30x20 Carport: Three-Car Fit, Depth and Cost Across 30 Feet
CarportBay Editorial Team Last verified
A 30x20 carport is 30 ft wide and 20 ft deep, 600 sq ft with three bays across. Three mid-size cars fit with 35.7 in per gap, but the 20 ft depth holds one vehicle per bay and cannot take two end to end.
Fit Checker
Pick one to three vehicles to see the door gap across the 30 ft width, the depth left in 20 ft and the height margin.
How big is a 30x20 carport?
A 30x20 carport measures 30 ft wide by 20 ft deep, so it covers 600 sq ft. Sellers list the footprint as a 30x20, a 30 x 20 carport or a carport 30x20. Width is written first, so the 30 ft side runs across the front. In inches it is 360 in wide and 240 in deep, the figures every door gap here is worked from.
Door gap is the open width left beside and between parked vehicles. Leg height, also called eave height, is the height of the vertical posts. A single bay is one third of the footprint. For one bay on its own, see the single-vehicle carport size.
Sellers also list this footprint as a 30x21. One 30x21 listing has a roof 21 ft long on a frame 20 ft long, so confirm the frame dimensions before planning around a few inches. With 2.5 in leg tubing at each outer edge, as Alan's lists on its 20x30 frame, the clear width between the legs is about 355 in. That trims each door gap for three Camrys by about 1.2 in, to 34.5 in. For other widths and depths, use the carport size guide and sizing calculator.
How many cars fit in a 30x20 carport?
A 30x20 carport fits three mid-size cars side by side when the 30 ft side is the width. The door gap is the width of each open space beside and between vehicles. It equals the footprint width minus the summed vehicle widths, divided by the vehicle count plus 1, so three vehicles leave four spaces. The same arithmetic applies to any carport 30 x 20 listing. The gap formula is the one used for the 20x20 carport.
Every figure below is arithmetic on published vehicle dimensions, worked out by the Editorial Team and never measured on site. Widths exclude mirrors unless a row says so. A gap under 30 in is marked tight.
| Vehicle set | Body widths (in) | Free width (in) | Gap per space (in) | Verdict |
|---|---|---|---|---|
| Three 2025 Toyota Camrys | 72.4 each | 142.8 | 35.7 | Clear of the 30 in line |
| Three 2025 Honda CR-Vs | 73.5 each | 139.5 | 34.9 | Clear of the 30 in line |
| Three 2026 Ford F-150s, body width | 79.9 each | 120.3 | 30.1 | At the 30 in line |
| Three 2026 Ford F-150s, mirrors extended | 95.7 each | 72.9 | 18.2 | Tight |
| Three 2025 Chevrolet Silverado 1500 crew cabs | 81.1 each | 116.7 | 29.2 | Tight |
| A 2025 Toyota Camry, a 2025 Honda CR-V and a 2026 Ford F-150 | 72.4, 73.5, 79.9 | 134.2 | 33.6 | Clear of the 30 in line |
Results use published vehicle dimensions and the nominal 30 ft by 20 ft footprint. Measure your own vehicle and confirm your seller's frame dimensions.
Three sedans or crossovers across 30 ft
Three 2025 Toyota Camrys, each 72.4 in wide, leave 35.7 in (3 ft) per gap across the 30 ft width of a 30x20 carport. Three 2025 Honda CR-Vs, each 73.5 in wide, leave 34.9 in per gap. A mixed set of a Camry, a CR-V and an F-150 leaves 33.6 in. All three results clear the 30 in mark.
Three pickups and the mirror gap
Three 2026 Ford F-150s, each 79.9 in wide, leave 30.1 in per gap, which sits at the 30 in mark. With mirrors extended to 95.7 in each, the gap falls to 18.2 in, and with mirrors folded to 83.6 in it is 27.3 in. Three 2025 Chevrolet Silverado 1500 crew cabs, each 81.1 in wide, leave 29.2 in.
Pickups fit across 30 ft with less room at the doors. After 2.5 in leg tubing at each edge, three F-150s leave 28.8 in per gap, under the 30 in mark.
How much depth does a 20 ft deep carport leave?
The 20 ft depth of a 30x20 carport is 240 in, enough for one vehicle in each bay. A 2025 Toyota Camry, 193.5 in long, leaves 46.5 in (3.9 ft) behind it, and a 2025 Honda CR-V, 184.8 in long, leaves 55.2 in. Full-size pickups sit at the limit of the depth.
