St. Louis County, MO Outdoor Lighting: Light Trespass & Shielding (2026)

Section 1005.320.1 is as much a history rule as a design standard. Before 1968 the St. Louis County Subdivision Ordinance did not require subdivisions to have street lights at all. Since 1968, any new subdivision has been required to have them as a condition of development approval. That single date explains most of the variation a resident sees driving across the county: whether a given street has lights usually depends on which side of 1968 its plat falls on, not on how busy the street is.

The second half of the section is about money, and it is unusually blunt for a code provision. St. Louis County is not responsible for any cost or maintenance of subdivision street lighting. The cost of maintaining the lights is typically borne by subdivision residents through homeowner fees. That is why a dark light on a residential street in a county subdivision is not a county repair item, and why two adjacent subdivisions can have visibly different lighting depending on what their own residents fund.

There are a few ways subdivisions carry that cost. A trust account funded by the developer at build-out covers the early years in some subdivisions. Individual homeowner contributions cover it in others, which works only as long as neighbors keep paying voluntarily. The formal and durable route is a Street Light Maintenance District under RSMo §235, which spreads the cost across every property rather than the households that volunteer. Forming one is a multi-step process: at least 100 voters, a petition to the County Council, a public hearing, and a vote of the residents who would be paying the assessment.

For a light that is simply out rather than absent, the report generally goes to Ameren at 1-800-562-7583, which services most subdivision lights.