Jeff Solomon, director of acquisitions for Birge & Held, (lefft), speaks with a nearby resident (right) about redevelopment plans of Centennial Apartments during an open house on Tuesday, July 13, 2021. (Kelsey Brunner/The Aspen Times) The green space between apartment buildings at Centennial Apartments would be maximized under a redevelopment proposal. Monday, July 12, 2021. (Kelsey Brunner/The Aspen Times) Redevelopment sketch plans were shown to residents of Centennial Apartments on Tuesday, July 13, 2021. (Kelsey Brunner/The Aspen Times) The green space between apartment buildings at Centennial Apartments would be maximized under a redevelopment proposal. Monday, July 12, 2021. (Kelsey Brunner/The Aspen Times) The national firm that owns Centennial Apartments in Aspen’s east end neighborhood is proposing to demolish 148 affordable housing units and replace them with rent controlled ones in perpetuity, in exchange for building up to 60 free-market condos on the roughly 10-acre parcel.