NEW YORK CITY — Locally based landlord The Durst Organization will undertake a $150 million redevelopment of 825 Third Avenue, a 40-story office tower in Manhattan that was originally constructed in 1969. The redevelopment will include upgrades of the 544,000-square-foot building’s elevators, windows, lobby and mechanical systems, as well as the addition of new amenities. Upon completion, tenants will have access to a 3,000-square-foot ground-floor lounge with coffee, wine and arcade games. The Durst Organization will also add 15,000 square feet of health and wellness amenities on the second floor and a new terrace on the 12th floor. JP Morgan Chase and Wells Fargo have provided $100 million in financing for the project.