You need to get your Realtor on board and working with the Seller's Realtor to ensure your objectives are met as the tenants do have specific rights under state law. Obviously you will not close if the tenants are not out so the Realtors need to hire an interpretor, etc. to get it taken care of - no real magic here unless there is a longer term lease, which you would be bound to honor if you purchase the real estate - you need a written contract representation from the Seller there is no long term lease, etc.
Mr. Post is licensed to practice law in KS and MO. The response herein is not legal advice and does not create an attorney/ client relationship. The response is in the form of legal education and is intended to provide general information about the matter within the question. Oftentimes the question does not include significant and important facts and timelines that if known could significantly change the reply unsuitable. Mr. Post strongly advises the questioner to confer with an attorney in their state in order to ensure proper advice is received.
The lease and the mortgage are two separate estates. You are taking over the leasehold in addition to buying the property. Seattle has specific local ordinances which are going to dictate how and under what terms you can terminate this leasehold.
If the agreement is a month to month, it can be ended witha 20-day notice if you are planning to move into the property yourselves. However, it is too late in August to use the 20-day notice to end this tenancy September 1, 2009.
Unless your realtor is a licensed attorney, you would be much better served by having a consult with Evan Loeffler or Travis Scott Eller, either of whom are skilled real estate attorneys with practices in landlord tenant who can advise you properly of the special rules for ending a tenancy in the City of Seattle.
The other way would be to pay them to move. People do this all the time. Hope this helps. Elizabeth Powell