Future dating a Separation Agreement

The separation date is the date upon which one of the parties advises the other that the relationship is over. You are separate and a part as of that date.

What you are referring to is the fact that there is a delay in the physical separation. That is fine. People can be separate and a part and under the same roof.

You should have the Separation Agreement prepared by legal counsel in order to make sure the bank will extend you the financing you are seeking. Many banks will not accept agreements drafted by parties on their own.