A seven-story affordable housing complex with mixed-use elements will rise in Sun Valley near the Metrolink station, according to an application for entitlements filed with the Los Angeles Department of City Planning.Per city records, the development will rise at 8011-8027 N. Vineland Ave., where a vacated supermarket currently stands. The edifice will include 135 one-, two- and three-bedroom units built atop a 28,290-square-foot ground-floor commercial space. On-site amenities will include a rooftop deck, community room, central courtyard and 117 parking stalls.Downtown Los Angeles-based WPH Holdings is developing the project, which is designed by Coastal Architects and sits on roughly 2 acres.WPH also has plans to transform an adjoining parking lot at 11041 Strathern St. into a 97-unit senior complex with affordable housing. If the process follows through without any complications, WPH will embark on construction for both projects by late next year.Sun Valley has become the site of several ambitious mixed-use projects of late, including the 432-unit Lankershim Crossing complex and another 110 units at 11050 Arminta St.