Showing ordinances that apply to Mirrormont, WA
Mirrormont is an unincorporated community (population 3,858) in King County, Washington. Because Mirrormont is not an incorporated city, it does not have its own municipal code. Instead, King County ordinances apply directly to properties here. The flood zones rules below are the ones that govern your area.
Floodplain development in King County is regulated under KCC 21A.24 and FEMA NFIP. SFHAs require elevated construction to BFE plus 1 foot freeboard, flood vents, and development permits.
King County participates in the National Flood Insurance Program (NFIP) and regulates floodplain development under KCC 21A.24 (Critical Areas) Part 6 — Flood Hazard Areas. Flood Insurance Rate Maps (FIRMs) issued by FEMA identify Special Flood Hazard Areas (SFHAs) — Zones A, AE, AH, AO, VE, and V representing areas with 1 percent annual chance of flooding (100-year floodplain). Major flood-prone rivers in King County include the Snoqualmie River (particularly Carnation, Duvall, and Fall City), Green River (Tukwila, Kent, Auburn valley floor), Cedar River (Renton), Sammamish River, White River, and Skykomish tributaries. Puget Sound coastal areas have V zones subject to wave action. Development in SFHAs requires a floodplain development permit under KCC 21A.24. New structures must be elevated with the lowest floor at or above the Base Flood Elevation (BFE) plus 1 foot freeboard for King County. Fully enclosed areas below BFE must have flood vents (minimum 1 square inch per square foot of enclosed area). Critical facilities (hospitals, schools, emergency services) face stricter 500-year flood protection. Substantial improvement or substantial damage (over 50 percent of structure value) triggers full current-code compliance for the entire structure. Fill in the floodway is generally prohibited — the floodway is the river channel and adjacent areas reserved for flood flow. The King County Flood Control District funds levee maintenance, home buyouts, and flood warning systems. Federal FEMA flood insurance is required for federally-backed mortgages in SFHAs. King County participates in the Community Rating System (CRS) providing flood insurance discounts.
Floodplain development without permits or below BFE triggers KCC 23 enforcement, required demolition or elevation, and FEMA sanctions that can remove King County from NFIP (making flood insurance unavailable). Substantial damage determinations require full code compliance. Critical area violations face penalties up to 10,000 dollars per day.
See how Mirrormont's flood zones rules stack up against other locations.
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