A 2025 Chevrolet Silverado 1500 crew cab is 241.4 in long, 1.4 in longer than the depth. A 2026 Ford F-150 in its longest configuration is 243.9 in, 3.9 in longer, while its shortest configuration is 209.4 in and leaves 30.6 in. At 30 ft of depth the same crew cab clears with 118.6 in left, as the 30x30 carport dimensions show.
| Vehicle or pair | Length (in) | Left in 240 in | Result |
|---|---|---|---|
| 2025 Toyota Camry | 193.5 | +46.5 in | Fits |
| 2025 Honda CR-V | 184.8 | +55.2 in | Fits |
| 2026 Ford F-150, longest configuration | 243.9 | -3.9 in | Over the depth |
| 2025 Chevrolet Silverado 1500 crew cab | 241.4 | -1.4 in | Over the depth |
| Two 2025 Toyota Camrys end to end | 387.0 | -147.0 in | Does not fit |
Check whether a listing's 20 ft is the frame depth or the roof depth, because one 30x21 listing has a 21 ft roof on a 20 ft frame. The limit is the same on narrower sizes with the same 20 ft depth.
Why two vehicles cannot park end to end
Two 2025 Toyota Camrys parked one behind the other measure 387.0 in bumper to bumper, 147.0 in over the 240 in depth. A 30x20 carport therefore holds one vehicle per bay and cannot take two end to end. Two Camrys in a row need about 32.3 ft before any space between them. For that layout, start with the 20x40 carport dimensions.
Is a 30x20 carport the same as a 20x30?
A 30x20 carport and a 20x30 carport cover the same 600 sq ft, turned 90 degrees from each other. The first number is the width. The 30x20 puts the 30 ft side across the front for three bays, and the 20x30 puts the 20 ft side across the front for two bays. Sellers list both names for the same footprint, so read the width in the listing and not the order of the numbers. The 20x30 carport layout works the same arithmetic with two bays and 360 in of depth.
What changes when the frame spans 30 feet?
A 30x20 carport spans 30 ft across its front, so each frame line carries the roof over a wider opening than a 20 ft carport does. A frame line is a pair of legs and the bow between them. Where a seller states 5 ft on center, a 20 ft length has 5 frame lines and a 30 ft length has 7.
Turned the other way, the same 600 sq ft has 7 frame lines that each span 20 ft, against 5 lines that each span 30 ft. This is arithmetic on the sellers' stated spacing and is not a structural calculation.
Each of the four listings read for a 30x20 metal carport states a 14 gauge frame, and Carport Central also lists 12 gauge.
What sellers state about wind and snow
Table 4 prints what each seller states on its own listing, read on October 5, 2026. These are the sellers' figures and not CarportBay figures. None of the four listings names a code edition in the text read, and a seller's rating says nothing about the loads your local code sets.
| Seller and listing | Frame and spacing | Wind and snow listed | Certification wording |
|---|---|---|---|
| Alan's, 30x20 regular roof | 14 gauge; 5 ft on center, 4 ft upgrade | 150 mph; 35 PSF | "certified for 150 mph and 35 psf 5' on center" |
| Metal Carport Depot, 30x21 boxed eave | 14 gauge; legs and bows 5 ft on center | 140 MPH; 25 PSF | Existing slab with footing, or helical anchors |
| Carport Central, 30x21 vertical roof | 12 or 14 gauge frames | Varies with local loads | "Built to Local Code" |
| Angus, 30x20x8 vertical roof | 14 gauge frame | Not stated | "Engineer-certified structure" |
Wind and snow loads depend on the site, so the local building department decides which apply.
How tall should the legs of a 30x20 carport be?
A 30x20 carport with 8 ft legs clears a 2025 Toyota Camry, 56.9 in tall, by 39.1 in, and a 2026 Ford F-150, 80.7 in tall at its tallest, by 15.3 in. Leg height is measured at the top of the posts, so the roof peak sits higher.
| Vehicle | Height (in) | 6 ft leg (72 in) | 8 ft leg (96 in) | 9 ft leg (108 in) |
|---|---|---|---|---|
| 2025 Toyota Camry | 56.9 | +15.1 | +39.1 | +51.1 |
| 2025 Honda CR-V | 66.5 | +5.5 | +29.5 | +41.5 |
| 2025 Chevrolet Silverado 1500 crew cab | 75.4 | -3.4 | +20.6 | +32.6 |
| 2026 Ford F-150, tallest figure | 80.7 | -8.7 | +15.3 | +27.3 |
At 6 ft legs the F-150 is 8.7 in taller than the posts and the Silverado 1500 crew cab is 3.4 in taller. Six foot legs suit only the Camry and the CR-V of these four. Alan's lists 6 ft as the standard leg height on its 30x20 vertical roof carport and says the height can be raised in 1 ft steps to 16 ft.
