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Mark S. Leen

Phone: 425-450-4219

Legal Assistant

Tawnya Sarazin

Direct: 425-450-4218


Mark's practice focuses on litigating “dirt and paper” disputes, such as contract, partnership, employment, boundary line and commercial landlord-tenant disputes, for individuals, small- and medium-size businesses, as well as municipalities. Mark also advises clients and litigates relating to trade secret and intellectual property matters and represents clients on appeal. 

Representative Matters

  • Obtained a favorable summary judgment ruling from the King County Superior Court on behalf of a landlord in a dispute between the landlord and a tenant regarding the renewal rights of the tenant under a lease.
  • Obtained partition sale of residential property on behalf of a client where the property was owned by the client and a family member as tenants-in-common and the client and family member could not come to an agreement regarding the sale of the property.
  • Obtained favorable summary judgment rulings from the Island County Superior Court on behalf of a private water association in a dispute regarding the ability of the association to assess an individual and the validity and scope of the association’s easements on the individual’s property.
  • Obtained the dismissal of a lawsuit involving the assertion of Section 1983 liability against a municipal client from the United States District Court for the Western District of Washington and successfully defended the dismissal on appeal before the United States Court of Appeals for the Ninth Circuit.

Publications & Presentations

  • Condo Utilities May Be at Mercy of Assessments, King County Bar Bulletin, July 2009
  • CR 34 and Gillett v. Conner, Washington State Bar News, October 2008

Honors, Awards & Special Recognition

  • Named Rising Star, Super Lawyers Magazine, 2013-2014 & 2017

Professional & Civic Involvement

  • Washington State Bar Association, Member
  • Presenter, Online Data Mining: Practice, Strategy, and Application, East King County Bar Association, April 2014.


Mark grew up in Bellevue, Wash.  He enjoys travel, which has allowed him to play Romeo in the balcony scene on the stage of the Globe Theater in London, stand in Tiananmen Square in Beijing, sing folk songs at Oktoberfest in Munich, view the Corn Palace in Mitchell, S.D., and attend a Wednesday audience with Pope John Paul II.  Mark also enjoys movies, Indian food and spending time with his wife and three children.