Cops have pulled whatever evidence they could from the “very cluttered” Long Island property of accused Gilgo Beach serial killer Rex Heuermann — and his family is welcome to move back in, officials said Tuesday.

It’s still unclear whether Heuermann killed any of his victims in the ramshackle Massapequa Park home, where he lived with his wife and adult daughter and stepson, authorities said.

“The evidence doesn’t point one way or the other” that someone was killed in the house, either, Suffolk County District Attorney Ray Tierney told reporters at a press briefing at the scene.

“Nothing of note” was found when police dug up Heuermann’s backyard “as far as remains,” either, he said.

Still, “I would say that we obtained a massive amount of material, all of which has to be cataloged and analyzed, and it’s going to take quite some time,” the DA said.

“A 13-year-old cold case doesn’t get solved in a matter of weeks or days. It’s not like TV.”

Tierney said “there’s no indication specifically” that Heuermann’s family knew anything about the crimes, adding they can move back in once the cops have completely pulled out.

“We are, for all intents and purposes, done with the search,” the prosecutor said. “We’re going to rely on the Suffolk County crime lab to withdraw at a time that they deem appropriate.”

Heuermann, 59, an architect with a Midtown office, was arrested July 13 and charged with murder in the deaths of three women whose bodies were found on Gilgo Beach in December 2010 — Megan Waterman, Amber Lynn Costello and Melissa Barthelemy.

He remains the prime suspect in the death of a fourth victim, Maureen Brainard-Barnes, with the slain women known collectively as the “Gilgo Four.” Cops have said they worked as escorts before they disappeared.

A total of 11 bodies were found between 2010 and 2011 in the roughly the same marshy area of the beach. Cops have yet to identify the killers of the other people.

Heuermann’s wife, Asa Ellerup, who officials said was “embarrassed” and “disgusted” after her husband’s arrest, has since filed for divorce — and it’s unclear if she plans to return to the infamous address.

Ellerup has been spotted out and about with her son, Christopher Sheridan, and her and Heuermann’s daughter, Victoria, who worked as a receptionist at his office. The family was out of town when the women were killed, authorities have said.

Police said Heuermann was a frequent solicitor of sex workers, responding to ads on Craigslist and other online channels and is believed to have paid the victims for sex before they disappeared.

Since the suspect’s arrest, state and Suffolk County cops thoroughly combed through the family’s home and property and executed search warrants at two area storage units.

Harrison said this week that police found a massive walk-in vault at the home, which Tierney said Tuesday was located in the basement. He said cops seized 279 weapons during their search.

Police also brought in an excavator, ground-penetrating sonar equipment and three police cadaver-sniffing dogs to scour the space for possible bodies or “trophies” of the killings.

The architect bought the home, where he grew up, from his mother in 1994, the same year he founded RH Consultants and Associates, which had offices on Fifth Avenue in Manhattan.

The accused killer pleaded not guilty at his arraignment and is being held without bail.