Pierce County, WA Environmental Rules: Boat Dock Permits (2026)

8 lets a homeowner build a private, noncommercial dock for pleasure craft without a full Shoreline Substantial Development (SD) Permit, but only within specific dollar thresholds. A dock counts as a landing and moorage facility only; recreational decks, storage facilities, and other appurtenances aren't covered by the exemption and are priced separately. The salt-water threshold is $2,500 in fair market value; fresh-water new construction tops out at $10,000; and replacing an existing dock with one of equal or smaller square footage is capped at $20,000.

These dollar figures track the state exemption schedule and are adjusted for inflation by the Office of Financial Management every five years. The exemption is also time-limited: if a second phase of construction on the same dock happens within five years of finishing the first phase, and the combined fair market value of both phases exceeds the applicable cap, the whole project retroactively becomes a substantial development requiring an SD Permit. Even an exempt dock isn't unregulated. D, the applicant carries the burden of proving the project meets the exemption's precise terms, an administrative review still applies to confirm compliance, and any doubt about whether the project fits the exemption defaults to requiring the full SD Permit.

Exempt work must still meet all other Title 18S standards (buffers, environment designation policies) and any applicable Title 18E critical-area rules, and cannot begin construction until every other required local, state, and federal permit is in hand. Permits and pre-application review run through Pierce County Planning and Public Works (PPW).