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Lewis County, WA Building Setbacks & Zoning: Setback Rules (2026)

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

Key Facts

60-ft ROW or less
55 ft from right-of-way centerline
ROW wider than 60 ft
25 ft from right-of-way edge
Alleys
exempt from the 55-foot rule
'Building' excludes
fences and signs
Reduced setback
needs county engineer approval
Appeals
go to Lewis County hearing examiner

Summary

Outside the incorporated cities and small-town urban growth areas, LCC § 15.15.040 sets a minimum building setback of 55 feet from the centerline on any county road right-of-way 60 feet wide or less, and 25 feet from the edge of any right-of-way wider than 60 feet. The county engineer can approve a reduced setback where topography or an unlikely-to-expand road justifies it.

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

Minimum Setback, 60-Foot Right-of-Way. Except as otherwise stated in Chapter 17.15 LCC, Urban Growth Areas - Cities, or Chapter 17.17 LCC, Urban Growth Areas - Small Towns: ... The minimum building setback from any county road right-of-way, 60 feet in width or less, shall be 55 feet from the right-of-way centerline, as established by the records of the Lewis County engineer; provided, that this standard shall not apply to an alley. ... Minimum Setback, Greater Than 60-Foot Right-of-Way. Except as otherwise stated in Chapter 17.15 LCC, Urban Growth Areas - Cities, or Chapter 17.17 LCC, Urban Growth Areas - Small Towns, the minimum building setback from any county road right-of-way greater than 60 feet in width shall be 25 feet from the near edge of the road right-of-way as established by the records of the Lewis County engineer.

View official code

Full Breakdown

030. 020(3). 040(1) fixes the standard: on a right-of-way 60 feet wide or less, the building must sit at least 55 feet back from the right-of-way centerline as shown in the Lewis County engineer's records, though the rule does not apply to alleys; where only half of the right-of-way has been built out, the 55 feet is measured from the planned center of the full right-of-way. 040(2) instead requires 25 feet from the near edge of the right-of-way. 145 LCC or the International Building and Residential Code tables.

040(4) for a reduced setback; the engineer weighs the road's functional classification, sight distance under WSDOT's Design Manual, and future expansion plans before granting one. 25 LCC.

Violations & Fines

Constructing, erecting, or beginning construction of any structure that violates the Chapter 15.15 setback subjects the responsible party to the penalties in LCC §§ 1.20.020 and 1.20.040, Lewis County's general code enforcement provisions: a notice of violation, an opportunity to contest before the hearing examiner, and a civil penalty of up to $250 per day for as long as the violation continues, in addition to any required correction of the structure's placement.

Frequently Asked Questions

How far back from the road must I build in unincorporated Lewis County?
If the county road right-of-way is 60 feet wide or less, LCC § 15.15.040(1) requires your building to sit at least 55 feet from the right-of-way centerline. If the right-of-way is wider than 60 feet, § 15.15.040(2) instead requires 25 feet from the near edge of the right-of-way.
Do fences and signs have to meet this setback?
No. LCC § 15.15.020(3) defines 'building' for this chapter to cover residential, outbuilding, and commercial or industrial structures, but expressly states the term does not mean any fence, sign, or similar structure, so those improvements are not subject to the Chapter 15.15 road setback.
Can I get a smaller setback if my lot is oddly shaped?
Yes. Under LCC § 15.15.040(4), the county engineer may approve a reduced setback where topography or existing conditions make the standard distance impractical, weighing factors like the road's functional classification, sight-distance standards from WSDOT's Design Manual, and whether the road is likely to need future expansion, before deciding.
What happens if I build too close to the road?
You are subject to the penalties in LCC §§ 1.20.020 and 1.20.040, referenced in § 15.15.060, which can include a notice of violation, a hearing before the county, and a civil penalty of up to $250 for every day the violation continues.

Sources & Official References

Other rules in Lewis County

Fence Regulations: Height LimitsSome RestrictionsLot Coverage LimitsSome RestrictionsStructure Height LimitsSome RestrictionsNoise Ordinances: Barking DogsSome RestrictionsFence Regulations: Fence Permit RequirementsSome RestrictionsAnimal Ordinances: Pet Groomer RulesFew RestrictionsAnimal Ordinances: MicrochippingSignificant RestrictionsAnimal Ordinances: Breed RestrictionsSignificant Restrictions

All Lewis County rules

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