Los Angeles-based real estate investment firm TruAmerica Multifamily announced Wednesday that it paid $28.7 million for Montclair Heights, a 174-unit apartment project in Renton. The purchase of the 16-acre property is TruAmerica's third acquisition in the Puget Sound region since December. Previously, the company paid $54 million for Arcadia Luxury Townhomes in Federal Way and $27 million for Westhaven Apartments in West Seattle.