With a tower crane on site, construction is now going vertical for a new residential-retail complex in the booming South Park neighborhood of Downtown Los Angeles. The mixed-use development, dubbed the Project at Pico, will consist of a pair of seven-story structures located on namesake Pico Boulevard between Olive and Hill Streets.  The buildings, designed by Los Angeles-based architecture firm AC Martin, will offer a combined total of 360 condominiums, 6,400 square feet of ground-level retail space and 382 underground parking spaces.  Plans also call for a variety of residential amenities, including a swimming pool, a fitness center and green space. The Project at Pico is the first component of an approximately $750 million mixed-use community which is being developed by a joint venture between developer Mack Urban and engineering giant AECOM.  A second phase of the project, slated to break ground later this year, would include a 37-story condominium tower on Grand Avenue.  Tentatively scheduled for completion in 2024, a full build-out of the project could include up to 1,900 residential units. In addition to the Mack Urban and AECOM development, four similar low-rise complexes are currently under construction to the west along Pico Boulevard.