Garages in Southeast Michigan Homes: The Overlooked Structure Inspectors Don't Skip

When buyers walk through a home in Metro Detroit, the garage often gets a quick glance compared to the kitchen or basement. But garages are one of the most commonly flagged areas on a home inspection report, especially in older neighborhoods across Wayne, Oakland, and Macomb counties where detached garages and additions were built decades ago with far less oversight than the main house.

Whether it's a detached single-car garage behind a 1940s Detroit bungalow or an attached two-car garage in a newer Oakland County subdivision, garages take a beating from Michigan's freeze-thaw cycles, road salt, and decades of use. Here's what inspectors actually look for and why it matters to buyers, sellers, and owners.

Structural Issues Are Common in Older Detached Garages

Many older Southeast Michigan homes have detached garages built on shallow or minimal foundations, sometimes little more than a slab poured directly on grade. Over time, freeze-thaw cycles cause these foundations to heave, crack, and settle unevenly. Common findings include:

• Cracked or sunken slabs, often sloping toward the structure instead of away from it
• Leaning walls or separated framing where the garage has shifted over time
• Rotted sill plates from years of moisture wicking up through the slab
• Sagging rooflines, especially on older gable or flat-roofed detached garages

None of this is unusual for a garage of this age, but it's worth understanding the difference between cosmetic wear and a structural problem that will need attention.

Fire Separation Between Garage and House

For attached garages, one of the most important things an inspector checks is the fire-rated separation between the garage and living space. This typically includes the wall and ceiling assembly shared with the house, as well as the door leading into the home. Homeowners often unknowingly compromise this separation by cutting openings for wiring, adding pet doors, or swapping in a standard interior door instead of a fire-rated one. It's a detail that's easy to overlook but plays a real role in household safety.

Automatic Garage Door Openers and Safety Features

Automatic openers are inspected for proper function, including the auto-reverse safety feature that stops and reverses the door if it senses an obstruction. Inspectors also check the photo-eye sensors near the floor, which are commonly found disconnected, misaligned, or bypassed entirely. In homes with small children or pets, a properly functioning safety reversal system isn't optional.

Electrical and Roofing Concerns

Detached garages are frequently where inspectors find outdated or unsafe wiring, especially in structures that predate GFCI requirements or were wired by previous owners rather than licensed electricians. Roofing on both attached and detached garages is checked separately from the main house roof, since garages are often re-roofed less frequently and can show more advanced wear.

What This Means for Buyers and Sellers

A garage in rough shape rarely kills a deal, but it's a common negotiation point once buyers see it documented in writing. Sellers who address obvious garage issues, like a disconnected safety sensor or an unrated interior door, before listing can avoid last-minute surprises during the inspection period.

Whether you're buying, selling, or just maintaining a home in Metro Detroit, the garage deserves the same attention as the rest of the property. It's one of the easier areas to overlook, and one of the easier ones to get right.

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