converting primary to rental and buying new primary

[Bo A Vanecko]

so I am just thinking out loud here ....

I am closing on a refi on my current primary residence... we purchased in 2016...lived in it now 3 years plus...  I am considering a custom build to move out and rent b/c we can now make about 12% c/c due to the new rate...

curious though, as a refi, is there a "seasoning" period to being able to go this route?  and also getting a new loan on the new custom build, I assume I can then turn around and get a "primary" mortgage rate on that as well?

thanks in advance

bo