#Inside the ‘Amityville Horror’ house today, Long Island’s most notorious mansion

One of the country’s most famously creepy houses is back in the news.

Ronald DeFeo Jr., the notorious killer at the “Amityville Horror” house — a dwelling whose mystique continues to fascinate the public in the wake of a subsequent book and film franchise — died in prison Friday at 69.  

DeFeo, whose nickname was Butch, spread terror across Long Island following the gruesome 1974 slaying of his family at their home at 108 Ocean Ave. 

The home — its original address was 112 Ocean Ave. but was changed to 108 to deter tourists — was purchased by George and Kathy Lutz one year after the murders. But they ditched the property after only one month due to reported paranormal activity, which inspired a 1977 book and 1979 movie.

On Nov. 13, 1974, DeFeo — who was 23 at the time — shot and killed his parents, Ronald and Louise DeFeo, both 43, and his two brothers and two sisters, ranging in age from 9 to 18.

The house has been on the market four different times since the murders. It was last listed in June 2016 and sold in March 2017 for $605,000, according to property records. 

The Post has reached out to the current owners for comment.

Scroll through the photos below to see both past and present shots of the infamous home. 

Described as a “Stately Center Hall Colonial,” the home is made up of five bedrooms and four bathrooms. 

The property sits on Amityville River and features a large boat house with a boat slip and two-car garage. 

Renovations of the property took place as recently as October. 

Built in 1925, the single-family home sits on a 10,900-square-foot lot.

DeFeo Jr. was convicted in 1975 of six counts of second-degree murder and received six sentences of 25 years to life.

He was serving his sentence at Sullivan Correctional Facility in Fallsburg, New York, when he died. He had been transferred to Albany Medical Center and pronounced dead at 6:35 p.m.

An autopsy is underway.