Gilgo Beach serial murder suspect Rex Heuermann is “very comfortable” in his maximum-security cell, has promised guards “it won’t be a problem” and has had no visitors as his wife of 27 years files for divorce.

Suspected Gilgo Beach killer Rex Heuermann is “very comfortable” in his cell at the Suffolk County jail, authorities said Thursday, days after placing Long Islander, 59, on suicide watch.

Released by the Suffolk County Sheriff’s Office on Thursday, the update comes days after an attorney for the Long Island resident claimed his client had been “traumatized” after his arrest in Manhattan last week.

It also comes as investigators continued to ransack the Massapequa Park home he shared with now-ex-wife Asa Ellerup, who filed for divorce this week, and their adult daughter and stepson of decades on Thursday.

Feds and local police involved in the investigation said they are looking for evidence that could link Heuermann to the 2010 deaths of three sex workers in Gilgo Beach.

He is also the prime suspect in a fourth murder that took place on the same quarter-mile stretch of shoreline, but has yet to be charged.

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Heuermann, charged with three counts of murder, is currently being held at the Suffolk County Correctional Center. Officials said the suspect promised to be “extremely compliant” while he awaits trial. A week later, he still hasn’t received a visitor, including family.

Speaking to local reporters a week after Heuermann’s incarceration at the Suffolk County Correctional Facility, Sheriff Errol Toulon revealed that the suspect promised to be “extremely compliant” while he awaits trial, and has yet to receive a visitor.

Speaking to WCBS 880 about the Manhattan architect’s situation in the maximum-security facility, Toulon said: “He’s getting all the services that any other incarcerated person would get.”

He added that the suspect is not in solitary confinement, but is still alone in a ‘cell’.

The local law enforcement officer, whose police force has been bombarded by a hive of media attention since the bodies of the three sex workers were linked to Heuermann, proceeded to shed more light on the suspect’s condition behind bars.

“He seems to be very comfortable in his cell and his surroundings,” the sheriff said.

“He indicated to my staff that he wouldn’t be a problem for us and would be extremely compliant, so we’ll see how that plays out in the days and weeks ahead.”

In the meantime, Toulon said, Heuermann will remain on suicide watch while in a single cell, a move Toulon called “pretty standard for someone who comes in with a case of this kind of notoriety.”

He added that the ‘jail mental health staff will re-evaluate [Heuermann] to see if they really feel that you are suicidal at any point during this time.

On Thursday, the Toulon office confirmed his claim earlier that day that Heuermann has yet to receive a single visitor during his seven days of imprisonment. -including his family members.

Still, he said, the suspected serial killer is settling in.

Speaking with Alex Caprariello on Wednesday, Toulon added that the suspect has his own personal television in the cell, but has not been watching the news.

He also revealed that the alleged murderer “sleeps a lot” and “seems to be reflecting.”

‘Rex has a TV,’ he said. ‘[He has] two corrections officers watch him at all times.

He is eating normally, without extreme changes in behavior.

He has not had visitors.

Speaking to local reporters a week after Heuermann’s incarceration at the Suffolk County Correctional Facility, Sheriff Errol Toulon revealed that the suspect promised to be “extremely compliant” while he awaits trial, and has yet to receive a visitor.

His wife, Asa Ellerup, was seen walking with a cane outside a Long Island Best Buy Wednesday, along with their daughter, Victoria Heuermann, 26, (left) and adult stepson (right). That same day, she filed for divorce.

None of the family members have visited the disgraced architect, who was arrested outside his Midtown architecture practice last Thursday night.

The Heuermann-Ellerup home on Long Island is shown Saturday as investigators remove items from the home. Still ongoing as of Thursday, the search is leveling off in hopes of finding more evidence linking Heuermann to any murder.

Ellerup, who has yet to visit her ex, was born in Iceland but immigrated to the United States as a child and married Heuermann more than 20 years ago. Her lawyer said Wednesday: “Her life and her children’s lives have completely changed.”

Heuermann, 59, was arrested outside his Manhattan firm and charged with the murder of three women. He is the prime suspect in a fourth homicide.

Meanwhile, outside jail, Heuermann’s wife, Ellerup, a 59-year-old Icelandic native, filed for divorce after 27 years of marriage in Suffolk County Supreme Court on Wednesday, the same day her attorney, Bob Macedonio, told Fox News the family is in a “whirlwind” after the arrest.

The outlet snapped a photo of his adult daughter and son outside a Long Island Best Buy on Wednesday, the same day he filed for divorce.

“Her life and that of her children have been completely turned upside down,” Macedonio told the publication. “They were at home and the police came in, and they were completely shocked.”

It has since emerged that Heuermann owns two other homes, in Las Vegas and South Carolina, and police are investigating whether he might be linked to any unsolved murders there.

Under New York state law, all filings in divorce proceedings are sealed from public scrutiny, but the names of the cases and parties are recorded and published.

Asa Ellerup v. Rex Heuermann is listed as an ‘uncontested’ matrimonial filing dated Wednesday, with a complaint, summons and ‘notice regarding continued health care coverage’ filed and processed.

Macedonio told DailyMail.com on Wednesday: “I can confirm that we filed a summons for divorce today in the Suffolk County Supreme Court.”

She said Ellerup was home at the time of her husband’s arrest in Manhattan, and authorities simultaneously swept in to search the residence.

“When they made the arrest, they executed the search warrants at exactly the same time, so there is no notice for anyone to destroy any type of evidence,” Macedonio said. “So while they were pulling him over in Manhattan, there was already a team waiting at the house to do it as soon as they caught him so he wouldn’t call and say ‘hello.’

The suspect’s home is located directly north of Gilgo Beach, across South Oyster Bay.

An aerial view of the area near Gilgo Beach and Ocean Parkway on Long Island

She said ‘no comment’ when asked by DailyMail.com if Ellerup had been aware of her husband’s alleged crimes and if Ellerup had had any communication with her husband since his arrest.

Ellerup, whose hair was found at one of the crime scenes but is not believed to be an accessory, attended Farmingdale High School and was briefly married in her 20s, divorcing in the early 1990s in Queens.

It was not clear if he had a professional life outside of the home.

His 26-year-old daughter Victoria Heuermann worked with her father as a receptionist. The identity of her son is unknown. The New York Times He said he has special needs.

The family kept to themselves, and neighbors said no one remembered being invited to their home.

The police investigation into the murders, along with that of the FBI, is still ongoing, after linking ten sets of human remains found at Wantagh on April 15, 2011 to Heuermann.

Police believe the victims were killed by the same person.