The robbery was reported at about 11 a.m. in the 400 block of Visitacion Avenue, according to police.
A woman knocked on the victim's door, and when he opened it, a man took out a gun and entered the home along with the woman and another man, police said.
The suspects locked the victim, a 43-year-old man, in a closet during the robbery. When he eventually escaped, the suspects were gone, as was his cellphone, laptop computer, flat-screen TV, and his van, according to police.
The man was uninjured during the robbery.
No arrests have been made in the case, and detailed suspect descriptions were not immediately available, police said.