Outstanding in the Old Parts of Pasai Donibane and Pasai San Pedro are palatial mansions and noble family houses. This kind of building, dating prior to 1800, has a particular typology-architecture setting it apart from the other constructions: self-standing houses like Arizabalo Mansion, or semi-detached like the Platain, Miranda and Villaviciosa houses, all in Pasaia Donibane. There are also narrow, deep terraced houses such as that backing onto Platain House and several family houses such as numbers 44 and 46 of San Pedro. Lastly, we mustn't forget to mention the various bridge-houses typical of Pasai Donibane.
But we can also find popular or middle-class houses: houses with facades in direct contact with the estuary or with their facades looking out onto the estuary; houses with two facades, one looking inland and the other facing the estuary (as is the case of Pasai Donibane); or streets or other spaces looking out over the estuary, such as Bonantza Ibilbidea and the Calle San Pedro. It is also common in Pasai Donibane to find popular or middle-class farmhouses backed against the hillside and entered by a side stairway.