Side-Entry Garage Dimensions: How Wide Should Your Garage and Driveway Really Be?

A side-entry garage can solve a lot of layout problems, but it also creates one important question: how much space do you need to turn into the garage without making every arrival and departure feel like a three-point maneuver?

The answer depends on more than the garage itself. Your vehicle size, garage width, door placement, driveway approach, turning space, and available side yard all work together. Getting the side entry garage dimensions right from the beginning can make the difference between a layout that feels effortless and one that becomes frustrating every day.

What Are Side-Entry Garage Dimensions?

Side-entry garage dimensions refer to the building’s width, depth, height, and the space needed in front of the side-facing garage doors for vehicles to approach and turn.

Unlike an end-entry garage, where a vehicle generally drives straight toward the door, a side-entry layout requires the driveway to approach from the side and give the vehicle enough room to make the turn.

That means you need to think about two measurements separately:

• Garage dimensions: The interior space needed for vehicles, storage, and workspace.
• Driveway dimensions: The exterior space needed to approach, turn, align with the door, and exit comfortably.

A 24×30 garage, for example, may provide enough interior space for two vehicles, but that does not automatically mean the surrounding driveway is large enough for an easy side-entry approach.

How Wide Should a Side-Entry Garage Be?

The required width depends largely on how many vehicles you want to park and what types of vehicles they are. Viking’s current side-entry sizing guide recommends about 10 feet per bay as a functional starting point for compact vehicles and 12 to 14 feet per bay for larger trucks and SUVs.

Here are practical examples:

Garage Use	Suggested Width	Suggested Depth
1 vehicle	14–18 ft.	24–30 ft.
2 cars or crossovers	20 ft.	30 ft.
2 trucks or SUVs	24 ft.	30 ft.
3 mixed vehicles	30 ft.	30 ft.
3 trucks or larger vehicles	36 ft.	30 ft.
2 vehicles + workshop	30 ft.	40 ft.
RV + 2 vehicles	40 ft.	50 ft.

These are starting points rather than universal requirements. A compact car needs less room than a full-size pickup, and a garage that includes a workshop needs additional depth beyond what is required for parking.

For a broader look at how vehicle dimensions affect building size, the metal garage size guide provides measurements for cars, SUVs, pickups, RVs, and other vehicles.

How Much Driveway Space Does a Side-Entry Garage Need?

This is where many garage plans go wrong. People carefully calculate the building footprint but overlook the space outside the doors. A side-entry driveway needs enough room for the vehicle to move across the side yard, turn toward the garage, straighten out, and leave without repeatedly backing up.

Allowing roughly 20 to 25 feet of side approach clearance perpendicular to the door openings is a practical starting point. However, the actual requirement depends on the vehicle and approach angle.

For example, imagine a 24×30 side-entry garage with two 12-foot bays. If the driveway runs directly along the side of the building and the vehicle must make a relatively sharp turn into the doors, 20 feet may feel considerably tighter than it would with a gradual approach.

For a large pickup, SUV, or trailer, additional maneuvering space is worth considering.

A Simple Driveway Planning Example

Suppose you have:

• A 24×30 garage
• Two 12-foot parking bays
• A full-size pickup
• Side-facing garage doors
• A driveway approaching from the side

The building itself provides the interior width, but the vehicle still needs exterior turning space. If the approach area is narrow, the driver may need several corrections before entering.

Increasing the approach area can make the same 24×30 garage significantly easier to use without changing the building at all.

What Size Side-Entry Garage Is Best for Two Vehicles?

For two vehicles, 20×30 feet is a practical starting point when the vehicles are sedans or crossovers. It provides 600 square feet and gives you a longer footprint than a basic 20×20 garage.

If you regularly park full-size trucks or SUVs, moving to 24×30 feet provides more width. Each vehicle gets approximately 12 feet of building width, giving you more usable clearance.

The extra width becomes particularly useful in a side-entry configuration because the doors are positioned along the long wall. You want enough room to open doors, move between vehicles, and access storage without making the entire building feel congested.

For additional two-car sizing guidance, see the two-car garage guide, which covers common widths and lengths and explains why larger vehicles often require a larger footprint.

What Size Side-Entry Garage Is Best for Three Vehicles?

Three-car layouts require considerably more width because the vehicles need independent parking areas.

