Evicting a hold over tenant in Washington state

[Jacob Whitbeck]

Hey everyone! 

I'm going to reach out to a real estate attorney but just hoping to get some insight on the eviction process for a hold over tenant or someone who stays outside the leas end date, back story is..

Bedroom rentals, I don't live there and haven't had this issue yet but i have a tenant whos year lease is finally up September 1st and doesn't sound like he wants to find another place to live. I gave him the notice that I will not be renewing his lease due to wanting to remodel that section of the house 4 months ago, checked up with him 45 days before lease end date and have been sending him other rentals in the area that are in the same price and size to help him find somewhere. 

I wont accept another rent payment but my question is what's the best first step for an eviction notice and can i give it the day after September 1st?

Any help is greatly appreciated!