contractor on title in Washington state

[Michael Paul]

As it currently stands, RCW 18.27 requires a contractor to be on title to fix and flip a property. We have a contractor that we are partnering with on a flip and I have been told that a Tenancy in Common agreement will satisfy this requirement provided it is stated on the title. My question is at what point does the contractor need to be added to the title? At closing? After closing but prior to work beginning?(Can we secure/purchase the property and then add the contractor?). Any thoughts..