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Cass County, MO Outdoor Lighting: Light Trespass & Shielding (2026)

Some Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Governing section: § 400.680(A)(8), Zoning Order Article XI
Standard: Minimal lighting, directed away from adjacent residential uses
Enforcing agency: Cass County Planning and Zoning Department
Correction window: 10 days after notice of violation, § 400.030(22)
Maximum penalty: $1,000 per day, each day a separate offense
Applies to: Off-street parking and loading areas only

Summary

In unincorporated Cass County, off-street parking and loading area lighting must stay minimal and cannot cast light pollution onto adjacent residential properties. Cass County Code § 400.680(A)(8) requires fixtures to be directed away from nearby residential uses, a standard the Planning and Zoning Department applies when it reviews parking lot lighting plans submitted with a zoning action.

These county ordinances apply to unincorporated areas of Cass County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

Any lighting used to illuminate off-street parking and loading areas shall be minimal and not create a negative light pollution impact on any adjacent residential properties and be directed away from the residential use. Lighting installed as part of new construction shall not create light pollution on adjacent residentially designated areas.

View official code

Full Breakdown

Article XI of the Cass County Zoning Order sets design standards for every off-street parking and loading area built in the unincorporated county. 680(A) lists eleven numbered requirements, and item 8 addresses light trespass directly: fixtures illuminating parking and loading areas 'shall be minimal and not create a negative light pollution impact on any adjacent residential properties and be directed away from the residential use,' and the same limit applies to lighting installed with new construction. 800(C)(6)(c) caps billboard-face lighting at twenty foot-candles); instead it is a directional, qualitative standard covering shielding and aiming, not a lux table.

670(A)(1). 030(22), not by the Sheriff's Office. Loading areas next to residential uses carry an additional screening duty under item 11 of the same section: where a loading area's operations create a negative impact on adjacent uses, the County can require a visual screening barrier. 680 are the county's only codified light-trespass standard for parking and loading facilities.

Violations & Fines

Cass County Code § 400.030(22) governs zoning enforcement: after notice from the Zoning Officer, a property owner has ten days to correct a light-trespass violation. A party a court determines failed to comply is guilty of a misdemeanor, and the Commission may set fines that shall not exceed one thousand dollars ($1,000.00) per day, with each day of continuing violation a separate offense.

Frequently Asked Questions

Does Cass County limit light trespass from a neighbor's parking lot?

Yes, but only for off-street parking and loading areas regulated under the Zoning Order. Section 400.680(A)(8) requires lighting to 'be minimal and not create a negative light pollution impact on any adjacent residential properties and be directed away from the residential use.' There is no separate foot-candle cap for this rule, so enforcement turns on whether the fixture is aimed and shielded away from homes, not a specific brightness reading.

Who enforces the parking lot lighting standard in unincorporated Cass County?

The Cass County Planning and Zoning Department, through the Zoning Officer, enforces Section 400.680(A)(8) as part of the Zoning Order violation process in Section 400.030(22). The Zoning Officer issues written notice, the property owner gets ten days to correct the lighting, and unresolved violations go to Circuit Court where a judge can impose fines up to $1,000 per day.

Does this rule apply to house-to-house yard lighting?

No. Section 400.680(A)(8) sits in Article XI, Parking and Loading Requirements, and by its terms covers lighting that illuminates off-street parking and loading areas, the kind attached to commercial, industrial, or multi-family sites. The Cass County Code does not contain a separate light-trespass standard for ordinary residential yard or security lighting between neighboring houses.

Sources & Official References

[1]Cass County Code (eCode360)

Other rules in Cass County

Parking Rules: Street Parking LimitsSome Restrictions Noise Ordinances: Quiet HoursSome Restrictions Parking Rules: RV & Boat ParkingLight Restrictions Dark Sky RulesLight Restrictions Billboard LightingSome Restrictions Noise Ordinances: Decibel LimitsSome Restrictions Parking Rules: Abandoned VehiclesSome Restrictions Parking Rules: Snow Removal Parking RulesSome Restrictions

All Cass County rules

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