Annexation - As introduced, requires a municipality to obtain approval of a proposed annexation from the county legislative body; requires the municipality to submit certain reports to the county legislative body regarding the proposed annexation. - Amends TCA Title 6, Chapter 51, Part 1.

SB 2311 requires Tennessee municipalities to obtain county legislative body approval before annexing territory. It mandates municipalities to submit a financial impact study (covering infrastructure, schools, and taxpayer costs) and a statement proving service capacity (water, roads, police, etc.) to the county. Counties must review these documents within 60 days, and if they don’t approve within 90 days, the annexation is automatically denied. The bill excludes small annexations of five acres or less and does not override existing interlocal agreements.