Planning the construction of a car shelter is not just a matter of site aesthetics, but a complex engineering task that requires precise calculations. If you are thinking about building carport for two cars, the dimensions of the structure become a critical factor affecting safety and ease of use. An error in calculating the width or height can lead to parking becoming cramped, and the risk of damage to the body by neighboring cars or frame elements will increase many times over.
Modern cars have different dimensions, and designing a structure “back to back” is a risky decision. It is necessary to take into account not only the family’s current vehicle fleet, but also a possible change in equipment in the future. Correctly calculated canopy project provides protection from precipitation, hail and scorching sun, while maintaining free access to the doors and trunk.
In this article we will examine in detail the standards and recommendations for creating a comfortable space for parking two vehicles. You will learn how to determine the optimal distances, what type of roof to choose and what nuances to consider when installing support posts.
Standard dimensions and minimum requirements
Determining the exact dimensions begins with an analysis of the cars that will be under the shelter. Standard carport size for two cars usually varies depending on the class of equipment, but there are generally accepted building codes. For middle-class passenger cars (C-class), the minimum width of one parking space is 2.5 meters.
If we add two standard seats, we get a width of 5 meters, but this is absolutely not enough for comfortable use. There should be space between cars to open doors, disembark passengers and load things without the risk of touching the adjacent body. Therefore optimal width the general design starts from 6 meters.
⚠️ Attention: When calculating the width, keep in mind that the doors of modern cars can swing open to an angle of up to 90 degrees or more. The narrow opening between the pillars may make it impossible to exit the vehicle if it is parked close to the pillar.
The length of the carport is also important, especially if you plan to park cars nose-to-nose or have space to store garden equipment in the back. The standard length of one parking space is 5.5–6 meters. For two cars standing in a row, the depth of the structure remains the same, but if you plan to park next to each other, the length is doubled.
Calculation of the width and distance between racks
The most critical parameter during construction is the distance between the central support pillars. This is where space conflicts most often occur. If you are building carport for two cars, the dimensions of the span between the internal racks should allow the doors to be freely opened on both sides.
The minimum permissible distance between internal supports is 2.5–3 meters. However, experienced builders recommend making this span wider - about 3.5 meters. This will ensure comfortable passage between cars even in winter, when snow or ice may accumulate on roofs and thresholds.
- 🚗 For sedans and hatchbacks, the minimum gap between the pillars is 2.5 meters.
- 🚙 For SUVs and crossovers (SUVs), it is advisable to increase the clearance to 3 meters.
- 🚐 If you plan to park minivans, the distance should be at least 3.2–3.5 meters.
It is also important to consider the distance from the outer pillars to the car body. It should be at least 0.5–0.7 meters. This is necessary so that when opening the outer door, the passenger does not hit the post and does not scratch the door on the rough surface of the support.
Optimal height of the structure
The height of the canopy is a parameter that is often underestimated, focusing only on human height. However, it is necessary to remember the dimensions of the tallest car in the family, as well as the possible installation of a roof rack. Standard canopy height when clear (from the covering to the bottom point of the roof) should not be less than 2.3 meters.
For tall SUVs such as Toyota Land Cruiser or Land Rover Defender, with a box installed on the roof, the height can reach 2.5–2.7 meters. In this case, the total height of the structure must be raised to 3 meters or more in order to comply with wind loads and technological clearances.
⚠️ Attention: Don't make the canopy too low in hopes of saving on materials. A low roof impairs ventilation, promotes the rapid accumulation of exhaust gases and creates a “greenhouse” effect, which is harmful to the paintwork.
If you plan to install automatic gates or roller shutters at the end of the canopy in the future, the height should be calculated with a margin for mounting boxes and guides. This usually adds another 15–20 cm to the minimum height.
Types of roofing and their effect on dimensions
The choice of roofing material directly affects the design of the rafter system and, consequently, the dimensions of the canopy. Different materials have different weights and require different slopes for effective drainage. Polycarbonate, for example, is lightweight and allows you to create wide spans without massive beams.
Metal tiles and corrugated sheets require more frequent lathing and observance of the slope angle (usually at least 12 degrees), which can visually increase the height of the structure on one side. Heavy materials, such as natural tiles or slate, will require strengthening the support posts and reducing the spacing between them.
Comparison of roofing materials
Polycarbonate allows light to pass through, but can become noisy when it rains. Metal tiles are durable, but require good sound insulation. Corrugated sheeting is a budget option, but less aesthetically pleasing.
When using soft overlay materials on flat roofs, it is necessary to provide for the organization of internal drainage or slopes towards funnels, which also affects the overall geometry of the structure. It is important that the roof overhangs extend beyond the perimeter of the parking spaces by at least 0.5 meters on all sides.