A 30×30 garage provides 900 square feet and can work well for three smaller or mixed vehicles. If you are parking three larger trucks or SUVs, a 36×30 garage gives each vehicle approximately 12 feet of width.

The difference between these two sizes is 180 square feet, but the practical difference can be even more important because those additional feet are distributed across the parking bays.

For example:

• 30×30: about 10 feet per bay for three vehicles
• 36×30: about 12 feet per bay for three vehicles

If you are considering a larger three-car layout, the 3-car garage dimensions guide provides additional examples, including 30×24, 36×24, 36×28, and 40×30 configurations.

How Deep Should a Side-Entry Garage Be?

Width gets most of the attention, but depth matters just as much when deciding on side entry garage dimensions.

The building should be deep enough to accommodate the longest vehicle while leaving room for walking and anything stored along the walls. We recommend matching or exceeding the longest vehicle length and adding roughly 3 to 5 feet for walking space and front-wall storage.

For example:

• A 20-foot-long pickup should not be planned for a garage that is exactly 20 feet deep.
• A 24×30 garage gives a 30-foot depth, creating useful space around longer vehicles.
• A 30×40 garage provides enough additional depth for vehicles plus a more substantial workshop or storage area.

If you want shelving, a workbench, lawn equipment, or tools at the front or rear, account for that space before settling on the building length.

Where Should the Side Garage Doors Go?

Door placement can change how usable the entire property feels. With a side-entry design, the garage doors are installed along the long wall rather than the front or back wall. This can keep the front approach cleaner while allowing vehicles to enter from a side driveway.

For multiple vehicles, consider whether each bay should have its own door or whether a wider opening makes more sense.

You should also consider:

• Distance between doors
• Distance from the building corners
• Walk-in door placement
• Window locations
• Storage areas inside
• Direction of the driveway approach

A poorly positioned door can force vehicles into awkward angles even when the building itself is large enough.

Should the Driveway Be Straight or Curved?

A straight side approach is usually easier to plan because the vehicle has a predictable path toward the garage. A curved driveway can work well on larger properties, but the curve needs enough radius for the vehicles you intend to park.

This becomes especially important for:

• Full-size pickups
• Dually trucks
• Trailers
• RVs
• Boats
• Long-wheelbase vehicles

A driveway that looks spacious from above may still feel tight when a long vehicle needs to make the turn.

If possible, sketch the vehicle path before construction. Draw the garage, driveway, property boundaries, and the approximate turning path. This simple exercise can reveal problems before they become expensive changes.

Side-Entry Garage Dimensions for RVs and Larger Vehicles

RVs and trailers require a different approach because their length and turning radius can be substantially greater than those of passenger vehicles.

For an RV combined with additional vehicle parking, Viking’s current guide lists 40×50 feet as a starting configuration, with approximately 14 to 16 feet of width allocated for an RV bay.

Height also matters. A standard vehicle garage may work with a 9- or 10-foot eave, while taller vehicles can require 12 feet or more. RVs and other tall equipment may need even greater clearance.

The same principle applies outside the building. A driveway that works for a pickup may not provide enough turning space for a trailer.

A Few Side-Entry Layouts to Consider

Different properties call for different solutions, so it helps to think in terms of the entire layout rather than a single building size.

24×30: Good starting point for two trucks or SUVs, with room for moderate storage.

30×30: Useful for three vehicles or two vehicles with a dedicated workspace.

30×40: Better when you want two-car parking plus a meaningful workshop or storage area.

36×30: A practical choice for three larger vehicles when additional width is more important than extra depth.

40×50: Suitable for a larger mixed-use layout involving an RV and additional vehicles.

The right choice depends on what needs to move through the building and how much exterior maneuvering space your property allows.

Long Story Short:

The best side entry garage dimensions are not determined by the garage alone. You need to look at the building, vehicle sizes, door placement, driveway approach, turning area, and future use as one connected layout.

A 20×30 garage may work well for two smaller vehicles, while a 24×30 can make more sense for two trucks or SUVs. For three vehicles, 30×30 is a useful starting point, while 36×30 provides more breathing room for larger vehicles.

Most importantly, do not use every available foot for the building and leave the driveway as an afterthought. A well-sized side-entry garage with inadequate approach space can be harder to use than a slightly smaller building with a properly planned driveway.