How to get a lease signed before closing on a new rental?

[Grayson Graham]

Hello BP and thank you for taking the time to help me navigate this situation!

Im buying a new construction single family rental and there is some uncertainty about the exact closing date. The builder is bogged down by busy subs and its starting to look like we could miss closing on 1/31 if the home isn't done in time, might take up to two weeks longer than planned. I have a renter ready to sign a lease and move in on Feb 1st, luckily she is flexible on her move in date. The renter has agreed to sign a lease with an addendum stating that the exact move in date is dependent on the completion of the home and the first month rent will be prorated based on when she is able to move it. Is this a viable solution?

Im using the Oregon Rental Housing Association fixed term rental agreement as a lease template but ORHA doesn't provide an addendum template for my situation. Any advice on how to make this addendum legitimate would be appreciated, thank you!