The article discusses the specifics of the transaction of residential real estate purchase agreement in terms of ensuring the rights of persons with an indefinite right of residence in the residential premises being sold. Separately, the issue of determining the shares of family members when purchasing residential premises using the funds of maternal (family) capital is raised. The combination of general legal and private legal methods of cognition made it possible to analyze and summarize the materials of law enforcement practice and suggest ways to improve the current legislation. In particular, the revealed legal uncertainty in the implementation of these issues, which leads to a violation of law and order and the need, firstly, for the legislative consolidation of an independent type of property right of the owner's family members who did not participate in the privatization of residential real estate, and secondly, the specification in the legislation of the procedure for transferring shares to minors when acquiring residential real estate using the means of maternal capital.