I have a covenants and conditions on my mobile home and want to change it . It was made up and sworn in on June 14 1996

Double check the county records and make sure no changes have been made to the covenants and conditions. Not all covenants are enforceable...

You (or an attorney) would want to look at the definitions in the King County Code (21A.06.1255) and determine whether the RV would be a structure...