Environmental Rules in Renton, WA (2026)
5 verified environmental rules for Renton, Washington, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Renton regulates surface water runoff and drainage under RMC 4-6-030, requiring drainage review for development projects and banning illicit discharges into the storm sewer system. The Public Works Administrator enforces the chapter, applying the City's Surface Water Design Manual and King County's standards to protect creeks, streams and groundwater from pollution.
Renton Stormwater and Drainage Rules
Significant RestrictionsRMC 4-6-030.B, .C, .K.1
B. ADMINISTERING AND ENFORCING AUTHORITY: The Administrator of the Public Works Department or their designated representative(s) ("Public Works Administrator") is responsible for the general administration and coordination of this Section... All provisions of this Section shall be enforced by the Public Works Administrator. C. ADOPTION OF SURFACE WATER DESIGN MANUAL: The Surface Water Design Ma...
Erosion Control
RMC 4-4-060.D requires anyone who clears, grades, or disturbs a site to control erosion and sediment so runoff doesn't reach drainage systems or neighboring property. From October 1 through April 30, clearing and grading needs an approved erosion control plan, and a City inspector can issue a stop-work order if silt-laden runoff leaves the site or the plan isn't followed.
Renton Construction Erosion Control Rules
Some RestrictionsRMC 4-4-060.D
D. GENERAL EROSION AND SEDIMENT CONTROL STANDARDS: 1. Erosion and Sediment Control Required: A person who clears, grades or otherwise disturbs a site shall provide erosion and sediment control that prevents, to the maximum extent practicable, the transport of sediment from the site to drainage facilities, water resources and adjacent properties... 4. Approved Erosion and Sediment Control Plan R...
Flood Zones
Renton bans new construction, fill, and residential rebuilding inside designated floodways unless narrow encroachment tests are met, and requires new or substantially improved homes in AE and A1-30 flood zones to sit at least one foot above the base flood elevation.
Renton Flood Hazard Area Rules
Significant RestrictionsRMC 4-3-050.D.5.a; RMC 4-3-050.D.3.d.i(a)
a. Floodways: Encroachments, including fill, new construction, substantial improvements, and construction or reconstruction of residential structures is prohibited within designated floodways, unless it meets the provisions of subsection G4e of this Section, Additional Restrictions within Floodways. ... (a) In AE and A1-30 zones or other A zoned areas where the base flood elevation has been det...
Boat Dock Permits
Renton regulates new and expanded docks and piers under its Shoreline Master Program, RMC 4-3-090.E.7. Applicants must justify the need for a permit, and single-family docks are capped at 80 feet from the ordinary high water mark with strict width and setback limits.
Renton Boat Dock Permit Rules
Some RestrictionsRMC 4-3-090.E.7 (Piers and Docks)
The responsibility rests on the applicant to affirmatively demonstrate the need for the proposed pier or dock in his/her application for a permit, except for a dock accessory to a single family residence on an existing lot. ... Minimum needed to provide moorage for a single family residence, a maximum of one ell and two (2) fingers. Maximum: 80 ft. from OHWM. ... No portion of a pier or dock ma...
Flood Elevation Requirements
Renton requires new and substantially improved buildings in mapped flood hazard areas to raise the lowest floor at least one foot above the base flood elevation, with mechanical equipment held to the same freeboard. Where no BFE data exists, the floor must sit at least two feet above the highest adjacent grade.
Renton Flood Elevation and Freeboard Rules
Some RestrictionsRenton Municipal Code 4-3-050.G.4.d.i(a) and (c)
In AE and A1-30 zones or other A zoned areas where the base flood elevation has been determined or can be reasonably obtained, new construction and substantial improvement of any residential structure shall have the lowest floor, which for the purposes of this Section includes basement or attached garage as described in subsection G4di(e)(4) of this Section, elevated one foot (1') or more above...
Looking for King County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Renton city rules.
Environmental Rules in King County →