You can usually tell a house is vacant within a few seconds of walking past it. The signs aren’t dramatic — they’re small things that have stopped happening. The grass that didn’t get cut. The mail that didn’t get collected. The light that hasn’t been turned on in months. Vacancy is mostly an absence of motion.
If you’ve ever wondered how to tell whether a quiet-looking home is actually unoccupied, here are the signals that matter most — all of which you can observe from the sidewalk, with no risk to yourself and no contact with anyone inside.
The five visible signs
1. Mail and packages piling up
This is the single most reliable sign of long-term vacancy. Mail accumulates fast — a week of unattended delivery looks like the mailbox is overflowing or the front porch is collecting flyers, menus, and small packages. If you see a house where the mail hasn’t been touched in what looks like weeks, it has probably been empty for some time.
2. Severe overgrowth
Grass past a foot tall, shrubs spilling onto the sidewalk, vines climbing the structure, trees that have grown into the gutter line. Lawn neglect happens fast in growing seasons, so a single missed mowing isn’t a vacancy signal. But several months of neglect is unmistakable. Look especially at the foundation line — overgrowth right against the house is usually a sign no one has been near it.
3. Boards, plywood, or covered windows
Property owners or banks board up houses to prevent damage or trespass. Plywood over windows, particularly newer-looking plywood, is a clear sign the house is not occupied and that someone has formally acknowledged it. Sometimes only certain windows are boarded — often after a break-in or storm damage. That partial pattern is just as informative.
4. Notices posted on the door
City inspectors, code-enforcement officers, and utility companies leave printed notices when something has gone wrong. A bright orange or yellow notice taped to a front door or affixed to a window is a strong signal that the property is being officially monitored. You do not need to read the notice. Its presence is the signal.
5. The “no one has touched this” details
These are the small things that take longer to notice but make the most accurate picture:
- Driveway with cracks growing through it, moss in the seams, or dirt that hasn’t been disturbed by tires
- Curtains closed in the same position for months
- Outdoor furniture untouched, dirty, weathered
- Holiday decorations from a season that has long passed
- Trash bins not put out on collection day, week after week
- Light fixtures still on during the day (or never on at night)
What doesn’t count
A few things that look like vacancy signals but usually aren’t:
- A closed garage and quiet driveway during the workday. The owners may simply be at work.
- A modest house in a fancy neighborhood. Modest doesn’t mean unattended.
- A “for sale” sign. The house may be listed but still occupied.
If you’re not sure
Submit it anyway. Vacancy is something we verify on our end with title records, tax data, and utility flags. Your job is to notice. Ours is to confirm. We would rather review a “maybe” than miss a property that has been sitting quietly for months because everyone walked past assuming someone else had noticed.
And a reminder, because it matters: only observe from public areas. Do not enter the property. Do not knock. Do not try to confirm vacancy by looking through windows up close. The signs you can see from the sidewalk are enough.
Going deeper
The Quiet House Field Guide
A seven-day email course on safely reading property condition from public areas — what to look for, what to ignore, and what to record. Plain English. No hype.
Noticed a property worth a closer look?