Ada County, ID Property Maintenance: Property Blight (2026)
Key Facts
- Rule
- Unlawful to create or maintain a public nuisance
- Abatement notice
- 15 days to fix after written notice
- Penalty
- Misdemeanor, daily separate offense
- Cost recovery
- Unpaid abatement costs become a lien
- Exempt
- Property zoned in a rural area district
Summary
Ada County's Nuisance Ordinance, Code section 5-9-3, makes it unlawful to create, cause, maintain, or knowingly allow a public nuisance on property you own, rent, or occupy anywhere in unincorporated Ada County outside rural-zoned land. Blight-style hazards like fire risk, unsafe conditions, or rodent-attracting debris all qualify.
5-9-3: PUBLIC NUISANCE DECLARED UNLAWFUL: It is unlawful for any person to create, cause, maintain or knowingly allow to exist a public nuisance on any premises or real property which the person owns, rents, leases, occupies or has charge or possession of in unincorporated Ada County except property zoned in a rural area district as established by Title 8 of this code. ... PUBLIC NUISANCE: A condition or use of property which is harmful or injurious to, or creates a danger of harm or injury to, the health, safety or welfare of members of the public... including, by way of example: A. A condition or use of premises or property which creates a fire hazard or any traffic or safety hazard to members of the public.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-15: Code current through: Ord. 1018, passed 3-24-2026).
Full Breakdown
Chapter 9 of Title 5, first adopted by Ordinance 236 in 1991 and most recently amended by Ordinance 1014 effective January 20, 2026, is enacted under Article 12, Section 2 of the Idaho Constitution and Idaho Code sections 31-714 and 31-801 to abate conditions that create traffic hazards, fire hazards, health hazards, or other harm to public welfare. Section 5-9-4 defines "public nuisance" broadly as any condition or use of property harmful or injurious to public health, safety, or welfare, and gives two worked examples: a condition creating a fire, traffic, or safety hazard, and unchecked plant growth over one foot that creates fire, sight-obstruction, or rodent-harborage risk.
An official county disposal site, landfill, or transfer station is expressly carved out and cannot itself be deemed a nuisance. Enforcement runs through section 5-9-5: the county serves written notice, by personal service, certified mail, or (if those fail) conspicuous posting on the property, describing the nuisance and giving the owner or occupant fifteen days to abate it before civil or criminal proceedings begin. The notice must also warn that abatement and court costs can be assessed back against the property.
Violations & Fines
Failing to abate within fifteen days exposes the owner, occupant, or person in possession to either civil or criminal proceedings under section 5-9-6, and the county can hire contractors to perform the abatement itself and bill the property owner for those costs plus any investigatory expenses; unpaid costs attach as a lien on the property. A violation of the chapter is a misdemeanor punishable per Idaho Code section 18-113, and every day the nuisance continues counts as a separate offense, so delay compounds exposure quickly.
Frequently Asked Questions
What counts as a "public nuisance" under Ada County's blight ordinance?
How much notice does Ada County give before acting on a blighted property?
Can Ada County put a lien on my property over an unabated nuisance?
Sources & Official References
Other rules in Ada County
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