The man, named locally as Mario Perivoitos, suffered injuries to this throat and was taken to hospital, but was pronounced dead two hours later.
The man was taking part in a BBC documentary at the time of the attack.
'A lot of blood'
Neighbour Geoff Morgan, 52, who was home at the time, said: "I heard shouting - 'Get him off! Get him off me!'
"He was shouting really loudly. He was bleeding from his neck. There was a lot of blood."
Avraam Avramidis, 31, who lived upstairs, said: "For me, Mario was a good guy. He was actually very clever."
A dog owner was mauled to death by his Staffordshire bull terrier in front of BBC TV crews who were interviewing him for a documentary (stock image)
A police notice pinned to the door of the flat suggested Mr Perivoitos had been served with an anti-social behaviour closure order in February, which was due to expire in May.
A post-mortem examination at Haringey mortuary on 24 March gave the cause of death as "hypovolemic shock and damage to the airway consistent with a dog bite", police said.
The dog owner's death is not being treated as suspicious and next of kin have been informed.
Police were called at about 22:25 GMT after the attack. The dog was seized by officers and remains in secure kennels.
A BBC spokesman said: "A crew making a BBC documentary were present - but not filming - at the time of the incident and called an ambulance. Given the ongoing inquiries, it would not be appropriate to comment further."
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