers.
The questions our team hears every week. Click any to expand the short answer.
How thick is the steel on a 20×40 metal building?
Standard frame: 14-gauge (1.5 mm) galvanized tubing. Optional 12-gauge upgrade (2.5 mm) for high-wind/snow zones. Roof + wall sheeting: 29-gauge standard, 26-gauge upgrade.
Do you deliver and install in my state?
Free delivery and installation in all 48 continental states. Hawaii and Alaska require custom freight quotes.
What’s the typical lead time?
Standard: 3 to 5 weeks from order to install. Rush delivery available for an additional $345.
Can I finance without a credit check?
Yes, rent-to-own through TimePayment requires zero credit pull. Just first month’s payment to activate.
What’s covered under the 20-year warranty?
20-year rust-through warranty on galvanized frame + 20-year paint finish warranty against fade and chalking. 90-day workmanship warranty on installation.
What real 20×40 RV & Boat Garage buyers say.
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Talk to a real metal-building specialist.
Our team has installed 42,000+ buildings. We answer technical, permit, and financing questions every day, usually in under 8 minutes.
Complete your RV & Boat Garage · Save 10% bundled
These add-ons ship and install with the same crew.
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RV & Boat Garage questions, answered.
Will my Class A motorhome actually fit?
20×40 with 12-foot walls and a 12×12 roll-up handles most Class A motorhomes up to 36 feet long, 8.5 feet wide, and 11 feet tall. Class A models over 36 feet, consider stepping up one length.
What’s included in the $12,225 RV spec?
The +$425 uplift over the base 20×40 build adds a 12×12 roll-up door upgrade (from the standard 9×8), a 30A NEMA TT-30 RV outlet pre-wire, and the 12-foot wall height. Everything else matches the standard structural spec.
Can I add a sewer dump connection?
Yes, the slab can be pre-poured with a 3-inch sewer stub and a 1.5-inch water hookup. Most owners add this during the concrete pour for $450–$850 to the slab cost.
How do I anchor a tall building in high wind?
12-foot walls with 180 mph wind certification requires concrete anchoring (no ground anchors). The slab includes engineered footings at each column, sized to your county wind zone.
Insurance discounts for indoor storage?
Most RV/boat insurance providers offer 10–25% off for buildings with a permanent enclosed structure versus open or covered storage. Ask your provider for the indoor-storage discount form.
Your RV & Boat Garage quote takes one minute.
Tell us your zip and the options you want. We’ll send back a same-day, all-in price.
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