A house owned by the political donor and property developer Donghua Liu is being investigated by the Auckland Council amid health and safety concerns.
The rundown 1940s property, near the motorway overpass in Newmarket, has a council valuation of $2.6million.
The council confirmed it received a complaint about overcrowding, safety and sanitary concerns at the Edgerley Avenue property.
It said it has not had any complaints about other property owned by Mr Liu.
Mr Liu has hit the headlines several times since qualifying for New Zealand residency in 2004.
Mr Liu has also found himself in the spotlight over his relationship with both the Labour party and Prime Minister John Key.