Outdoor Lighting in Sammamish, WA (2026)
2 verified outdoor lighting rules for Sammamish, Washington, sourced directly from the municipal code and official government pages.
Verified from official government sources
Dark Sky Rules
Sammamish requires outdoor light fixtures to be fully shielded and pointed downward, and caps outdoor lighting at 5.0 lumens per square foot of hardscape outside the building. Limited accent and overhang lighting is allowed within stated lumen caps.
Sammamish Outdoor Lighting / Dark Sky Rules
Some RestrictionsLight Trespass
Sammamish requires outdoor light fixtures to be fully shielded, pointed downward, and maintained so they cause minimal or no light trespass onto adjacent properties. Outdoor lighting is also capped at 5.0 lumens per square foot of hardscape.
Sammamish Light Trespass Rules
Some RestrictionsLooking for King County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Sammamish city rules.
Outdoor Lighting in King County →