Four Salt Lake Valley housing complexes have agreed to pay $45,000 to settle a federal lawsuit that says they discriminated against disabled tenants or prospective tenants who wanted to keep service dogs. The Department of Housing and Urban Development said in May that owners at Pinnacle Highland Apartments, Cobble Creek Luxury Apartments, Sky Harbor Apartments and Thornhill Park Apartments had violated the Fair Housing Act by enforcing burdensome rules on pets used as service animals.