Analysis of Factors Cause Changes and Added Space on the Housing Type 21 m2 (Case Study of Gunung Anyar Housing Surabaya)

Type 21 m2 housing is a limited area of housing to meet the needs of inhabitants of the middle and lower classes. In the process of inhabiting most of the occupants of type 21m2 housing have made room changes from the standard design provided by the developer. This is done to meet the needs of residents caused by certain factors. The location of the research was carried out in the Gunung Anyar Surabaya housing which is a strategic location that is close to the education area, trade facilities and MERR roads (Middle East Ring Road). This study aims to reveal factors that influence changes in space in type 21m2 houses both external and internal factors. The method used is descriptive qualitative method with a method of taking cases by purposive sampling. The results of the study showed that the average first space added was the kitchen. This is due to the unavailability of kitchen facilities on the standard design of 21m2 type houses. The next addition is the bedroom, family room, living and dining room. The factors that cause change and increase in space are divided into two, namely external and internal factors. External factors that influence these changes are due to the rapid development of the area around the mountain housing caused by the Surabaya MERR east ring road. While internal influences are caused by, among other things, increasing income, increasing family members, increasing the age of family members, increasing vehicles, wider space requirements, and building quality factors that have been