This research analyzes different aspects of housing market dynamics and policies, focusing on the implications for inequality, housing cost, access to housing, and neighborhood change. Chapter two examines exclusionary screening criteria in online rental listings, revealing patterns of discrimination against individuals of lower socio-economic status. Chapter three analyzes the relationship between neighborhood characteristics and housing renovation activity over a ten-year period, highlighting the influence of factors such as housing age, homeownership rates, and median household income on housing renovation activity in neighborhoods. Chapter four explores the effects of housing code violations on neighborhood home sales prices and rental rates, highlighting the relationship between housing code enforcement and affordability. These chapters underscore the importance of targeted policy interventions to address housing barriers and promote equitable housing opportunities.