Washington Residential Lease Agreement

I am in a lease option to purchase a residential property and, unfortunately, the gentleman who entered this agreement has left us. What happens there is no will my agreement is still valid? I'm in Washington State ...

Generally, you can not have a contract with a dead person. You should consult a lawyer in your state a definitive answer. Do not delay. The conference cost low for 30 minutes with a lawyer is an added value of any loss you may suffer.