Unincorporated Kitsap County, Washington requires a building permit for most construction through the county's Department of Community Development (DCD)1. Kitsap County also zones unincorporated land, while the Kitsap Public Health District separately reviews, permits, and inspects on-site sewage systems23. A new driveway connecting to a public road also requires county access review4.
At a glance
- Building permit
- Required for most construction in unincorporated Kitsap County; apply online through DCD's Permit Application Portal1
- Zoning
- Yes; Kitsap County regulates land use throughout the unincorporated county2
- Septic permits
- Kitsap Public Health District requires approval before installation and inspects before cover356
- Owner-builder exemption
- Available from contractor registration for work on your own property, but not work done to sell, lease, or demolish7
- Tiny home on your land
- Allowed up to 400 square feet if built to the state building code, but siting still needs local building department approval8
- Driveway access
- A new driveway or significant change connecting to a public road requires county access review4
Who to call
Building permits
Kitsap County Department of Community Development (DCD)
Building permits, plan review, inspections, and zoning administration for unincorporated Kitsap County
619 Division St., 2nd Floor, Port Orchard, WA 98366
Building permits
Kitsap County DCD — Permit Services (process details)
Kitsap County DCD's own published permit-process steps: applying, inspections, permit expiration and renewal
Zoning
Kitsap County DCD — Community Planning (Zoning)
Administers Kitsap County's zoning code (Title 17) and zoning district/density classifications for unincorporated land
Septic permits
Permits, inspects, and regulates on-site septic (OSS) systems for unincorporated Kitsap County, separate from DCD
345 6th Street, Bremerton, WA
Contact details are copied from each office’s official page and were checked against it on September 29, 2026.
Do you need a building permit in Kitsap County, Washington?
Yes. Kitsap County's Department of Community Development requires a permit for most construction in unincorporated Kitsap County1. A building permit remains active for 180 days after the last approved inspection, and each new building inspection extends that period another 180 days9. Permits older than six years or more than two code cycles must be reapplied for under current codes9. Washington's state building code applies throughout the county, with local enforcement by DCD10. The owner-builder exemption can remove the contractor-registration requirement when you work on your own property, but it does not erase building, electrical, plumbing, septic, or other permit requirements and does not cover work undertaken to sell, demolish, or lease the property7.
Who is the Kitsap County building department, and how do you reach them?
Kitsap County's Department of Community Development (DCD) handles building permits, zoning, and land-use review for unincorporated Kitsap County11. Reach DCD at (360) 337-5777 or [email protected]; Permit Technician assistance is available Monday through Thursday, 9 a.m. to noon11. The office is at 619 Division St., 2nd Floor, Port Orchard, WA 98366, with lobby hours Monday through Friday, 9 a.m. to noon11. Schedule building inspections through the Online Permit Center or by calling (360) 337-5777 with the permit number; most are scheduled within two business days9. Septic review and inspections belong to the Kitsap Public Health District rather than DCD3.
Does Kitsap County have zoning?
Yes. Kitsap County regulates land use throughout the unincorporated county2. Rural Residential allows 1 dwelling unit per 5 acres, Rural Protection 1 per 10 acres, Rural Wooded 1 per 20 acres, and Forest Resource Lands 1 per 40 acres12. Those figures are zoning densities, not a promise that every parcel can be divided or built on. Kitsap County separately regulates subdivisions, short subdivisions, and large-lot subdivisions, with different rules inside and outside Urban Growth Areas13. Ask DCD to confirm the parcel's zone, development constraints, and applicable land-division path before relying on acreage alone12.
How do septic permits work in Kitsap County?
Kitsap Public Health District handles on-site sewage review, permitting, and inspection in Kitsap County3. For a new system, the Building Site Application must be approved before a certified septic installer applies for the installation permit5. The district inspects a new system before it is covered; a new or reconnected line to an existing system also needs a connection permit and must remain uncovered for inspection56. Reach the district at 360-728-2007 or 345 6th Street, Bremerton, WA14. Only 6.3% of Kitsap County's soil is rated free of severe limits for a conventional drain field, so do not assume a standard system will fit the parcel15. Kitsap County also requires a development proposal to show how the property will receive water and handle sewage16.
