Maximum Detached Garage Size in Salt Lake City: Maxing Out Your Lot

In Salt Lake City, your maximum detached garage size is limited by both rear-yard coverage and a hard square-foot cap, which means most single-family homes top out around 720 sq ft.

You also need to account for setbacks, fire-rated wall rules, and roof eave limits before you finalize the layout.

Why Garage Size Matters on Tight Salt Lake City Lots

When you own a home in a premium, historic, or high-density Salt Lake City neighborhood—like East Yale Avenue, Sugar House, or the Avenues—space is the ultimate luxury. If you want to maximize your footprint, the goal is simple: build the largest structure possible to support your cars, workshop tools, or future projects.

But you can’t build from property line to property line. Salt Lake City limits how much of your backyard can be developed, and those limits shape the size, placement, and roof design of your garage. If your mindset is “the larger the better,” you need to understand the city’s rules before you clear ground.

Rule 1: Backyard Coverage and Square Foot Limits

The biggest constraint on a detached garage is not one single dimension. It’s a combination of rear-yard coverage and overall square footage.

In Salt Lake City’s main single-family residential zones, detached garages and accessory structures are limited to the following:

• Most single-family homes: up to 720 sq ft
• Two-family properties: up to 1,000 sq ft
• SR-1A zoning: up to 480 sq ft

That square-foot limit still has to fit within the rear-yard coverage rules for your lot.

What this means for your garage:
Even if your lot feels large, your final garage size is controlled by both the shape of the rear yard and the city’s maximum square footage cap.

Rule 2: Side and Rear Setbacks

Once you know how much garage you can build, the next question is where it can sit on the lot. Salt Lake City allows detached garages to be placed as close as 1 foot from the side and rear property lines, but that close placement triggers fire safety rules.

If any part of your garage wall is less than 5 feet from a property line, that wall needs a 1-hour fire-resistance rating. That usually means using 5/8-inch Type X drywall on the wall assembly.

Window and door openings are also restricted:

• If the wall is closer than 3 feet to the property line, no windows or doors are allowed on that side.
• If the wall is between 3 and 5 feet away, window openings are limited to 25% of the wall surface area.

What this means for your garage:
If you want more natural light or easier access near the side of the garage, you may need to step the structure farther back from the property line.

Rule 3: Roof Eaves and Overhangs

Homeowners often plan the wall footprint but forget about the roof. In Salt Lake City, roof eaves matter because they cannot cross over a neighbor’s property line.

The allowed overhang depends on how close your wall is to the boundary:

• If the wall is 2 to 4 feet from the property line, the eave overhang is limited to 4 inches.
• If the wall is 5 feet or more from the property line, you can usually have up to a 36-inch overhang.

If the underside of the eave falls within the fire buffer zone, it still needs fire-resistive finishing.

What this means for your garage:
A closer wall placement means less roof overhang, which can affect both the look and the weather protection of the structure.

Navigating Strict Local Overlays: The Yalecrest Example

If your lot is in a historic or protected neighborhood—such as the Yalecrest Overlay District—local rules add a fourth layer of compliance.

In Yalecrest:

• The city limits pitched roofs on detached accessory buildings to 15 feet to the midpoint of the roof pitch, compared to the standard citywide limit of 17 feet to the absolute peak.

This rule prevents large “box” garages from dominating the historic streetscape. You must carefully balance wall heights and roof slopes to maximize storage capacity without breaking the neighborhood cap.

What this means for your garage:
In Yalecrest, you can’t just build as tall as you want. Roof height and slope are more restricted than in other parts of Salt Lake City.

Planning a Garage That Fits Your Lot

Maxing out a tight residential lot requires a careful, detail-oriented approach to local codes. Guessing at your parcel boundaries or drafting a footprint without checking your zone’s yard coverage limits can stop a premium project before the concrete is even poured.

Dave Johnson Construction handles the full garage build from start to finish, including framing, structural execution, and custom finish work. We plan every project with zoning constraints in mind so your garage is designed to make the best use of your lot while staying fully code-compliant.

Common Questions About Maximum Detached Garage Size in Salt Lake City