Residential Leases - Use of Algorithmic Device by Landlord to Determine Rent, Occupancy, and Lease Terms - Prohibition

HB 434 prohibits Maryland landlords from using computer programs (algorithmic devices) that rely on nonpublic competitor data - like actual rent prices or occupancy rates - to set rent, lease renewal terms, or occupancy levels for new residential leases. It directly affects residential landlords who might use such tools to adjust pricing or lease conditions. The law defines "nonpublic competitor data" as information not widely available, such as rivals' rent amounts or tenant turnover rates, and excludes tools used for affordable housing programs or anonymized industry reports. Violations would be treated as unfair trade practices under Maryland's consumer protection law, with enforcement starting October 1, 2026, for new leases only.