You don't need a hukou to buy a house in Tianjin, and foreigners buy a house in Tianjin. Non-Tianjin registered households who can provide personal income tax certificate or social insurance payment certificate accumulated in Tianjin 1 year are restricted to purchase 1 house (including newly-built commercial housing and second-hand housing).
Non-resident families who own 1 set or more houses in this city, and cannot provide the accumulated 1 year personal income tax payment certificate or social insurance payment certificate in this city, should suspend the sale of houses to them.
In violation of the provisions of the purchase, not for real estate registration. If it is a one-time payment, tax payment and social security can be accumulated; In the case of loan, the bank requires that it must be continuous 12 months and cannot be accumulated.