Carport & Garage Sizing Guide for Northern California
Metal carport and steel garage sizing for wind exposure, snow load compliance, and foundation accuracy.
Improper sizing is the most common mistake when ordering a metal building. Before selecting dimensions, review our tight-space measuring guide, ground leveling requirements, California permit guidelines, and regional snow load engineering standards.
Width Guidelines
Structure width determines how many vehicles can park comfortably and whether doors can fully open without obstruction. Wider spans increase structural demand and may require upgraded framing depending on local wind exposure and enclosure type.
12-Foot Width
- Single commuter vehicle
- Compact cars
- Motorcycles
- Golf cart storage
18–20 Foot Width
- Two compact vehicles
- Sedan + motorcycle
- Compact SUVs
- Small equipment storage
22–24 Foot Width
- Two full-size trucks
- Large SUVs
- Pickup + small trailer
- Standard residential double carport
26–30 Foot Width
- Three vehicle storage
- Truck + ATV storage
- Ranch equipment
- Workspace along one side
30–40 Foot Width
- RV + multiple vehicles
- Boat storage
- Farm equipment
- Contractor fleet trucks
40+ Foot Wide Structures
- Commercial equipment storage
- Large agricultural shelters
- Fleet parking structures
- Multi-bay buildings
Length Guidelines
Structure length determines bumper clearance and maneuverability. Larger vehicles and trailers require additional depth to allow comfortable entry and exit.
20-Foot Length
- Standard passenger vehicles
- Compact SUVs
- Small pickup trucks
- Typical residential carport
25-Foot Length
- Full-size trucks
- Extended cab pickups
- Vehicles with rear racks
- Light contractor trucks
30-Foot Length
- Large pickup trucks
- Boat trailers
- Utility trailers
- Small camper trailers
35-Foot Length
- Class B or small Class C RV
- Travel trailers
- Work vans with ladder racks
- Contractor vehicles
40-Foot Length
- Large RV storage
- Fifth wheel trailers
- Commercial vans
- Equipment trailers
45+ Foot Length
- Class A motorhomes
- Fleet vehicle storage
- Transport trailers
- Agricultural equipment
Leg Height & Clearance
Leg height refers to the side wall clearance of the structure. Because standard buildings use a pitched roof, the center peak height will always be higher than the leg height.
6–8 Foot Leg Height
- Compact vehicles
- Standard sedans
- Motorcycles
- ATVs
9–10 Foot Leg Height
- Full-size SUVs
- Pickup trucks
- Small cargo vans
- Standard residential coverage
11–12 Foot Leg Height
- Box trucks
- Class B RVs
- Large cargo vans
- Lifted trucks
13–14 Foot Leg Height
- Class C motorhomes
- Large travel trailers
- Small commercial trucks
- Farm equipment
15–16 Foot Leg Height
- Class A motorhomes
- Large fifth wheels
- Heavy equipment
- Commercial machinery
Custom Heights
- Agricultural storage
- Industrial buildings
- Equipment barns
- Engineered commercial structures
