Landscaping Rules in Bellevue, WA: What Residents Actually Need to Know
If you live in Bellevue or are thinking about moving there, landscaping rules are one of those things you probably won't think about until they affect you directly. Bellevue has 8 specific rules on the books covering different aspects of landscaping rules, and some of them might surprise you.
Grass Height Limits
Bellevue Municipal Code Chapter 9.06 addresses property nuisances including overgrown vegetation; no specific grass height limit but code enforcement acts on complaints.
Key details: No specific grass: No specific grass height limit in code. Enforcement: Complaint-driven enforcement via BCC 9.06. Invasive Species: Noxious weeds must be controlled RCW 17.10. Penalties: 10-30 day notice typical before fines. Code Standard: Bellevue Code Compliance 425-452-4570.
Contact your local code enforcement office for specific penalty information.
Tree Trimming
Bellevue Land Use Code LUC 20.50 regulates significant tree trimming; street trees in rights-of-way need Transportation Department approval for major pruning.
Key details: Routine Trimming Generally: Routine trimming generally no permit needed. Percent Canopy Removal: 25 percent canopy removal limit per year. Street Trees Need: Street trees need Transportation approval. Landmark Trees Have: Landmark trees have special protections. Topping Discouraged Damaging: Topping discouraged as damaging.
Contact your local code enforcement office for specific penalty information.
Artificial Turf
Artificial turf is generally allowed on Bellevue residential properties but counts as impervious surface for stormwater calculations and may be restricted in critical areas.
Key details: Residential Turf: Artificial turf allowed on residential lots. Surface Classification: Counts as impervious surface for stormwater. Trigger: May trigger mitigation above 2000 sq ft added. Critical Area: Prohibited in critical area buffers. HOA Rule: HOA restrictions may apply.
Contact your local code enforcement office for specific penalty information.
Weed Ordinances
Bellevue property owners must control noxious weeds under RCW 17.10 and King County Noxious Weed Board rules; general weed maintenance enforced via nuisance code.
Key details: Landscaping: Noxious weeds controlled under RCW 17.10. Landscaping: King County Noxious Weed Board enforces. Hours/Times: 14-day response to violation notices. Landscaping: General weeds under BCC 9.06 nuisance code. Pools/Water: Herbicides restricted near water bodies.
Contact your local code enforcement office for specific penalty information.
Rainwater Harvesting
Rainwater harvesting is legal in Bellevue under Washington state policy; rooftop collection for irrigation and non-potable uses is allowed without a water right permit.
Key details: Rainwater Harvesting Legal: Rainwater harvesting legal statewide since 2009. Rain Barrels Under: Rain barrels under ~500 gallons: no permit. Larger Cisterns Need: Larger cisterns need building permits. Potable Reuse Needs: Potable reuse needs health department approval. 1000 Sq Ft: 1000 sq ft roof yields ~600 gal per inch of rain.
Contact your local code enforcement office for specific penalty information.
If you are coming from a city with tighter rules, you will find Bellevue gives residents more flexibility on rainwater harvesting.
Tree Removal & Heritage Trees
Bellevue requires a Clearing and Grading Permit to remove Landmark Trees and trees in Critical Areas; residential lots can remove up to 3 significant trees per 3-year period.
Key details: Permit: 3 significant trees per 3 years without permit. Signage: Significant: 6 inch conifer, 10 inch deciduous. Vegetation: Landmark trees have special protections. Permit: Critical area trees always need permits. Fee: Violation fines up to 5000 dollars per tree.
Contact your local code enforcement office for specific penalty information.
This is one of the stricter rules in Bellevue's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.
Water Restrictions
Bellevue water comes from Cascade Water Alliance and Seattle Public Utilities; no permanent watering day restrictions but voluntary conservation during summer drought advisories.
Key details: Water Source: Cascade: Water source: Cascade Water Alliance / SPU. Prohibitions: No permanent watering day schedule. Voluntary Conservation During: Voluntary conservation during droughts. Free Conservation Kits: Free conservation kits from Bellevue Utilities. Backflow Preventer Annual: Backflow preventer annual testing.
Contact your local code enforcement office for specific penalty information.
Bellevue is more permissive than most cities when it comes to water restrictions. That said, there are still limits.
Native Plants
Bellevue encourages native Pacific Northwest plants through NatureMapping and Salmon-Safe programs; Critical Areas Ordinance often requires native species for mitigation planting.
Key details: Native Plants Encouraged: Native plants encouraged, not mandated. Critical Area Mitigation: Critical area mitigation often requires natives. Water Conservation Rebates: Water conservation rebates available. King Conservation District: King Conservation District native plant sale. Invasive Species Noxious: Invasive species on noxious weed list banned.
Contact your local code enforcement office for specific penalty information.
If you are coming from a city with tighter rules, you will find Bellevue gives residents more flexibility on native plants.
The Bottom Line
Compared to many U.S. cities, Bellevue gives residents more room on landscaping rules. 3 of the 8 rules here are rated permissive. But permissive does not mean unregulated. There are still requirements, and the city does enforce them when violations are reported.
These rules come from Bellevue's publicly available municipal code. For complete penalty schedules, exemption details, and answers to common questions, see the individual ordinance pages throughout this guide.