20×20
Compact two-car shopping class where vehicle width and door clearance can be the limiting issue.
Home 2-Car Carports: Dimensions, Fit & Buying Guide
2-Car Carports: Dimensions, Fit & Buying Guide
A two-car carport should be sized from the two vehicles and the access space between and around them. “20×20” and “double carport” are useful shopping labels, but neither guarantees comfortable usable width.
Two-car capacity is a clear-width problem first
For side-by-side parking, add both vehicle widths, the desired gap between them and usable room between each outside vehicle and the nearest post or edge. For tandem parking, width drops but the two vehicle lengths and longitudinal gap are added instead.
The Carport Size Calculator lets you switch between those arrangements rather than assuming a nominal 20-ft roof is automatically a comfortable two-car structure. If one or both vehicles are pickups or work trucks, use Truck Carports to account for longer bodies, mirrors, racks and modified height.
Current “double” and 20-ft-class products use different geometry
| Current example | Documented evidence | Two-car implication |
|---|---|---|
| Arrow 20×20×7 | 19 ft 8 in stored usable clear width; 20 ft 2 in exterior width | Clear width is narrower than exterior width, and an entrance-height source conflict prevents overconfident fit labeling. |
| VersaTube Classic 20×20×10 | 20 ft roof width; 18 ft frame length; 10 ft 7⅝ in ground-to-truss | Useful vertical and length geometry exists, but clear width still needs verification. |
| Canopia Arizona Double 16×19 | About 18 ft 11½ in exterior width with two-post architecture | “Double” is a product-family label; vehicle fit still depends on actual vehicle widths and post geometry. |
| Canopia Oslo 20×20 | About 19 ft 6⅞ in × 19 ft 11⅛ in exterior; configurable post position | Changing post position can change access geometry and published snow-load conditions. |
20×20, 20×30 and 24×30 solve different two-car problems
20×24
Adds four feet of nominal depth over 20×20 when width works but longer vehicles or front/rear clearance need more room.
20×30
Adds depth for longer vehicles, tandem use, storage or a work zone without solving a width problem by itself.
24×30
More width for larger vehicles, easier door opening and circulation when the site allows it.
Two additional validated size classes are now available: 18×20 when site width is tighter, and 24×24 when a square/wider planning envelope is more useful. Neither size is an automatic two-car guarantee.
Size your two actual vehicles before choosing the product
Use the calculated clear envelope as the requirement. Then let the Finder separate documented product possibilities from installed-provider options.
When to size up—or change the layout
- Both vehicles are wide pickups or SUVs and daily door access matters.
- You need storage, charging equipment, bicycles or a work zone beside the vehicles.
- Posts or braces reduce usable width compared with roof coverage.
- A third vehicle is part of the real requirement; use the 3-Car Carports decision instead of forcing three vehicles into a two-car label.
If the extra space is really for tools or equipment, a carport with a dedicated storage bay may be cleaner than widening the open parking area indefinitely. If weather/security requires walls around the vehicles, review Enclosed Carports and the Carport vs Garage boundary.
Once products are narrowed, use Compare Carports and the Project Cost Calculator rather than comparing headline prices alone.
Technical and product references
- Arrow 20×20×7 Manufacturer source for a current 20-ft-class steel carport with normalized usable-width evidence and a retained height conflict.
- Canopia Arizona Double 16×19 Manufacturer double-carport example with two-post architecture and published exterior dimensions.
- Canopia Oslo 20×20 Manufacturer source showing flexible post positioning and exterior dimensions in the 20-ft class.
Frequently asked questions
Is a 20×20 carport big enough for two cars?
Sometimes, but not automatically. Two vehicle widths plus door-opening and walking room must fit within the usable clear width between posts or structural members, and the exact roof/frame footprint must fit the site.
What is a good width for a two-car carport?
There is no single width that works for every pair of vehicles. Use the actual widths of both vehicles plus the side and between-vehicle clearances you want, then compare that required clear width with exact product geometry.
Can two SUVs fit under a 20-foot-wide carport?
Possibly, but the answer depends on the SUVs, mirrors, access clearance and actual post spacing. A nominal 20-foot roof does not guarantee 20 feet of usable clear parking width.
Should a two-car carport be side-by-side or tandem?
Side-by-side requires much more clear width but usually less depth. Tandem reduces width but requires the combined vehicle lengths plus front, rear and between-vehicle clearance. Use the size calculator to compare both layouts.
Should I choose a kit or installed two-car carport?
Choose based on the site, desired roof/enclosure, assembly tolerance and local structural requirements. Exact shipped kits can be compared by documented model geometry; installed structures are typically configurable and should be matched through provider capability and service area.