The four-alarm fire broke out around 5:30 p.m. Saturday on the upper level of the three-story Howard Avenue home in a Jewish Orthodox neighborhood at the corner of Dakota Avenue.
The residents were away on vacation, responders said.
The blaze quickly spread, forcing firefighters to back out before the rear roof collapsed.
It took nearly three hours to knock down, after which firefighters continued to douse hot spots.
No injuries were reported.
Clifton, Paterson, Little Falls, Totowa, Wallington and Woodland Park firefighters were among the responders who assisted their Passaic colleagues.
ALL PHOTOS: Damien Danis for DAILY VOICE
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ALSO SEE: A Passaic County gas station where a horrific heroin-involved crash killed three people earlier this year was robbed at gunpoint Saturday night, authorities said.
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