Environmental Rules in Port Townsend, WA (2026)
7 verified environmental rules for Port Townsend, Washington, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Port Townsend requires all developments to meet Washington's 2005 Stormwater Management Manual for Western Washington, submit a drainage plan, and keep runoff on natural drainage paths under PTMC 13.32.
Port Townsend Stormwater Drainage Standards
Some RestrictionsPTMC 13.32.010
All developments shall comply with the Department of Ecology's February 2005 Stormwater Management Manual for Western Washington ("2005 SWMM-WW"), except for the following: Section 2.6 – Optional guidance, relating to financial liability and off-site analysis and mitigation, city engineering design standards, city stormwater master plan, and adopted drainage basin plans for all clearing and gra...
Erosion Control
Port Townsend requires construction sites to follow the state stormwater manual's erosion control standards, with temporary sediment control measures required for site prep and larger impervious surfaces.
Port Townsend Construction Erosion Control
Some RestrictionsPTMC 13.32.010(A)
All developments shall comply with the Department of Ecology's February 2005 Stormwater Management Manual for Western Washington ("2005 SWMM-WW")... for all clearing and grading activities, for erosion control during construction and for permanent drainage system improvements.
Flood Zones
Any construction or development in Port Townsend's special flood hazard area needs a floodplain development permit before work starts.
Port Townsend Floodplain Development Permit
Some RestrictionsPTMC 16.08.120
A. Construction or development shall not be undertaken within any area of special flood hazard (SFHA) established in PTMC 16.08.070 without approval under this chapter. 1. For development where no other permit or authorization from the city of Port Townsend is necessary to begin or to accomplish the work, the approval shall be documented by issuance of a floodplain development permit. An ...
Boat Dock Permits
New docks, piers, and marinas in Port Townsend need a zoning and critical-area permit, and are barred from critical saltwater habitat unless strict siting and mitigation tests are met.
Port Townsend Dock Permits Near Habitat
Significant RestrictionsPTMC 19.05.080(H)(1)
Structures, developments, and uses, including marinas, docks, piers, mooring areas, underwater parks, utilities, and shoreline modifications, shall not intrude into or be built over critical saltwater habitat unless the applicant can show that all of the following criteria can be met: a. An alternative alignment or location is not feasible. b. The project is designed to minimize its impac...
Defensible Space
Port Townsend adopted the 2021 International Wildland-Urban Interface Code by reference under PTMC 16.04.020(E), requiring defensible-space vegetation clearance around new construction in wildfire-prone areas, enforced by the planning and community development director.
Port Townsend Wildfire Defensible-Space Code
Some RestrictionsPTMC 16.04.020(E)
E. The International Wildland Urban Interface Code, 2021 Edition, published by the International Code Council, as amended by the Washington State Building Code Council in Chapter 51-55 WAC, and as subsequently amended by this chapter. F. The Uniform Plumbing Code, 2021 Edition, published by the International Association of Plumbing and Mechanical Officials, as amended by the Washington State...
Vehicle Idling Restrictions
Port Townsend caps vehicle idling at three minutes citywide, with exceptions for traffic stops, extreme temperatures, and emergency or repair work.
Port Townsend 3-Minute Idling Limit
Some RestrictionsPTMC 10.08.040
No driver, while operating a vehicle within city limits, shall cause or permit a vehicle's internal combustion engine to idle for more than three minutes, except for the following kinds of idling... Idling as needed for the health or safety of a driver or passenger... or when the temperature is at or below 30 degrees Fahrenheit or at or above 85 degrees Fahrenheit.
Flood Elevation Requirements
Port Townsend requires new and substantially improved residential structures in flood hazard areas to elevate the lowest floor at least two feet above base flood elevation, exceeding FEMA's minimum standard.
Port Townsend: 2-Foot Freeboard Above Base Flood
Some RestrictionsPTMC 16.08.170(A)(1)
In all special flood hazard areas (SFHAs) where base flood elevation data has been provided as set forth in PTMC 16.08.070 or 16.08.150(B), the following provisions are required: A. Residential Construction. (For manufactured homes see subsection (E) of this section.) 1. New construction and substantial improvement of any residential structure shall have the lowest floor, including baseme...