Can you live in an RV or tiny home on your land in Kitsap County?
We could not confirm a county rule that allows long-term RV occupancy or temporary camping on private land in unincorporated Kitsap County, so ask DCD about the parcel and proposed use before moving in11. Washington's statutory RV definition describes temporary, transient living quarters that are not occupied as a primary residence, but that definition does not itself authorize an RV residence on private land17. A tiny house may be built on wheels, may be no larger than 400 square feet, and must meet the Washington State Building Code; its location, foundation, installation, and permits remain subject to local review8. We could not confirm a Kitsap County-specific tiny-home occupancy rule or county minimum dwelling size, so take the proposed structure and parcel details to DCD11.
Building a home in Kitsap County: the steps, in order
- Confirm the parcel's zoning and whether a proposed land division is a subdivision, short subdivision, or large-lot subdivision213.
- Show how the property will receive water and handle sewage16.
- If the parcel needs septic, obtain approval of the Building Site Application before the certified installer seeks the installation permit5.
- Apply to DCD for the building permit required for most construction1.
- Include driveway access in the building review; for early access to install utilities, septic, or a well, ask about a stand-alone Road Approach Permit4.
- Schedule building inspections through the Online Permit Center or at (360) 337-5777 with the permit number9.
- Keep the septic installation or connection uncovered until the Health District completes its inspection6.
What to check before you buy land in Kitsap County
Start with water, sewage, and legal access. Kitsap County requires a development proposal to show how the property will receive water and handle sewage16. Only 6.3% of county soil is rated free of severe limits for a conventional drain field, so make septic feasibility a purchase contingency rather than assuming a standard system will work15. A new driveway or significant change to an existing driveway connecting to a public road requires a Driveway Permit, typically reviewed with the building permit; work in county right-of-way can require additional approvals4. About 70.5% of county land has a slope of 15% or less, while 64.6% is wooded, so parcel-level topography and clearing needs matter1819. If the property is in a floodplain, Washington requires a local floodplain development permit20. Confirm zoning and any proposed division with DCD before closing213.
Watch-outs
- A zoning density does not guarantee that acreage can be divided: Kitsap County applies separate subdivision and short-subdivision rules13.
- There's no confirmed answer on long-term RV living in unincorporated Kitsap County; call DCD before you set one up as a residence11.
- Do not cover a new septic system or qualifying connection before the Kitsap Public Health District inspection6.
Sources
- Kitsap County DCD - Permit Services (2026 county census)
- Kitsap County Zoning, quoted and re-checked
- Septic System Construction, Repairs & Maintenance, quoted and re-checked
- Build or Modify My Road or Driveway, quoted and re-checked
- Septic System Construction, Repairs & Maintenance, quoted and re-checked
- Septic System Construction, Repairs & Maintenance, quoted and re-checked
- RCW 18.27.090 — Exemptions, quoted and re-checked
- Tiny Houses (Washington statewide rule), quoted and re-checked
- Kitsap County DCD — Permit Services (process details) (kitsap.gov)
- RCW 19.27.031 — State building code—Adoption—Conflicts—Opinions (Washington statewide rule), quoted and re-checked
- Kitsap County Department of Community Development (DCD) (kitsap.gov)
- Kitsap County DCD — Community Planning (Zoning) (kitsap.gov)
- Divide and Develop My Land, quoted and re-checked
- Kitsap Public Health District (kitsappublichealth.org)
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Before You Buy or Build, quoted and re-checked
- RCW 59.30.020 — Definitions (Washington statewide rule), quoted and re-checked
- Share of land at 15% slope or less: Bolthole Index county data
- Wooded share of land: Bolthole Index county data
- Planning & regulation — Washington State Department of Ecology (Washington statewide rule), quoted and re-checked
Written September 29, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.