FALLBROOK, Calif. -- Million-dollar homes are being turned into nightclubs by local teenagers. It's a trend in the North County and the homeowners have no idea, until sheriff's deputies arrive to break them up.

10News reporter Juliette Vara explained how the teens are getting into homes. “First,” she reported Tuesday, “they simply spotted homes with for-sale signs. Then, they called the listing agent to make sure the home was vacant.”

In two recent cases, Vara reported, teens found an open bedroom window to gain access.

Photos found online show one party being held inside a $1.2 million Fallbrook home in a gated community.

In them, hundreds of teenagers and young adults can be seen with beer and hard liquor, dancing to music played by a disc jockey.

“There were lots of kids and lots of noise,” said neighbor, Matt Premo.

What Premo heard, without knowing it, was the noise from a two-day rave held over the July 4th weekend.

According to a real estate agent who sent 10News the pictures, the party-goers ripped out some wiring.

That enabled them to open the home's front gate, giving hundreds of partiers a way in.

"I thought it was the owners’ kids having a party," said Premo.

But that wasn't the case. The owners, and their real estate agent, had no idea until police broke up the party.

"Raves are not nice get-togethers, it's a time to have fun," said real estate agent, Steve Vance, a broker with Coldwell-Banker.

He said the same thing happened to his client's Fallbrook home on July 18th.

"People had been in the showers, bathrooms, in every room in the house," Vance told 10News.

He took photos the next day.

He said furniture was pushed into other rooms to make room for a dance floor.

A painting was destroyed by markers and cups of beer were left behind. A sticky ooze was caked on the floor, Vance said.

"It was a combination of alcohol and vomit. It reeked, it just reeked," Vance recalled.

The damage to his client's home was about $2,000.

The damage to the other home: about $8,000.

“Thankfully,” Vance said, “a neighbor called the police within about two hours, before more damage could be done.”

Vance said hundreds of balloons were also found in the house.

He believes party-goers filled them with a gas, possibly Nitrous Oxide, and inhaled it to get high.

In both cases, after sheriff’s deputies arrived, no one was arrested.

10News has not yet received a call back from the detective assigned to the case.

Authorities in San Marcos are also reportedly investigating similar incidents, Vance said.