WAC 365-210-110
WAC 365-210-110. Manufactured home installation, on-site work or equipment installation—Homeowner performing work on their own home—Exceptions
(1) The owner of a mobile or manufactured home may install or perform on-site work or equipment installation work on his or her own home without obtaining certification from the department as a certified manufactured home installer if the home is intended for use as the homeowner's primary residence.
(2) The installation, on-site work or equipment installation work must be performed in compliance with chapter 296-150M WAC, Washington installation code.
(3) If the owner of a manufactured home hires any individual or business to assist the owner in the installation, on-site work or equipment installation work, a certified installer is required to be on-site supervising such work and must meet all the requirements of this chapter.
(4) For the purposes of this chapter, an "owner" of a manufactured home does not include a manufactured home dealer, distributor, park owner or manager, or developer who installs or performs on-site work or equipment installation work on a manufactured home intended for resale or rental.