Garage Design That Works: Sizing, Layout and Storage Planning for Utah Custom Homes

People spend weeks choosing kitchen cabinets and about fifteen minutes on the garage. Then they park in it every day for the next thirty years. We have drafted custom plans in Cache Valley since 1997, and the garage conversation almost always comes too late. By the time someone realizes the bay is too shallow for a truck with the tailgate down, or there is no wall left for a workbench, the foundation is poured. Every dimension in a garage is a drafting decision. Here is what we have learned about getting those dimensions right the first time.

Key Takeaways

• A standard two car garage at 20 by 20 feet is tight for modern trucks and SUVs. Starting at 24 by 24 gives you room to actually open doors
• Depth matters more than width, and 24 feet of clear depth handles most full size pickups without folding the mirrors
• The third bay pays for itself in storage and workspace even if you never park a third vehicle in it
• EV charging, air compressor lines, and hot or cold water are cheap to rough in during framing and expensive to add later
• Garage placement on the plan affects the entry sequence, mudroom connection, and curb appeal of the entire house

How Big Should a Garage Actually Be?

The numbers most people start with come from a time when cars were smaller. Here are the dimensions we draw against today:

• Two car garage, minimum comfortable: 24 feet wide by 24 feet deep. That gives about 22 inches of clearance on each side of two midsize SUVs with room to walk between them
• Two car garage with a storage wall: 24 feet wide by 28 feet deep, which puts four feet of shelving behind the parked vehicles without crowding
• Three car garage: 32 to 36 feet wide by 24 to 28 feet deep. The third bay can hold a vehicle, a workshop, or seasonal storage, and it often does all three at different times of year
• Single car or golf cart bay: 12 to 14 feet wide by 22 feet deep, sometimes added to the side of a main garage for a specific vehicle or piece of equipment

In Cache Valley, a full size pickup runs about 20 feet bumper to wall. Add a foot for comfort, another foot for the step bumper you will eventually install, and you land at 22 feet of clear depth as the real minimum. We typically draw 24 to stay safe.

Check our room-by-room sizing guide for how the garage fits into the overall square footage picture.

Door Placement and Bay Layout

Front facing versus side entry

Front facing garage doors are the simplest and cheapest to build. The driveway runs straight in. The downside is curb appeal: a house with two or three garage doors staring at the street can look more like a parking structure than a home. Side entry garages tuck the doors around a corner, which cleans up the front elevation but adds driveway length and turning radius. We draw side entry when the lot allows it and the client wants a stronger street presence.

Tandem bays

A tandem bay is two cars deep on a single door. It works well for seasonal vehicles, boats, or a workshop behind the daily driver. The catch is that whatever is in the back only comes out after you move whatever is in the front. We use tandems on narrow lots where width is limited but depth is available.

The third bay question

Almost every client who builds a third bay is glad they did. Almost nobody who skips it feels the same. At roughly $40 to $60 per square foot of additional garage space, a 12 by 24 foot third bay costs between $11,500 and $17,300 to build. That buys a dedicated workshop, a place for the chest freezer and seasonal gear, or parking for the vehicle that currently sits in the driveway collecting snow. If the budget is tight, consider framing for a future third bay with a temporary wall. The rough opening costs very little, and finishing it later is far cheaper than adding on.

See our full build cost breakdown for how garage square footage fits into the overall construction budget.

Storage Planning That Belongs on the Floor Plan

Storage is the thing garages are worst at by default, because the framing goes up and whatever space is left becomes “storage.” Drawing it intentionally changes everything.

• Workbench wall: plan a six to eight foot run of uninterrupted wall at counter height, with outlets above and a window for light. This wall needs to be identified on the plan so no doors, panels, or utility runs land on it
• Overhead storage: attic trusses or a raised platform above the garage doors can hold hundreds of pounds of seasonal items. The truss design has to account for this load, which means it goes on the plan before the truss package is ordered
• Yard and sports equipment: a four foot deep zone along one wall with hooks, rails, and floor space for bikes, strollers, and mowers. This zone competes with parking width, which is why the bay dimensions above build in the clearance for it
• Seasonal tire and gear storage: in Utah, nearly every household swaps tires or stores ski gear for several months. A simple 4 by 8 foot alcove or bump out handles it without taking floor space from the bays

If you are also considering a bonus room above the garage, the truss and ceiling height decisions for storage and living space above need to happen at the same time.

