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Petaluma, CA Outdoor Lighting: Light Trespass & Shielding (2026)

Some Restrictions

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

Key Facts

Reflected glare maximum: 0.3 foot-candles
Reflected glare average: 0.1 foot-candle
Upward advertising beams: prohibited without temporary sign permit
Measured at: adjacent property per § 21.120(B)
Enforcing officials: Zoning Administrator / Building Official

Summary

Petaluma limits reflected light off a building's walls or roof to 0.3 foot-candles maximum and 0.1 foot-candle average as measured at neighboring property, and separately bans deliberately casting a beam upward for advertising unless a temporary sign permit has been issued.

2. Indirect Glare. Indirect glare is defined for the purpose of this ordinance as illumination visible at the points of measurement specified in Section 21.120(B) caused by diffuse reflection from a surface such as a wall or roof of a structure. Indirect glare shall not exceed that value which is produced by an illumination of the reflecting surface not to exceed: .3 foot candles (maximum) .1 foot candle (average) Deliberately induced sky-reflected glare, as by casting a beam upward for advertising purposes, is specifically prohibited without the issuance of a temporary sign permit.

View official code

Official source re-checked September 8, 2026: no newer edition of the code had been published (publisher’s edition: current through Ordinance 2931 NCS, passed July 6, 2026).

Full Breakdown

1 foot-candle as an average. 040(D)(1), which governs fixtures shining light directly rather than surfaces reflecting it. The same subsection separately prohibits 'deliberately induced sky-reflected glare, as by casting a beam upward for advertising purposes,' unless a temporary sign permit has been issued for it, closing off search-light-style advertising displays as a workaround to the illumination caps. 120(B), and both sit inside the Performance Standards chapter, so they reach every use and zoning district in the city rather than a single overlay area.

Violations & Fines

Exceeding the 0.3 maximum or 0.1 average foot-candle reflected-glare ceiling, or casting an unpermitted upward advertising beam, is enforceable as a zoning violation under Section 26.020: it is declared a public nuisance and the City Attorney may pursue abatement or an injunction on order of the City Council, with the Zoning Administrator and Building Official responsible for day-to-day enforcement under Section 26.010.

Frequently Asked Questions

What counts as light trespass under Petaluma's zoning code?

Section 21.040(D)(2) treats it as indirect glare: illumination reflected diffusely off a wall or roof onto adjacent property that exceeds 0.3 foot-candles at its peak or 0.1 foot-candle on average, measured at the points set in Section 21.120(B).

Can a business shine a spotlight beam into the sky for advertising in Petaluma?

Not without a temporary sign permit. Section 21.040(D)(2) specifically prohibits 'deliberately induced sky-reflected glare, as by casting a beam upward for advertising purposes' unless that permit has been issued.

Is reflected glare regulated differently from direct lighting glare?

Yes. Section 21.040(D)(1) governs direct glare from fixtures like parking-lot lights, while Section 21.040(D)(2) separately caps indirect glare, meaning light reflecting off a building's own walls or roof onto neighboring property.

What happens if a property exceeds the reflected-glare limit?

It is a zoning violation and public nuisance under Section 26.020, giving the City Attorney authority to seek abatement or an injunction on Council order, with the Zoning Administrator and Building Official enforcing the ordinance under Section 26.010.

Sources & Official References

[1]Petaluma Implementing Zoning Ordinance, Chapter 21

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All Petaluma rules

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