Wash. Admin. Code § 51-55-100
101 Scope and general requirements.
101.2 Scope. The provisions of this code shall apply to the construction, alteration, movement, repair, maintenance and use of any building, structure, or premises within the wildland-urban interface areas in this jurisdiction.
Buildings or conditions in existence at the time of the adoption of this code are allowed to have their use or occupancy continued, if such condition, use or occupancy was legal at the time of the adoption of this code, provided that such continued use does not constitute an egregious danger to life or property.
Buildings or structures moved into or within the jurisdiction shall comply with the provisions of this code for new buildings or structures.
101.4 Retroactivity. The provisions of the code shall apply to conditions arising after the adoption thereof, conditions not legally in existence at the adoption of this code and conditions that, as determined by the code official, constitute an egregious hazard to life or property.
EXCEPTION: | Provisions of this code that specifically apply to existing conditions are retroactive. |
Wash. Admin. Code § 51-55-100