PICTURED: Popular Douglas Elliman broker, 56, identified as man who jumped to his death from Upper East Side luxury apartment building

A respected New York City real estate agent jumped to his death from his Upper East Side apartment building while in the middle of selling an heiress' home.

Tom Cooper, 56, died when he landed on the sidewalk in front of 18 East 67th Street, near Madison Avenue, just before 7:30 a.m. Tuesday.

He left a suicide note, police said, before jumping in front of shocked onlookers who thought the impact was a bag of laundry until they saw the body.

The Douglas Elliman agent was selling the $3.7 million copy owned by billionaire Oracle founder Larry Ellison's daughter, filmmaker Meghan Ellison, when he died.

He died when he landed on the sidewalk in front of 18 East 67th Street, near Madison Avenue, just before 7:30 a.m. Tuesday.

Cooper's last social media post was of him standing next to a Christmas tree in the lobby of the historic building that houses the apartment and two other apartments he sold.

“The beautiful lobby of the police building at 240 Center St!” he wrote on Friday.

Cooper also recently helped sell a six-story, 9,000-square-foot townhouse at 24 West 10th Street for $18.5 million.

“Absolutely thrilled for my wonderful buyers who can now call this stately brownstone in Greenwich Village their home. Truly a beautiful home, and part of New York City history!' he wrote on Instagram.

Cooper's sister is on her way to New York to be with his 'devastated' family and friends.

A witness said one of Cooper's distraught neighbors ran from the building after seeing him several days earlier.

“A neighbor came out and said he had just spent Christmas Eve with him and he said it was the best Christmas Eve he had ever had,” the witness told police. New York Post.

Cooper's last post on social media was of himself standing next to a Christmas tree in the lobby of the historic police building that houses three apartments he sold.

In the hours after the man was found, police investigators were speaking with building officials

Another witness described how Cooper hit his head on a green wooden construction wall and then landed on his back on the sidewalk.

He had a cut on his forehead and the side of his head, the witness said.

'He didn't talk at all, he was bleeding from his head. Are [left] leg was broken. The middle part of his body looked like it was just a bag of bones,” he said.

It is believed Cooper jumped from the fourth floor, where he lived in apartment 4A, and a window could be seen half open from the street below.

Photos of the scene taken around this time showed blood on the sidewalk.

First responders rushed Cooper to a nearby hospital, where he was pronounced dead.

The man jumped from the fourth floor just before 7:30 this morning

First responders rushed the man to a nearby hospital, where he was pronounced dead.

The building dates from 1905 and is divided into eight private units. In 2022, one unit was rented for $9,000 per month.

Cooper is the latest New Yorker to jump out of swanky Manhattan buildings in recent weeks.

Last week, a 35-year-old woman died after jumping from a high-rise known as The Brittany, near Mayor Eric Adams' Gracie Mansion home.

In October, a 47-year-old man jumped to his death from the Gotham Hotel in Midtown. Over the summer, three men died within two days of committing suicide.

One of those men died when he jumped from a luxury high-rise.

If you or someone you know is struggling with thoughts of suicide, call the Suicide Prevention hotline on 988 or visit SuicidePreventionLifeline.org.