The city Buildings Department has uncovered eight illegal apartments in the basement of 750 Grand Concourse in The Bronx — where one tenant was stricken by a rare rat-borne disease.

“There is a partial vacate of the illegal SROs in the basement of 750 Grand Concourse,” a Buildings Department spokesman said.

Three cases of leptospirosis were identified in a one-block radius of the building over the past two months, according to the city Health Department.

One person died and two were seriously sickened — including Braulio Balbueman Flories, who told The Post he resided in one of the basement apartments.

The Health Department also has slapped the landlord with violations for allowing the building to become a breeding ground for rats.

Leptospirosis is normally seen in animals. But rats can spread the bacterial disease to humans.

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