Today, there are a few dozens of historical index houses in the city Sabzevar. Reviews show that up until now, despite the presence of their special characteristics, variety and role, there have not been comprehensive studies about them but through the presence of valuable samples from various historical periods (Teymouri, Safavid, Qajar, Pahlavi), their exposure to destruction through changing the method of living, multiplicity of owners, migration and generally loss of attractions for today's life, reviewing these houses is necessary. Since most of the historical houses in Sabzevar are from the Qajar period, the purpose of this article is to read and recognize Qajari houses. The used research method is combined and the results obtained from the study show that Sabzevar's houses, with architectural specifications such as semi-hot and arid climate, have mostly been made as introvert houses and they can be divided to three types of the first, second and third period based on the features of architectural space, structure and decorations. Discussion of architectural typology has been proposed in some of the European countries since the late 11th century. At first, this topic was treated in a very clichéd way and they reviewed categorization of buildings based on a mutual feature. Another one of methods of categorization at this time was dividing the buildings with mutual feature of their map. This method has many advantages, but unfortunately, by being drawn in one way of thinking, being caught up in a deterministic framework and linking historical process with deterministic materialistic views, they came to conclusion and the result of it is predetermined by considering the mentioned framework whereas in a study, in addition to the overall review, the results shall be obtained after the study and research.
Accurate identification and classification of various architectural types can be useful in understanding the space better, protecting it and also in achieving new methods of designing.
