7 Alarming Signs Your House Has Been Marked by Burglars

Every 13 seconds, a burglary happens in the U.S. — and your home could be next. But burglars don't just break in randomly. Often, they leave behind subtle — and sometimes bizarre — signs that a house is being watched. Here are seven to watch for and how to stay one step ahead.

1. Unfamiliar Cars or People Hanging Around

A car parked oddly near your home or a stranger walking the block repeatedly could be more than a coincidence. They may be watching your comings and goings, checking for patterns to know when you aren't home.

Take note of license plates, time, and descriptions — then report suspicious behavior to the police.

2. Flyers or Stickers on Your Door

A simple flier stuck between your doorframe could be a low-tech way to see if anyone is home. If it stays there for days, burglars assume the house is vacant.

Remove any materials right away and ask a neighbor to grab your mail if you're away.

3. Strangers Knocking With Weird Excuses

Asking to use the bathroom or get a glass of water might be a ruse. They're often checking whether you're home and scoping out the inside of your house if you let them in.

Stay polite but firm. Offer to call for help — not open the door.

4. Odd Symbols or Chalk Marks

Look for symbols near your mailbox, sidewalk, or fence. These may be code for burglars — like an "X" for "good target" or a circle for "not worth it."

If you spot any, photograph them and report them to local law enforcement.

5. Someone Taking Photos of Your Home

That person pretending to admire the architecture? They might be casing your property, taking note of security cameras, access points, or expensive items in view.

Document and report any such behavior.

6. Mysterious 'Accidents' or Vandalism

Broken lights, flipped welcome mats, or even stolen packages could be more than bad luck. Thieves may be testing how quickly you react — and whether your home is worth the risk.

Report any stolen packages and fix exterior problems immediately upon detecting them.

7. Hang-Up Calls or Unannounced Visitors

Multiple hang-up calls to your landline or "service workers" showing up without notice can be red flags. Burglars might be checking to see if you're home or trying to talk their way inside.

What Should You Do?

If any of these signs seem familiar, take it seriously. Record details, alert neighbors, and contact the police if needed. Keep lights on a timer, lock all doors and windows, and don't post travel plans online. In other words, stay alert, stay safe, and trust your gut.

References: 10 Signs Robbers Have Marked or Cased Your Home | 10 Signs Your House is Being Watched by Robbers | How to Tell if Your House Is Being Targeted (And How to Protect It) | 9 Signs Your Home Is Being Cased