Environmental Rules in Redmond, WA (2026)
4 verified environmental rules for Redmond, Washington, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Redmond is an NPDES Phase II city and enforces Department of Ecology stormwater standards. Development over 2,000 sf of new or replaced impervious surface must mitigate runoff.
Redmond Stormwater Rules
Heavy RestrictionsErosion Control
Redmond requires construction-phase erosion and sediment control BMPs on any ground disturbance over 2,000 sf under RMC Title 15 and the DOE Stormwater Manual, with daily inspection during wet season.
Redmond Erosion and Sediment Control Rules
Heavy RestrictionsFlood Zones
Redmond participates in the NFIP and regulates construction in FEMA Special Flood Hazard Areas along Bear Creek, Evans Creek, and the Sammamish River. Critical areas code adds 1-2 ft freeboard.
Redmond Flood Zone Rules
Heavy RestrictionsGrading & Drainage
Redmond requires a grading permit for earthwork over 50 cubic yards or grading in critical areas under RMC Title 15, with drainage review by Public Works based on the DOE Stormwater Manual.
Redmond Grading and Drainage Rules
Some RestrictionsLooking for King County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Redmond city rules.
Environmental Rules in King County →