Table of recommended sizes for different car classes
To simplify the calculations, we suggest that you familiarize yourself with the summary table, which will help determine the basic parameters of the future structure. The data is given taking into account the margin for comfort and safety.
| Car class | Width for 1 car (m) | Width for 2 cars (m) | Min. height (m) | Length (m) |
|---|---|---|---|---|
| Small class (A, B) | 2.5 | 5.5 | 2.3 | 5.0 |
| Middle class (C, D) | 2.7 | 6.0 | 2.4 | 5.5 |
| Business class (E, F) | 3.0 | 6.5 | 2.5 | 6.0 |
| SUVs | 3.2 | 7.0 | 2.7 | 6.0 |
Please note that the “2 car” width in the table already includes the required space between cars for exit. If you plan to pack the machines tightly (for example, only at night), you can reduce the overall dimensions, but this will reduce the convenience of daily use.
Foundation and location of supports
The reliability of the entire structure depends on the quality of the foundation. For carport for two cars Most often, a columnar foundation or bored piles are used. The location of the supports must strictly comply with the drawing, since a displacement of even 10 cm can disrupt the symmetry of the roof.
Support pillars are usually installed around the perimeter and, if necessary, in the center if the roof span exceeds 6 meters. The depth of the foundation depends on the type of soil and freezing depth in your region. In central Russia, it is recommended to deepen the supports by at least 80–100 cm.
☑️ Check before pouring the foundation
There must be waterproofing between the metal support and the concrete to prevent corrosion of the metal from capillary moisture. Often, pieces of roofing felt or special waterproofing mastics are used for this.
Organization of space and access roads
The size of the canopy itself is only half the story. It is equally important to properly organize access roads to it. The width of the driveway should allow entry under the canopy in one go, without complex maneuvers. The optimal width of the entrance group is at least 3 meters.
The covering of the area under the canopy also plays a role. If it is gravel or a grass grid, then the boundaries of parking spaces must be clearly marked (for example, with a curb or paving stones of a different color) so that drivers park symmetrically relative to the central pillar.
Use reflective elements or padding on center supports. This will help the driver better navigate when parking in the dark and will soften an accidental impact.
If the site has complex terrain, it may be necessary to organize a retaining wall or level the site, which also needs to be taken into account in the overall dimensions of the allocated area.
Regulatory requirements and approvals
The construction of a shed, like any other building, is regulated by building codes and regulations (SNiP) and local legislation. In Russia, according to SNiP 30-02-97 (as amended), a canopy is considered a non-permanent structure if it does not have a deep foundation and walls.
However, there are requirements for setbacks from the boundaries of the site. The canopy must be located no closer than 1 meter from the border of the neighboring property. It is also important to take into account fire gaps between buildings on your own and neighboring sites.
⚠️ Attention: Rules and regulations may change, and local administrations often have their own land use and development charters (PLZ). Before starting construction, be sure to check the plans with the architecture department or the MFC to avoid problems with legalization or complaints from neighbors.
If you plan to connect electricity for lighting or install a charging station for an electric vehicle, the project may require additional approval from the energy supply organization.
Frequently asked questions (FAQ)
Do I need to obtain permission to build a carport for two cars?
In most cases, if the shed does not have a permanent foundation and walls, it is considered a temporary structure and does not require a building permit. However, if the development area is large or the shed is adjacent to the house, notices may be required. Always check with your local authority.
What material is better to choose for the canopy frame?
The most popular and practical solution is a profile metal pipe. It is strong, durable and allows you to create structures of any size. Wood is also used, but requires regular treatment with antiseptics and is less durable in conditions of constant humidity.
Is it possible to make a carport for two cars collapsible?
Yes, there are modular canopy designs that can be dismantled. However, for reliability and resistance to wind loads, a stationary option with concrete supports is preferable. Collapsible options are often used as a temporary solution.
How to calculate the roof slope angle for a canopy?
The angle of inclination depends on the roofing material. For polycarbonate, 5-10 degrees is enough, for metal tiles - from 12 degrees, for slate - from 20-25 degrees. In snowy regions, it is better to make the angle steeper (30 degrees or more) to allow the snow to melt on its own.
Is it necessary to drain the canopy?
Yes, drainage organization is required. Water from the roof should not flow onto the foundation, walls of the house or onto paths where people may walk. It is recommended to use gutters and pipes to drain water into a storm drain or drainage well.
Correctly calculated dimensions of a carport for two cars are an investment in the safety of your property and the comfort of daily use. Don't skimp on inches of width and height.