In 1958 he graduated from the Architecture Department of the Yerevan Polytechnic Institute with a diploma of excellence, receiving the qualification "Architect" At the institute he was taught by the professors Rafayel Israyelyan, Samvel Safaryan, Varazdat Harutyunyan, and the head of his diploma work was Mikayel Mazmanyan.
As a senior architect, he started to work at the newly opened Yerevan Project Institute, in Gevorg Tamanyan studio.
He designed several projects: residential and administrative buildings, schools (after Shirvanzade-1961), designed the plans of the settlement after Lukashin and the settlements of Kanaker Hydro Power Plant (1959-1961) Since 1964, he worked at Academy of Arts of the Academy of Sciences of Armenia as a junior researcher, then he became the Scientific Secretary of the Institute.
He was the first to explore the Armenian-Byzantine, Armenian-Georgian, Armenian-Iranian architectural relations Hasratyan is the author of nearly two dozen books, numerous brochures, hundreds of articles, theses, reviews and encyclopedia articles published in Armenia, Moscow, Kiev, Tbilisi, Paris, Lyon, Vienna, Lisbon, Rome, Venice, Milan, Bologna, Naples , Montreal, Yokohama, Ankara.
The same composition of the author on the occasion of the 50th anniversary of the USSR was published in Moscow in 1972 by the "Architecture of Soviet Armenia"։ For the collective fundamental work of "History of Armenian Art",[3] which authored sections dedicated to the history of Armenian architecture Hasratyan was awarded the 2009 State Prize in Fine Arts.