ADU site plans and permitting
The free county plan covers the building. Your permit also needs a site plan for your lot, and that's where most corrections come from. We draw it, submit the permit and answer the reviewer's comments.
What the site plan includes
- A scaled drawing with north arrow, address and parcel number
- Property lines and easements, from a survey or County GIS
- Existing buildings and the proposed ADU, with dimensioned setbacks
- Sewer or septic route, water, and power
- Stormwater: downspouts, infiltration or dispersion, and new hard surface area
- Driveway, access and any required parking
- Critical areas and buffers: wetlands, streams, steep slopes, shoreline
- Lot coverage and floor area calculations
What we do on the permit
- Parcel check (free). Zoning, urban growth boundary, sewer or septic, critical areas, and which plans qualify.
- Plan set. We request the county plan set or line up a licensed plan.
- Site plan. Drawn to your jurisdiction's submittal checklist.
- Other approvals. Kitsap Public Health septic review, utility letters, and a Conditional Use Permit on rural lots that use a county plan.
- Submittal. We prepare and submit the application through the jurisdiction's portal.
- Review. We track it and answer reviewer comments until the permit is issued.
Price and timeline
We quote the site plan and permit package after the free parcel check, with a timeline for your jurisdiction. Permit, impact and connection fees are paid to the jurisdiction; for the county plans in unincorporated Kitsap the county publishes approximate permit fees:
| Plan | Size | Approx. county permit fee |
|---|---|---|
| The Lille | 480 SF | $4,666.50 |
| The Sidney | 600 SF | $5,120.29 |
| The Sinclair | 800 SF | $5,847.15 |
| The Blakely | 800 SF | $5,770.24 |
| The Kitsap | 834 SF | $7,235.45 |
| The Salish | 1,000 SF | $6,593.72 |
Who does the work: Laughlin Development LLC, which handles land development and entitlements on the Kitsap Peninsula.
Step 3 · Site plan
Will it fit on your lot?
Enter your lot and house, then drag the ADU into place. This is a quick test fit. Our site plan adds survey or County GIS lines, utilities, driveway, parking, drainage and critical areas, drawn to your jurisdiction's checklist.
Questions
Site plan FAQ
What does a site plan cost?
We quote it after the free parcel check, because the work depends on the lot: whether there's a survey, sewer or septic, slopes and critical areas.
How long does it take?
It depends on the lot and the jurisdiction's review queue. We give you a timeline with the quote and track the permit through review.
Do I need a survey?
Not always. Many ADU site plans can be drawn from County GIS and measurements. Lots near setback limits, critical areas or shorelines often need a survey; we tell you up front.
Do you work with plans from other architects?
Yes. The site plan and permit package work the same for a county plan, a licensed plan or a custom design.