From a news article.  Decision by federal judge.

"U.S. District Judge Paul Magnuson granted the injunction on Monday, writing that it’s likely the landlords ultimately will win the case. The ordinance likely is unconstitutional in two ways, the judge wrote.

First, the landlords argued that it violates the 5th Amendment, which prohibits government from taking private property for public use without fair compensation.

“Plaintiffs claim that the ordinance operates as a per se taking because it singles out private landlords to ‘address a perceived, though vaguely identified, societal problem’ related to housing needs. The Court agrees,” Magnuson wrote.

Second, the landlords said the ordinance violates their 14th Amendment right to exclude people from their properties without due process."