Garages in Southeast Michigan Homes: What Inspectors Check in Attached and Detached Structures

Garages get overlooked in a lot of home buying conversations. Buyers focus on the roof, the furnace, the basement — and the garage becomes an afterthought until move-in day, when the door won't close right or water is pooling along the slab. Across Wayne, Oakland, and Macomb counties, garages come in every configuration imaginable: attached two-car garages built alongside 1950s ranches, detached single-car structures original to pre-war bungalows, and newer oversized garages added decades after the house itself. Each type brings its own set of issues.

Attached Garages: The Firewall Question

When a garage shares a wall or ceiling with living space, separation between the two matters. Inspectors look at the condition of the wall and ceiling assembly separating the garage from the house, checking for gaps, damage, or areas where drywall has been removed and never properly replaced. This separation exists to slow the spread of fire and keep exhaust fumes from migrating into living areas — a real concern in older homes where a laundry room or bonus space sits directly above the garage.

Common Attached Garage Findings

• Man doors without self-closing hardware between the garage and house interior
• Penetrations in the shared wall or ceiling from wiring, plumbing, or old renovations
• Sloped or cracked slabs that direct water toward the house instead of away from it
• Exhaust or carbon monoxide concerns if the garage is used to store running vehicles or equipment near shared walls

Detached Garages: Structure and Settling

Metro Detroit's detached garages are often as old as the house, and many were built with less attention to footings and drainage than the main structure. Over decades of freeze-thaw cycles, it's common to find leaning walls, separated corners, and roof lines that have shifted noticeably. Inspectors check whether the structure is still plumb, whether the roof deck has soft spots, and whether the foundation shows signs of ongoing movement rather than old, stable settling.

What Inspectors Look For in Detached Structures

• Foundation type — many older detached garages sit on shallow footings or even bare slabs
• Roof condition, since these structures are frequently the last thing owners get around to maintaining
• Electrical wiring run from the house, often outdated or improperly protected from moisture
• Overhead doors and openers, checking for safety reversal features and worn springs or cables

Garage Doors and Openers

Automatic garage door openers manufactured without modern safety sensors are still in service throughout the region. Inspectors test that the door reverses properly when it meets resistance and that photo-eye sensors are present and functioning — a simple check that matters most for households with kids or pets.

Why It's Worth a Closer Look

A garage might not be a dealbreaker in a purchase, but structural movement, fire separation gaps, or electrical shortcuts can be expensive to correct later and are easy to miss during a casual walkthrough. Whether it's an attached two-car garage or a leaning one-car structure out back, a full inspection gives buyers and owners a clear picture of what they're actually taking on — not just what's parked inside it.

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