What does a 30x20 carport cost in 2026?
Listed prices for a 30x20 carport run from $2,995 to $18,000 because the sources describe different things. A seller listing prices one product with its own roof, height and sides, and an installed cost guide prices a range of finished projects. Table 5 keeps them apart and shows the seller, the date and whether installation is included.
| Layer | Seller or source | Listed price | Read on | Installed? |
|---|---|---|---|---|
| Seller-installed | Alan's, regular roof | $2,995.00 | 2026-10-05 | Yes, 20 states |
| Seller-installed | Alan's, vertical roof | $3,495.00 | 2026-10-05 | Yes, 20 states |
| Seller-installed | Angus, 30x20x8 vertical roof, sale price | $4,562.25 | 2026-10-05 | Standard installation included |
| Seller-installed | Carport Central, 30x21x9 vertical roof | $8,927.00 | 2026-10-05 | Yes, included |
| Cost guide | HomeGuide, updated 2026-01-16 | $4,800 to $12,000 | 2026-10-05 | Installed range |
| Cost guide | Angi, Triple carport, updated 2026-05-03 | $6,000 to $18,000 | 2026-10-05 | Installed range |
Prices are listed by each seller on the date shown and change often. A listed price is not a quote.
On the listed 600 sq ft, Alan's regular roof works out to $4.99 per sq ft and its vertical roof to $5.83. The Angus sale price is $7.60 per sq ft.
The prices above cover the frame and roof. For which kits include legs, panels and hardware, see the carport kit buying guide.
Same seller, two orientations
Alan's Factory Outlet lists both directions of the same 600 sq ft. The 30x20 costs $600 more with a regular roof (+25.1 percent), $400 more with a boxed eave (+14.8 percent) and $400 more with a vertical roof (+12.9 percent). The listings state no reason for the gap, so Table 6 reports the difference and stops there.
| Roof and listing family | 20x30 | 30x20 | Difference |
|---|---|---|---|
| Regular roof | $2,395 | $2,995 | +$600 (+25.1%) |
| Boxed eave | $2,695 | $3,095 | +$400 (+14.8%) |
| Vertical roof | $3,095 | $3,495 | +$400 (+12.9%) |
Does a 30x20 carport need a concrete slab?
A 30x20 carport needs a slab only where the seller's installation terms or the site call for one. A slab for 600 sq ft costs about $3,000 to $6,000 at HomeGuide's $5 to $10 per sq ft, and about $2,400 to $4,800 at HomeAdvisor's $4 to $8 per sq ft. Metal Carport Depot's 30x21 listing names two ways to meet its certification basis: an existing slab with a proper footing, or the included helical anchors on a suitable surface.
Does a 30x20 carport need a permit?
A 30x20 carport covers 600 sq ft, which is 3.0 times the 200 sq ft permit exemption in IRC 2021 R105.2 for one-story detached accessory structures. Table 7 lists three published thresholds.
| Code or source | Threshold stated | A 600 sq ft carport | Source (read 2026-10-05) |
|---|---|---|---|
| IRC 2021 R105.2, item 1 | One-story detached accessory structures up to 200 sq ft are exempt from a permit | 3.0 times the line | Grant County, WA copy of the 2021 IRC |
| California 2025 codes | 120 sq ft for one-story detached tool and storage sheds, playhouses and similar uses; carports are not named | 5.0 times the line | Mammoth Lakes, CA, 2025 California codes page |
| Henrico County, VA | 256 sq ft for tool and storage sheds, playhouses or similar uses, one story at most | 2.34 times the line | Henrico County permit center |
This table gives general information from the codes cited above. Confirm current requirements with your local building department before beginning construction.
California's 120 sq ft and Henrico County's 256 sq ft are written for sheds and similar uses, and neither names carports. At 600 sq ft the carport is 5.0 and 2.34 times those lines.
When does another size fit better than a 30x20?
