Official sources checked August 30, 2026

Kitsap County, Washington septic permits and requirements

Washington state/local framework

Washington Department of Health assigns approval authority for onsite sewage systems with design flows through 3,499 gallons per day to the local health officer. Local health jurisdictions therefore administer the property-level permit, inspection, and management process, while larger systems can fall under state jurisdiction.

Local permitting authority

Kitsap Public Health states that it regulates onsite sewage systems in Kitsap County. Its current local ordinance, effective March 17, 2025, incorporates Washington’s revised onsite-sewage rule and establishes local permitting, installation, inspection, use, monitoring, and maintenance requirements.

New drainfields and major repairs use a designer-to-installer process

Kitsap instructs owners needing a new drainfield to hire a licensed septic designer to prepare and submit a Building Site Application showing the proposed size, type, and location. After approval, a certified septic installer obtains the installation permit and installs the system according to the approved design.

Inspection before cover and use

Kitsap states that a Health District employee inspects the installed system before it is covered. The current ordinance also requires Health Officer approval before a constructed, expanded, altered, modified, repaired, replaced, new, or existing onsite system is placed in use.

Building projects can require separate septic clearance

Kitsap requires Residential or Commercial Building Clearance when a project involving an existing septic system needs Health District approval for the building permit. A separate Connection Permit may also be required when connecting a new structure or changing which structure is connected to the system.

Property conveyance inspection

Kitsap directs buyers and sellers to obtain a Property Conveyance Inspection before final sale of a septic-served property. The District reviews the system and provides a written report; if no record drawing exists, the District states that one must be created for the conveyance inspection.

Maintenance obligations

Kitsap states that gravity systems should be inspected every three years by a septic service professional certified by the Health District. Alternative systems require at least annual inspection, and the owner must maintain an annual contract with a certified monitoring-and-maintenance specialist.

Current fees

Kitsap Public Health Board approved an updated Environmental Health fee schedule effective January 1, 2026 covering onsite-sewage permitting and related services. Because fees vary by service and are maintained on the District’s live schedule, applicants should confirm the current amount before filing.

Official sources

• Washington State Department of Health — Regulatory Jurisdiction
• Washington State Department of Health — On-Site Sewage Systems
• Kitsap Public Health — Septic System Construction, Repairs & Maintenance
• Kitsap Public Health — Selling Property Served by Septic & Water
• Kitsap Public Health — Residential Building Clearances
• Kitsap Public Health Board Ordinance 2025-01
• Kitsap Public Health — 2026 Environmental Health Fees

SepticScope summarizes public-agency information for planning purposes. The permitting agency's current instructions control if they differ from this guide.