I inspect a lot of detached garages in New Jersey. Some are older and some are newer, but most of them tell a story about how the property has been maintained. A detached garage is part of the home and buyers should know its true condition. Many people overlook these buildings and assume they are fine, but they can have problems that cost money to fix.
Here is how I look at a detached garage during a NJ home inspection and the common issues I find in New Jersey homes.
General Structure
The first thing I look at is the overall structure. I check the roof line to see if it is sagging. I look at the walls to see if they lean or bow. I also look for racking which is when a wall shifts out of square. Racking can happen from age, weak bracing, poor foundation support, or long term moisture.
Some garages have sloped or leaning walls which tells me the structure has moved. Inside I look at the wall framing for cracked rafters, missing bracing, and wood that has been weakened by moisture. When you see movement in the walls and the roof, you get a good idea of how the building has held up over time.
Roof and Weather Protection
Detached garages take a lot of weather and many of them are not maintained the same way as the house. I check the shingles, the flashing, and any signs of leaks inside. Staining on the roof sheathing is common in older garages. Missing shingles or damaged flashing can let water run down the walls and into the framing.
I also look at the gutters. Many detached garages have no gutters at all or they have gutters that are clogged or damaged. Missing or clogged gutters allow water to drop straight down the siding and onto the base of the wall. Over time this causes rot, water intrusion, and movement in the structure. It also adds moisture to the sill plates which can weaken them.
Foundation and Floor
Detached garages can sit on a full concrete slab, on blocks, or in some older cases right on the ground. I check for cracks, settlement, heaving, and areas where the slab is broken. Broken slabs are common and they usually come from frost movement, poor soil, or long term neglect.
If water drains toward the interior, that is another sign of settlement or slab movement. If the garage is on blocks with no proper footing, I look for sinking corners or openings that are out of level. All of this ties back to racking and leaning walls.
Walls, Siding, Trim, and Wood Damage
I check the siding and trim carefully. Detached garages usually have exposed wood at the lower parts of the walls. I often see rotted trim, deteriorated siding, peeling paint, and moldlike staining. These are signs of long term moisture.
Water damaged studs and sill plates are also common. When the lower framing sits in moisture, it weakens the structure and allows pests to enter. A soft or deteriorated sill plate is something I always note because it affects the strength of the building.
Garage Door and Operation
NJ Home inspectors check the main garage door for smooth operation. A racked or leaning structure will cause the garage door to bind or not close fully. Older heavy wooden doors can also stress the framing. If there is an automatic opener, I test the safety sensors and basic operation.
Electrical System
Electrical issues are very common in detached garages. Many of them were wired by homeowners. I look for open junction boxes, loose wiring, unprotected wiring, missing GFCI outlets, old receptacles, and incorrect grounding. Some garages have a small subpanel but it is not bonded or grounded correctly.
Extension cords used as permanent wiring are also a problem. I make note of anything that is unsafe or not installed to a reasonable standard.
Moisture, Ventilation, and Mold
Detached garages can trap moisture because they are not conditioned spaces. I look for moisture staining, moldlike growth, and musty odors. Many garages have no ventilation at all and stay damp year round. This leads to rot and weakened framing.
Long term moisture explains a lot of the structural problems I see such as racking, leaning walls, and damaged sill plates.
Pests
Detached garages often attract pests. I look for rodent droppings, termite tubes, carpenter ants, and wasp nests. Once pests get into the garage, they can move toward the house if the conditions are right.
Overall Neglect
Many detached garages show years of neglect. Paint peels, wood rots, gutters clog, the roof ages, and nothing gets maintained. When you see racking, sloped walls, broken slabs, damaged framing, and moisture, it usually points to long term deferred maintenance.
Why Detached Garage Inspections Matter
A detached garage may look simple but it can hide real issues. Repairs can be costly. A garage with structural movement, a weak roof, a broken slab, or electrical hazards can turn into a larger project than expected. I look at these buildings with the same care that I give the main home.
I inspect detached garages the same way I inspect any part of the property because the buyer deserves to know the true condition before closing. As a NJ home inspector I see many garages with problems that have been ignored for years.
Final Thoughts
Detached garages in New Jersey vary in age, design, and construction quality. Some are solid and some are barely holding together. My job is to look at the structure, the roof, the foundation, the gutters, the siding, the electrical, and the overall condition so the buyer understands what they are getting. When you see racking, sloped walls, moisture damage, broken slabs, missing or clogged gutters, and movement in the framing, the building is telling you something important.
I am John Martino, a NJ home inspector with more than twenty five years of experience and over six thousand inspections completed across New Jersey. I run LookSmart Home Inspections and I work for the buyer only. I do one inspection a day so I can slow down, look at everything the right way, and give people a report that is detailed and honest.
I use thermal imaging, moisture testing, drone photography, and a lot of common sense from doing this every day for a long time. My goal is simple. I want buyers to understand the house they are buying and to avoid surprises. You can read more about how I work at my website at https://looksmarthomeinspections.com.