Skip to main content
CityRuleLookup
Key FactsOrdinance TextFull BreakdownViolationsFAQSourcesMore in Kootenai County

Kootenai County, ID Fence Regulations: Retaining Walls (2026)

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

Key Facts

Permit threshold
Wall over 4 ft above ground
Engineering required
Walls over 4 ft (R404.0)
Under 4 ft
Usually no permit
Governing code
County Title 7, Ch. 1
Applies to
Unincorporated county

Summary

In unincorporated Kootenai County a retaining wall taller than four feet above ground level (unless within a setback area) requires a location/building permit, and any wall over four feet must be engineered under the adopted residential code.

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

A location permit shall be required before the start of construction of an agricultural building, retaining wall greater than 4' above ground level unless within a setback area, or a structure exceeding 200 square feet for which the owner has opted out of the building permitting process.

View official code

Full Breakdown

Kootenai County Title 7 (Building Regulations) requires a location permit before constructing a 'retaining wall greater than 4' above ground level unless within a setback area' (7.1.105.D.1). The county's adopted amendment R404.0 further states that plain concrete and masonry retaining walls are prohibited and engineering is required where the wall is over four feet above grade; all foundation and retaining walls over four feet from footing bottom to wall top must be engineered. Walls four feet or under generally do not need a county permit but still must not create drainage or erosion problems. Site-disturbance grading rules (Chapter 7, Article 7.1) may separately apply to cuts and fills.

Violations & Fines

Constructing a regulated wall without a permit violates Title 7 and LUDC 8.8.603 (misdemeanor); the county may require abatement and assess penalties.

Frequently Asked Questions

How tall can a retaining wall be without a permit?
A retaining wall four feet or less above ground level generally needs no county permit. A wall greater than four feet above ground (outside a setback) requires a location permit and engineering.
Do retaining walls need an engineer?
Yes, when over four feet. County code R404.0 prohibits plain concrete/masonry retaining walls and requires engineered design for walls over four feet from footing to top.

Sources & Official References

Other rules in Kootenai County

Parking Rules: Street Parking LimitsSome RestrictionsNoise Ordinances: Quiet HoursSome RestrictionsHeight LimitsSome RestrictionsNeighbor Fence RulesSome RestrictionsFence Permit RequirementsSome RestrictionsMaterial RestrictionsSome RestrictionsNoise Ordinances: Barking DogsSome RestrictionsAnimal Ordinances: Breed RestrictionsSignificant RestrictionsAnimal Ordinances: Pet LimitsSome RestrictionsAnimal Ordinances: Exotic PetsSome Restrictions

All Kootenai County rules

Compare Kootenai County to another location·View the Idaho fence regulations overview

Get notified when Retaining Walls in Kootenai County, ID changes

We'll email you the moment we detect a change in the code. No spam, unsubscribe anytime.

We'll never sell or share your email. One-click unsubscribe in every email.

See something wrong?

Help us keep this page accurate. If you notice an error or outdated information, let us know.