(Check here to see if the the work to be performed will need permits) Manufactured home are under the jurisdiction of the Dept. of Labor and Industries.
There is no official definition of “tiny home”. All “tiny homes” in Washington must meet either the State Building Code requirements (RCW 19.27.031), Park Model RV (PMRV) requirements, the Recreational Vehicle (RV) requirements (RCW 43.22.340) or the HUD Manufactured Home Construction and Safety Standard (CFR 3280) depending on how it will be used and constructed.