Utility Rough-Ins to Plan Now

These items cost almost nothing during framing and a great deal after drywall:

• EV charging: run a 240 volt, 50 amp circuit to the wall where the charge port will sit. Even if you do not own an electric vehicle today, the next owner of this house will, and the circuit adds resale value now
• Air compressor line: a dedicated outlet and a small mounting wall for a compressor saves running extension cords across the floor
• Hot and cold water: a utility sink in the garage is one of those things nobody thinks about and everybody uses. Plumbing is cheapest when the garage shares a wall with a kitchen or laundry wet wall
• Floor drain: useful for washing vehicles, melting snow off equipment, and general cleanup. It needs a slope in the slab, which means it has to be on the plan before the concrete is poured
• Insulation and climate control: even a partially insulated garage with a mini split or gas heater makes winter mornings in Cache Valley far more comfortable. The insulation decision affects wall thickness and stud spacing

Garage Placement on the House Plan

Where the garage sits affects more than parking. It shapes the entry sequence, the mudroom connection, and how the house looks from the street.

Attached, side entry

The garage connects to the house through a mudroom or hallway, with doors facing the side yard. Strongest curb appeal, cleanest front elevation. Requires a wider lot and a longer driveway.

Attached, front entry

The most common arrangement in Cache Valley subdivisions. Garage doors face the street. Cost effective and efficient on standard lots. We offset the garage slightly or add a front porch to keep the doors from dominating the facade.

Detached or breezeway connected

The garage sits apart from the house, sometimes connected by a covered walkway. This keeps noise and fumes out of the living space entirely and works well on larger lots or rural properties. The walk from car to kitchen in January is the honest trade-off.

The mudroom connection

However the garage attaches, the door from the garage should open into a mudroom or drop zone, not directly into the kitchen or living room. That transition space holds coats, boots, backpacks, and the mess that comes with Utah’s seasons. It is one of the most requested features we draw, and it has to be planned at the garage layout stage.

Designing a Garage for Cache Valley Weather

Winter here is real, and the garage takes the first hit. A few details that matter:

• Floor slope: the slab should slope slightly toward the door or a drain so snowmelt runs out rather than pooling under the vehicles
• Ceiling height: nine feet gives clearance for a roof rack and room for overhead storage. Ten feet is better if you are running attic trusses above
• Insulation: even R-13 in the walls and an insulated garage door make a noticeable difference when it is ten below outside. If the garage shares a wall with living space, insulation is code required
• Lighting: in December the sun is down before most people get home. Bright LED fixtures on a motion sensor make the garage feel safe and functional instead of dark and cold

Frequently Asked Questions

What is a good size for a two car garage?

24 by 24 feet is a comfortable starting point for two midsize vehicles with room to open doors and walk between them. If you drive full size trucks, go to 24 by 26 or 24 by 28 for the depth.

Is a third garage bay worth the cost?

In almost every case, yes. A 12 by 24 foot third bay costs roughly $11,500 to $17,300 to build and provides dedicated space for a workshop, storage, or a third vehicle. Clients who skip it frequently wish they had not.

Should I rough in EV charging even if I do not own an electric vehicle?

Yes. A 240 volt, 50 amp circuit costs a few hundred dollars during construction and thousands to retrofit later. It also adds resale value whether you use it or not.

How does the garage affect home design cost?

Our drafting is priced at $0.20 per square foot for attached garages, so a 576 square foot two car garage adds about $115 to the plan fee. The larger effect is on construction cost, which is why getting the dimensions right on paper saves money at the job site.

Can I add a garage bay later?

You can, but it is significantly more expensive than building it now. If budget is the concern, consider framing a rough opening for a future bay with a temporary wall. The structural work costs very little during initial construction and saves thousands later.

Park the Truck, Then Plan the House

That sounds backward, but it is not. The garage is where you start and end every day, and its dimensions ripple through the rest of the plan. Get the bays wide enough, the depth long enough, the storage walls identified, and the utility rough-ins placed before anything else is drawn. That is fifteen minutes of conversation at the drafting table that saves years of wishing you had done it differently.

Poulsen Home Design has drafted custom plans for Cache Valley families since 1997. Mont and Mary-Ellen Poulsen spent years as general contractors before moving to design and drafting full time, so every garage we draw is measured against how it will actually get built and how it will actually get used.

Bring us your vehicle list and your lot. Call Poulsen Home Design at (435) 512-5852 or visit poulsenhomedesign.com to start the conversation, and we will make sure the garage works as hard as you need it to.