Home invasions can cost homeowners more than just theirvaluables, but their piece of mind and sense of security, too.

And according to a new report, experiencing such a traumaticevent is much more likely than many may think.

The newly released 2017 Ooma.com home securityreport found that 63% of American homes are at high risk ofburglary.

Related: Here's the new high-tech way to catch aburglar

The data scientists at Ooma.com surveyed 1,000 Americans abouthow they protect their homes when they're away, and also found that16% of Americans say they've experienced a burglary. These victimsidentified the factors they say they believe contributed to orcaused their home invasion.

Related: 12 home theft prevention tips for travelinghomeowners

Here are the top five factors putting American homes atrisk:

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No. 5: Living in an apartmentbuilding

Of the 16% of Americans who say they have experienced aburglary, 7% say living in an apartment building put them atgreater risk. Apartments can be more accessible targets for thievesfor a few reasons, mainly due to easier access.

Related: 5 reasons why renters needinsurance 

Fire escapes or sliding side doors can provide thieves with easyentry if not secured properly. There's also an anonymity factor,where burglars could potentially walk through an apartment complexappearing to others as a resident. The significantly smaller sizeof an apartment compared to a home also makes it easier for thievesto cover more ground in a shorter amount of time.

In addition, renters experience a burglary at nearly double therate of homeowners, according to the Bureau of Justice Statistics.

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No. 4: An open window 

Eight percent (8%) of burglary victims say an open window wasthe cause of their attack. Ooma.com's home security report foundthat 60% of Americans leave their windows open when they're away,putting the majority at risk. Of that 60%, approximately 15% saythey simply forget to close their windows, and another 15% say theyleave their windows open in warmer weather.

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No. 3: An unlocked door

Forty-two percent (42%) of Americans say they leave their doorsunlocked when they are away from home. Some say they plan to returnquickly (14%), and others say they just forgot (12%). As the numberthree factor, 14% of burglary victims attribute their robbery to anunlocked door. Supporting this claim, data collected from a2012 FBI Crime Report says 34% of burglars enterthrough the front door.

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No. 2: No home security system

As the number two factor, 16% of burglary victims say not havinga security system put them at risk. According to Oooma.com, only37% of Americans own a security system, putting 6 in 10 U.S. homesat risk. According to the FBI, homes without security systemsare up to 300% more likely to be broken into.

As an incentive, some insurance agencies offer discounts up to 20%on homes with a security system installed. 

Related: 6 home safety and tech devices for2017

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No. 1: Neighborhood orsurroundings 

Nearly 24% of Americans burglarized say their neighborhood orsurroundings put them at greater risk. Besides taking basic safetyprecautions like locking doors and windows, there are other ways tomake your home less of a target.

Experts suggest adding more lights in and around your propertyto deter burglars. Keeping the lights on inside will make it harderto tell if anyone is home, and more exterior lights will make iteasier for would-be thieves to be seen.

Related: 5 strategies to reduce propertyvandalism