Renton, WA Outdoor Lighting: Light Trespass & Shielding (2026)
Key Facts
- Core rule
- No light trespass beyond property lines, RMC 4-4-075.E
- Reaches existing lighting
- Nuisance complaints trigger enforcement, RMC 4-4-075.B
- Survives modifications
- Trespass still banned even with alternative shielding
- Fully exempt uses
- Right-of-way, stadium, park, sports field lighting
- Relief option
- Variance under RMC 4-4-075.H, appeal via RMC 4-8-110
Summary
Renton flatly bars any use or activity from causing light trespass beyond a property's boundary lines, and the rule reaches existing residential lighting that creates a nuisance for neighbors, not just new fixtures, under RMC 4-4-075.
A. PURPOSE: The purpose of these regulations is to provide for ample but not excessive illumination levels, promote the general public health, welfare, and safety, to discourage light trespass beyond the boundaries of the property on which the light is located... B. APPLICABILITY: The standards of this Section shall apply to the addition or replacement of light fixtures. Additionally, the standards of this Section apply to remedy existing residential lighting that creates nuisances to abutting properties per chapter 1-3 RMC... E. STANDARDS: No use or activity shall cause light trespass beyond the boundaries of the property lines. ... G. MODIFICATIONS OF STANDARDS: ...In any case, no use or activity shall cause light trespass beyond the boundaries of the property lines.
Official source re-checked September 8, 2026: no newer edition of the code had been published (publisher’s edition: current through Ordinance 6197, passed August 10, 2026).
Full Breakdown
A states the regulations exist to provide ample but not excessive illumination while discouraging light trespass beyond the boundaries of the property on which the light is located. B extends this beyond new construction: while the section's standards generally apply to the addition or replacement of light fixtures, they also apply to remedy existing residential lighting that creates nuisances to abutting properties under chapter 1-3 RMC, meaning a neighbor's complaint about an already-installed light can trigger enforcement even without any permit application. C4-C5. H, appealable under RMC 4-8-110.
Violations & Fines
Causing light trespass beyond a property's boundary lines violates RMC 4-4-075.E outright, with no shielding modification able to excuse it under RMC 4-4-075.G. Existing residential lighting that becomes a nuisance to abutting properties can be pursued as a nuisance violation under chapter 1-3 RMC even without a new permit application, and general code violations are punishable as a misdemeanor under RMC 1-3-1.
Frequently Asked Questions
Can my neighbor complain about my outdoor lights shining onto their yard?
Is there any exception that lets light spill onto a neighbor's property?
Does holiday lighting have to stay on my own property in Renton?
What if I truly cannot meet the no-trespass standard?
Sources & Official References
Other rules in Renton
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Light Trespass & Shielding in Nearby Cities
How other cities in King County handle light trespass & shielding.