Wash. Rev. Code § 64.90.245
(6) The map for a common interest community must be clear and legible and must contain:
(8) Each map prepared for a common interest community in compliance with this chapter, and any amendments to the map, must show or state:
(15) In showing or projecting the location and dimensions of the vertical boundaries of a unit located in a building, it is not necessary to show the thickness of the walls constituting the vertical boundaries or otherwise show the distance of those vertical boundaries either from the exterior surface of the building containing that unit or from adjacent vertical boundaries of other units if:
[ 2019 c 238 s 207; 2018 c 277 s 210.]