Senate Bill No. 400 amends existing laws regarding the handling of abandoned buildings by municipalities in Oklahoma. The bill defines an "abandoned building" as one that is not currently occupied and has been declared unsecured, dilapidated, or unoccupied. It establishes procedures for municipalities to abate public nuisances caused by such buildings, including providing at least ten days' notice to property owners and mortgage holders before holding a hearing. The bill also allows for the designation of an administrative officer to carry out these duties and provides property owners the right to appeal decisions made by this officer.

Additionally, the bill introduces a new section that allows municipal governing bodies to declare buildings unoccupied if they have remained so for over 365 days, causing increased municipal costs and devaluing nearby properties. Similar notice and hearing procedures are required before a building can be declared unoccupied and subject to abatement. The bill emphasizes the importance of maintaining public health and safety while providing municipalities with the necessary tools to manage abandoned and unoccupied properties effectively. The act is set to take effect on November 1, 2025.