Housing is a key area of public policy concern, and legal regulation of local government housing policy formulation and implementation has a decisive impact on policy effectiveness. Feedback on government housing policies affects public trust in government, and party regulations play a key role as a legal regulatory tool. This paper analyzes the role of party regulations in legal regulation of local government housing policy formulation and implementation using the double difference method. The study is based on data from 60 large and medium-sized cities from February 2017 to February 2021, and the empirical sample is optimized by PSM propensity score matching to ensure that there is no significant difference between the treatment group and the control group on key control variables. The results show that party regulations have a significant positive impact on the housing rental price index with a coefficient of 17.451 (p<0.01), confirming that party regulations promote the effectiveness of legal regulation of housing policies. Marginal effects analysis reveals that owning a home significantly reduces the probability of being “very unhappy” by 0.0036 and increases the probability of being “very happy” by 0.0286, indicating that housing rights and interests have an important impact on public well-being. After the policy intervention, housing rental prices in the control group show a more obvious downward trend, while prices in the treatment group decline slowly, confirming that party regulations enhance political trust through explanatory effects. The study suggests improving the land approval system, optimizing the affordable housing protection system, and establishing an accountability mechanism for market supervision, in order to improve the effectiveness of the implementation of the Party's internal regulations in the regulation of housing policies, and to enhance the legal guarantee for the implementation of the government's housing policies.
