P.S. 129 addition is a four-story, fully air-conditioned, accessible facility for students in pre-kindergarten through fifth grades. The addition includes four pre-kindergarten classrooms, three kindergarten classrooms, eleven standard classrooms, as well as five district special education classrooms. There will also be two art rooms, music room, and a dance room. The facility will also include a library, medical suite, cafeteria and kitchen complex, parent room, and a supervisory office. Improvements to the main building include one kindergarten classroom, three standard classrooms, one district special education classroom, and two reading/speech resource rooms. Outdoor improvements include an early childhood playground.