The thesis aims to study the development of late 19th and early 20th century domestic architecture in B&uuml / y&uuml / kada and Kadik&ouml / y as new resort districts of Istanbul. The urban development of Istanbul and B&uuml / y&uuml / kada is introduced as a basis to discuss the architectural context and domestic life. The discussion centers on the emergence of concept of &lsquo / resort houses&rsquo / as a new dwelling type in Istanbul in the late Ottoman period. Selected case studies are described and compared to illustrate how such houses were conceptualized, built and utilized.