Kennewick ADU Permits & Apartment Inspections Guide

Housing and Building Standards Washington 3 Minutes Read · published March 09, 2026 Flag of Washington

This guide explains accessory dwelling unit (ADU) permitting and apartment inspection processes in Kennewick, Washington. It summarizes which city departments handle permits and enforcement, where to find official rules and forms, and the typical steps property owners and managers must follow to comply with building and habitability standards. Use the links to the City of Kennewick pages and the municipal code for official requirements and to start an application.[1]

Permits and Approvals

Most ADU and apartment changes that affect structure, egress, fire safety, plumbing, mechanical, or electrical systems require a building permit and review by Kennewick Community Development - Building Services. Planning review may be needed for zoning, lot coverage, parking, and ADU-specific standards. Begin by contacting Building Services for submittal requirements and a permit checklist.[1]

Apply early—site or plan reviews can add weeks to a project timeline.

Inspections and Compliance

Inspections for permits are scheduled through Building Services; inspectors confirm code compliance for work performed under an issued permit. Habitability or sanitation complaints for rental units may be handled by Code Enforcement or by the applicable health authority; jurisdiction depends on the issue type.

  • Apply for permit: submit plans and application to Building Services.[1]
  • Schedule inspections: building, plumbing, mechanical, electrical as required by the permit.
  • Report unsafe units: contact Code Enforcement or the Building Official for immediate hazards.

Penalties & Enforcement

Enforcement of building, zoning, and property-maintenance requirements in Kennewick is carried out by Community Development (Building Services and Code Enforcement) and, where applicable, by external health or fire jurisdictions. The Kennewick municipal code and the City departments referenced below govern citations, orders, and remedies.[2]

  • Fines: specific monetary penalties are not specified on the cited municipal-code page; refer to the City Enforcement or Code sections for current amounts.[2]
  • Escalation: first, repeat, and continuing offence procedures and escalation ranges are not specified on the cited page.
  • Non-monetary sanctions: orders to correct, stop-work orders, permit revocation, or court actions may be imposed under city code.[2]
  • Enforcer and inspections: Building Official and Code Enforcement handle inspections and enforcement; complaints may be submitted via the City contact pages.[1]
  • Appeals and review: appeal routes are described in the municipal code or departmental rules; specific time limits for appeals are not specified on the cited page and should be confirmed with the City.[2]
  • Defences and discretion: permitted variances, building permits, or demonstrated mitigation measures can affect enforcement discretion; check permit and variance procedures with Planning and Building Services.
If you receive a notice, follow the correction order promptly to avoid escalation.

Applications & Forms

The City publishes permit applications and checklists through Building Services; application names and fees are provided on the City permit pages and in-person at the Community Development counter. Fee amounts and specific form numbers are not specified on the cited page and should be verified with Building Services before submission.[1]

How-To

  1. Prepare plans: include floor plans, site plan, and code compliance notes.
  2. Submit application: file with Building Services using the City portal or by delivering hard copies if required.[1]
  3. Pay fees: pay permit and plan-review fees as calculated by Building Services.
  4. Schedule inspections: request inspections as work progresses; obtain final approval before occupancy.
Do not occupy an ADU before final inspection and approval if changes required a building permit.

FAQ

Do I need a permit to build an ADU in Kennewick?
Yes. Structural, mechanical, plumbing, electrical, and many conversions require a building permit and likely planning review; contact Building Services for the exact scope.[1]
Who inspects apartment units for health and safety?
Inspections tied to building permits are performed by the City Building Inspectors; habitability or public-health issues may be handled by Code Enforcement or the local health authority depending on the complaint.
What happens if I rent an ADU without a permit?
Unpermitted occupancy can lead to stop-work orders, orders to correct, fines, or other enforcement actions per the municipal code; specific penalties are not specified on the cited page.

Key Takeaways

  • Always check with Building Services and Planning before starting ADU or apartment work.[1]
  • Inspections must be scheduled and passed prior to final occupancy.

Help and Support / Resources

  1. [1] City of Kennewick Building Services - Permits and Inspections
  2. [2] Kennewick Municipal Code - Code of Ordinances
  3. [3] City of Kennewick Planning Division - Zoning and ADU guidance

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