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Franklin County, WA Environmental Rules: Flood Zones (2026)

Some Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

FEMA flood zone rules in Franklin County, WA, also called floodplain regulations or special flood hazard area (SFHA) rules, determine flood insurance requirements and elevation standards for new construction.

Key Facts

Permit required: Before any construction/fill in special flood hazard area
Administrator: Franklin County building official (floodplain administrator)
Maximum fine: $1,000 per violation
Maximum jail term: 90 days per violation
Variance appeals: Board of County Commissioners, then Superior Court
Governing chapter: Franklin County Code Ch. 15.08

FEMA Flood Zone Lookup

FEMA assigns every parcel in the U.S. a flood-hazard designation on its Flood Insurance Rate Maps (FIRMs). Zones starting with A or V are high-risk Special Flood Hazard Areas where federally backed mortgages require NFIP flood insurance. Zone X indicates moderate-to-minimal risk, where insurance is optional but often recommended. Your specific zone determines insurance cost, build elevation, and permit requirements in Franklin County, WA.

Zone	What it means	NFIP required?
A	High-risk flood area; 1% annual chance flood, no detailed analysis.	Yes
AE	High-risk; same as A but with established Base Flood Elevations.	Yes
AH	High-risk shallow flooding (1-3 ft), usually ponding.	Yes
AO	High-risk shallow flooding (1-3 ft) with sheet flow on sloping terrain.	Yes
V	High-risk coastal zone subject to wave action (no BFE).	Yes
VE	High-risk coastal zone with wave action and established BFEs.	Yes
X (shaded)	Moderate risk; between the 1% and 0.2% annual chance flood.	Recommended
X	Minimal risk; outside the 0.2% annual chance floodplain.	No

Look up Franklin County, WA on the FEMA flood map

FEMA maps update periodically; verify zone before buying flood insurance or building.

Summary

Building or altering anything within a mapped special flood hazard area in unincorporated Franklin County requires a development permit first. The county building official, acting as floodplain administrator, reviews the application; building without one is a misdemeanor punishable by a fine and jail time.

These county ordinances apply to unincorporated areas of Franklin County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

1.All development within special flood hazard areas is subject to the terms of this chapter and other applicable regulations. ... Violations of the provisions of this chapter by failure to comply with any of its requirements (including violations of conditions and safeguards established in connection with conditions), shall constitute a misdemeanor. Any person who violates this chapter or fails to comply with any of its requirements shall upon conviction thereof be fined not more than one thousand dollars ($1,000.00) or imprisoned for not more than ninety (90) days, or both, for each violation, and in addition shall pay all costs and expenses involved in the case. ... Development Permit Required. A development permit shall be obtained before construction or development begins within any area of special flood hazard established in Section 15.08.070. The permit shall be for all structures including manufactured homes, as set forth in the definitions, and for all development including fill and other activities, also set forth in the definitions.

View official code

Full Breakdown

08, Flood Damage Prevention, applies to every area of special flood hazard identified on the county's FEMA Flood Insurance Rate Maps. 130 requires a development permit before any construction or development begins, covering all structures, including manufactured homes, and all development activity such as fill placement. 140, and for projects that need a non-building approval such as a shoreline permit or subdivision, to the Planning Director instead. Applicants must supply elevation data, floodproofing certifications from a registered engineer or architect where applicable, and, for floodway development, an engineering analysis showing no rise in base flood elevation.

080 makes compliance mandatory: no structure or land may be constructed, extended, converted or altered within a special flood hazard area without full compliance with the chapter, and violations, including failing to comply with a noncompliance notice, constitute a misdemeanor. 330. 230 to situations with good cause, exceptional hardship, and no resulting increase in flood heights or public risk.

Violations & Fines

Building, extending, converting or altering a structure in a special flood hazard area without a development permit, or without full compliance with Chapter 15.08, is a misdemeanor under Section 15.08.080. Conviction carries a fine of up to $1,000, imprisonment of up to 90 days, or both, per violation, plus all costs and expenses of the case. Franklin County may also pursue any other lawful remedy to stop or correct the violation.

Frequently Asked Questions

Do I need a permit to build in a flood zone in unincorporated Franklin County?

Yes. Franklin County Code Section 15.08.130 requires a development permit before any construction, fill, or other development begins in an area of special flood hazard, whether it is a new structure, an addition, or a manufactured home placement.

Who reviews floodplain development permit applications?

The Franklin County building official, designated as floodplain administrator under Section 15.08.140, reviews building-related applications; the Planning Director handles projects needing a non-building approval like a shoreline permit or subdivision.

What happens if I build in the floodplain without a permit?

It is a misdemeanor under Section 15.08.080. A conviction carries a fine of up to $1,000, up to 90 days in jail, or both, per violation, and Franklin County can still pursue other lawful action to remedy the violation.

Can I get a variance from Franklin County's floodplain rules?

Only rarely. The Board of County Commissioners decides variance requests under Section 15.08.220 and 15.08.230, requiring good cause, exceptional hardship, and proof the variance will not raise flood heights or endanger public safety.

Sources & Official References

[1]Franklin County Code Ch. 15.08, Flood Damage Prevention

Other rules in Franklin County

Parking Rules: Overnight ParkingSome Restrictions Parking Rules: Street Parking LimitsSome Restrictions Parking Rules: RV & Boat ParkingSome Restrictions Flood Elevation RequirementsSome Restrictions Defensible SpaceSome Restrictions Stormwater ManagementSome Restrictions Erosion ControlSome Restrictions Noise Ordinances: Barking DogsLight Restrictions Parking Rules: Driveway RulesSome Restrictions Fence Regulations: Material RestrictionsSignificant Restrictions

All Franklin County rules

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