A Bronx father of four was gunned down outside his own home early Sunday morning in a deadly dispute over a parking spot — with his girlfriend also “badly beaten” in the melee, police and relatives said.

Trevor Hughes, 49, was shot shortly before 2 a.m. after getting into a heated exchange with 46-year-old ex-con Lavar Davis, whose car was allegedly blocking a driveway where the hard-working dad paid to park next to his Fowler Avenue home.

“It was all over a parking space,” Hughes’ brother told The Post Monday. “He took all the steps that you’re supposed to take when you want a car removed from blocking your driveway. A patrol car came, and all they had to do was ticket the vehicle.

“Ticket the vehicle, get it towed, and that’s it. All he wanted to do was get inside so he could get four hours of sleep Then he had to be up again to DJ for a brunch.”

Prosecutors said Monday that Davis fled the crime scene but cops caught up with him at his girlfriend’s apartment.

“When police officers went to find the defendant there he barricaded himself in the apartment and refused to come out voluntarily, requiring the police to send in the Emergency Services Unit to get him out,” Bronx Assistant District Attorney Lawrence Rozenblum said at Davis’ arraignment.