The Rent Stabilization Protection Amendment Act of 2025 aims to amend the Rental Housing Act of 1985 by removing the exemption from the Rent Stabilization Program for units rented to tenants using tenant-based subsidies. The bill prohibits subsidy administrators from paying increased rents without proper notice that complies with the Rent Stabilization Program and disallows any agreements that waive the program's requirements. Additionally, it empowers subsidy administrators to challenge inappropriate rent increases while ensuring they do not deny reasonable rent increases. The bill also allows for reasonable rent increases after a tenant voluntarily vacates a unit.

Key amendments include the addition of definitions for "subsidy administrator" and "tenant-based subsidy program," as well as changes to the Rent Stabilization Program's applicability to rental units occupied by tenants with such subsidies. The bill specifies that subsidy administrators must receive proper notice before making payments to housing providers and mandates that they ensure compliance with the Rent Stabilization Program for any rent adjustments. Furthermore, it establishes that petitions regarding rent adjustments for units under the Rent Stabilization Program will always be considered timely, and it modifies the language in various sections to reflect these changes.