Police officers responding to an alarm at a Brooklyn home Friday found the front door and a kitchen window open — and $700,000 in cash and more than 10 pounds of marijuana inside, the NYPD said.

Officers arrested a woman in the Blake Avenue home after they answered the security alarm at 11:30 a.m., police said.

Police then executed a search warrant, recovering the cash, 10.4 pounds of marijuana, a scale, a loaded .38 handgun and two forged emergency parking placards from the New York City Sheriff’s Office and the Uniformed Firefighter’s Association, the NYPD said.

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Chanisha William, 31, is charged with criminal possession of marijuana and criminal possession of a weapon, possession of a forged instrument, drug paraphernalia and violation of local law.

Arraignment information was not immediately available Saturday evening.