A massive, mixed-use development that will bring retail and office space as well as condominium units and open public areas to downtown Flushing broke ground today. Elected officials and community leaders joined project managers and business leaders to celebrate the first construction phase of Flushing Commons, a sprawling development on a five-acre site located near 39th Avenue, Union Street and 138th Street. The proposed $850 million project includes a 1.5-acre town square consisting of an open space with a fountain and plaza that will be large enough to support community-sponsored cultural events and performances; 1,600 parking spaces with short-term parking at below-market rates; a 62,000-square-foot state-of-the-art YMCA featuring a swimming pool, basketball courts, a running track, an exercise room and daycare; 36,000 square feet of community space; 235,000 square feet of retail space; 185,000 square feet of office space; and roughly 600 residential condominium units. Sounds like there is something here for everyone. The project is expected to be completed by 2020. More images and a rendering of the final project after the jump.