A father-son duo accused of squatting in a Queens storefront were charged by the feds Thursday with setting the business on fire — just hours before they were supposed to be evicted.

Narinder Singh, 56, and his 29-year-old-son Jawahar Singh were allegedly caught on the building’s own security cameras placing paper towels on a hot plate to set off the Feb. 18 inferno, federal prosecutors said.

Authorities only became aware of the footage after the younger alleged firebug, who is an illegal immigrant, told the FDNY about the video system in the Richmond Hill store, the feds said.

The Singhs, who live on Long Island in Nassau County, have been locked in a yearslong “acrimonious” legal battle with their landlord, who was trying to boot their print shop from the building, according to prosecutors.

The landlord claimed in civil court docs that the pair were squatters who signed a fake lease for the space, according to the criminal complaint filed against the father and son.

The standoff came to a head on Feb. 17, when a judge denied an emergency request by the Singhs to avoid being evicted from the space the next day, federal authorities said.

At around 8:15 p.m. that night, the pair were seen on video moving a table with the hot plate and rolls of papers towels on it to a section of the store, and then plugging into an electrical outlet, according to the complaint.

The dad and son left, and four hours later, one of the paper towels caught fire, leading to a quick-spreading blaze just after midnight that destroyed the entire space, the complaint states.

“At the scene of the fire, the defendant Jawahar Singh stated to FDNY officers that the Print Shop contained internal video surveillance cameras,” the court doc states.

Jawahar had been “hiding in the crawl space of the house,” when detectives showed up to look for the father-son duo, prosecutors said during his arraignment in Manhattan Federal Court on Thursday. 

The men were each charged with a count of malicious use of fire to destroy property used in interstate commerce by the US Attorney’s Office for the Eastern District of New York.  

Prosecutors also revealed Jawahar is an Indian national who entered the US in October 2018 on a tourist visa during his arraignment. 

He overstayed the tourist visa and was arrested in 2019, but has remained in the country. A judge had already given him an order of removal, and an immigration detainer was placed on him on Thursday, prosecutors said. 

Jawahar’s passport is currently with his immigration attorney, who is appealing his asylum rejection because he is married to a US citizen.

“The point is, he’s fighting very hard to stay in this country. He doesn’t want to leave it. He doesn’t have the resources to do that. He is a young man; it is simply not plausible that he’s going to spend the rest of his life on the run,” his attorney, Robert Caliendo, told the courtroom when arguing that Singh was not a flight risk.

Jawahar appeared frail and spoke quietly as four of his family members sat in the courtroom audience, including his mother and sister. 

He was ordered held on a $100,000 bond and asked to obey a curfew and not drive, as he has a suspended license. 

Narinder Singh is slated to be arraigned on Friday.