A 30x20 carport suits three mid-size vehicles with one vehicle deep in each bay. Another size fits better when vehicles are longer, when two need to park end to end, or when only two need cover. Table 8 works the same arithmetic for five neighboring footprints.
| Size | Area | What changes | More detail |
|---|---|---|---|
| 20x30 (20 ft wide) | 600 sq ft | Two bays across 20 ft and 166.5 in of depth behind a Camry | 20x30 carport layout |
| 30x25 (30 ft wide) | 750 sq ft | 300 in of depth: a Silverado leaves 58.6 in, two Camrys still do not fit | Worked on this page |
| 30x30 (30 ft wide) | 900 sq ft | 360 in of depth: a Silverado leaves 118.6 in, two Camrys are 27.0 in over | 30x30 carport dimensions |
| 30x40 (30 ft wide) | 1,200 sq ft | 480 in of depth: two Camrys fit end to end with 93.0 in left | 30x40 carport |
| 24x24 (24 ft wide) | 576 sq ft | Two bays across 24 ft, 47.7 in per gap for two Camrys, and 288 in of depth | 24x24 carport dimensions |
The 30x25 row adds 5 ft of depth, though two Camrys still do not fit end to end. The 30x40 carport is the size where two cars fit end to end in each of three bays. Readers who need only two vehicles can start with the 24x24 carport dimensions.
A 30x20 carport fits three mid-size cars across its 30 ft width. Three 2025 Toyota Camrys leave 35.7 in per gap, and three 2026 Ford F-150s leave 30.1 in, or 18.2 in with mirrors extended. Depth holds one vehicle per bay.
A carport 30 ft wide fits three mid-size cars side by side, and its depth must exceed the longest vehicle. At 20 ft deep a Camry leaves 46.5 in and a crew-cab Silverado 1500 is 1.4 in over. A 30x25 leaves 58.6 in behind that Silverado.
Seller listings run from $2,995 for Alan's regular roof to $8,927 for a 30x21 with a 9 ft vertical roof, both installed. Installed cost guides run $4,800 to $18,000. Table 5 shows the date of every price.
A 30x20 carport at 600 sq ft is 3.0 times the 200 sq ft exemption in IRC 2021 section R105.2. California uses a 120 sq ft shed line and Henrico County, VA uses 256 sq ft. The local building department decides, so confirm with it before building.
A 30x20 carport and a 20x30 carport cover the same 600 sq ft, turned 90 degrees. The first number is the width, so the 30x20 has three bays across 30 ft and 20 ft of depth. Read the width in each listing, because sellers price the two differently.
Eight foot legs clear a 2025 Camry by 39.1 in and a 2026 F-150 by 15.3 in. At 6 ft legs the F-150 is 8.7 in taller than the posts, so allow for a roof rack.
Next steps for your 30x20 carport
Test your own vehicles in the Fit Checker near the top of this page, then confirm the frame width, depth and leg height with the seller. The CarportBay carport size guide covers the other footprints.
Share your ZIP code and project details in the form at the end of this page.
Sources
Vehicle dimensions come from the makers or the listings named below, prices and frame statements from seller listings and cost guides, and codes from the code bodies and local permit pages. All were checked on October 5, 2026 unless noted.
- Honda, 2025 CR-V specifications: CR-V dimensions.
- Ford, F-150 specifications: F-150 width with and without mirrors.
- Cars.com, 2025 Toyota Camry: Camry dimensions, secondary listing.
- Dimensions.com, Silverado 1500 Crew Cab: Silverado dimensions, secondary listing.
- Grant County, WA, IRC 2021 R105.2: 200 sq ft exemption.
- Town of Mammoth Lakes, CA: 120 sq ft threshold under the 2025 California codes.
- Henrico County, VA: 256 sq ft threshold.
- Alan's Factory Outlet, 30x20 regular roof: price, frame, spacing and listed ratings.
- Alan's Factory Outlet, 30x20 vertical roof: price and leg heights.
- Alan's Factory Outlet, 30x20 boxed eave: price for the same-seller pair.
- Alan's Factory Outlet, 20x30 regular roof: price for the same-seller pair, tubing size.
- Alan's Factory Outlet, 20x30 boxed eave: price for the same-seller pair.
- Alan's Factory Outlet, 20x30 vertical roof: price for the same-seller pair.
- Metal Carport Depot, 30x21 boxed eave: frame, spacing, listed ratings and certification basis.
- Carport Central, 30x21 vertical roof: price, frame gauges and certification wording.
- Angus Portable Buildings, 30x20x8 vertical roof: sale price and certification wording.
- HomeGuide, metal carport prices: installed range, slab and permit costs.
- Angi, metal carport installation cost: Triple carport installed range.
- HomeAdvisor, carport cost: slab cost per sq ft.
Last verified: October 5, 2026
Last verified: October 2026. Prices were checked on October 5, 2026, and each price row shows its own date.
Ready to move forward
Get Matched With Installers Near You
Tell us a bit about your project and we will connect you with vetted installers and manufacturers who serve your area. There is no cost or obligation to request information.
See the affiliate disclosure page for how referrals work.