Sammamish does not set a numeric weed-height limit, but its landscaping standards (SDC 21.07.070) prohibit any plant on the King County noxious weed list across required landscape types. Overgrown or hazardous vegetation can be addressed as a public nuisance under SMC 23.30.010. King County's Noxious Weed Control Board independently requires control of regulated noxious weeds countywide.
Sammamish's Development Standards for Landscaping and Irrigation (SDC 21.07.070) repeatedly bar plants on the King County noxious weed list from required landscaping — for example, in Type II, III, VI (bioretention) and VII (vegetated/living roof) landscaping, no plants on the King County noxious weed list are permitted. Beyond development landscaping, there is no separate municipal 'weed ordinance' with a height threshold; instead, weedy or overgrown conditions are handled through the general nuisance framework of SMC 23.30.010, under which all code violations are declared public nuisances. State law RCW Chapter 17.10 (the Washington noxious weed law) and the King County Noxious Weed Control Board impose countywide control obligations for state- and county-listed noxious weeds (such as tansy ragwort, knotweed, and other Class A/B/C weeds), which apply to Sammamish parcels regardless of city code. Property owners are responsible for controlling regulated noxious weeds on their land. The city's emphasis is on preventing invasive, listed species in landscaping rather than policing ordinary lawn weeds.
Listed noxious weeds in required landscaping violate SDC 21.07.070 and are enforced as land-use code violations. County-regulated noxious weeds fall under the King County Noxious Weed Control Board's authority (RCW 17.10), which can issue control notices. Nuisance vegetation is enforced under SMC 23.30.010 with penalties per SMC 23.100.010.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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Sammamish parks, open spaces, trails, and marine areas are open from dawn to 30 minutes after sunset. No one may enter or remain during hours of closure exce...
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Sammamish requires outdoor light fixtures to be fully shielded, pointed downward, and maintained so they cause minimal or no light trespass onto adjacent pro...
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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 out...
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Sammamish does not have a separate garage-sale-sign rule. Directional or event signs are handled under the general temporary-sign provisions. A small A-frame...
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Sammamish regulates political signs content-neutrally as non-commercial temporary signs. On private property a sign may be up to 32 sq ft and 8 ft tall for u...
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Sammamish has no separate tiny-home ordinance. A permanent tiny house on a foundation is treated as a detached ADU, capped at 1,000 sq ft, and the city allow...
Side-by-side rule comparisons with other cities in King County.
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