This study focused a separate residence of single-person household which is recently growing rapidly, analyzed exchanges and mutual aids in respect of network residence, scope of family recognition, realities of housing expenditure burden, etc. and sought policy implications. For this, a survey was performed for 1,000 single office women nationwide from 20’s to 40’s who are living apart from their main families. The results of this study are as followings. First, major elements of choosing residential areas for single career women are accessibility for mass transportation, convenience for workplace and cheap housing expenditures and the most layout of residence housing was a type with more than 2 bedroom space. Second, as for separation cause, workplace(64%) followed by seeking independence life(24%) was most and they communicated with main families with mobile phones(98%) once in 2~3 days(30%) as for major communicating means. Third, it was found that the average monthly income was 2,100 thousand Won and composition of expenditure was housing expense including rental fee and administration charge(17%, 360 thousand Won), food expenses including eating out(19%, 400 thousand Won), transportation & telecommunication expenses(10%, 210 thousand Won), living expenses including shopping(21%, 120 thousand Won), money transfer to main families(6%, 120 thousand Won) and saving amount(27%, 570 thousand Won).