A dispute between neighbors in Kew Gardens has become a real-life horror story — as a Queens man has decorated his yard with a Halloween-like monster mannequin that has left his next-door neighbors scared to enter their own home.

“It’s gotten to the part where I can’t sleep. My daughter has nightmares about the mannequin. The whole thing is a nightmare,” said Jennifer Feldman, who is so upset at neighbor Shlomo Klopfer, she gone to the police over his yard display.

Feldman said the trouble on 147th Street began 11 months ago, when she asked him to remove a sign on his fence that read “Dead End” because it “creeped” out her then 6-year-old daughter.

Klopfer, however, said he collects signs and he chose not to take it down.

“I love signs, man. I collect signs,” Klopfer told the Post.

Things escalated from there. Feldman alleges that whenever she called 311 to make a complaint, Klopfer, 62, added more signs. She even went to the cops and talked to officers who deal with community relations.

There are now more than a dozen signs that say “Private Property,” “No Trespassing,” and “Dead End” on a wrought iron fence separating the two 147th Street properties.

There is also the gruesome-looking monster figure, featuring a blood-splattered t-shirt topped by a Halloween mask with stringy grey hair and blue bulging eyes.

Klopfer’s wife, Ilana, said the couple is angry that Feldman never asked for a face-to-face sit down to settle the issue before going to the cops.

“You see a sign. Why won’t you come over and talk to your neighbor like a human being? You knock on the door. You ask nicely. ‘Is it possible to take the sign down?’ She never has,” she said.

For her part, Feldman says: “We just want peace. It’s not just us. He fought for decades with the woman next door. We would like an end to the harassment of our family.”

Feldman said she even approached Klopfer’s rabbi in good faith to act as a mediator but things did not get better.

Feldman also thinks her neighbor is harassing her because of her interfaith marriage, a charge that Klopfer denied.

“The only thing I can think of is I’m Jewish. My daughter and I go to temple. My husband’s Christian. I can’t help that.”

Police can’t force Klopfer to take down the display, since it is on private property and not a criminal offense.

Neighborhood Coordination Officers from the 108th Precinct are working with both parties to resolve the issue, the NYPD said.

Klopfer is a chaplain who owns a landscaping company called “S&K Tree Service.”

A neighbor who lives down the street said he is to blame and that he generally has beef with a bunch of people.

“Klopfer has been in disputes with two other people. I’ve never heard complaints about Feldman,” said the 39-year-old neighbor who requested anonymity.

“I don’t know how it started. But it’s getting way out of hand. The evil eye, the scary Halloween thing and all the cameras. I think it’s going too far,” he continued.