Leviticus 25:29-31

29And if a man shall sell a dwelling house in a walled city, then he may redeem it within a whole year after it is sold; within a full year may he redeem it. 30And if it shall not be redeemed within the space of a full year, then the house that is in the walled city shall be established for ever to him that bought it throughout his generations: it shall not go out in the jubilee. 31But the houses of the villages which have no walls around them shall be counted as the fields of the country: they may be redeemed, and they shall go out in the jubilee.1