Muss Development LLC has leased an additional 7,852 s/f to Document Technologies, LLC at 64 West 48th St., the developer's 17-story, 130,000 s/f office building near Rockefeller Center. Document Technologies (DTI) — one of the largest independent providers of on-site facilities management services and electronic data discovery solutions servicing top law firms and corporations nationwide — already occupies the entire sixth floor, and has now also leased the entire ninth floor, bringing its total footprint into the building to approximately 17,000 s/f. DTI will occupy the new space in the third quarter. The Colliers International team of Brian Given, Lou Prisco, and Eric Lasoff represented Muss Development in the DTI transaction. Additional tenants in the building include Xerox, On Press Graphics, Carrera, Shrenuj USA, World of Travel, and sporting goods retailer City Sports, among others. "The Rockefeller Center area is always in demand among healthy office tenants, particularly to buildings that provide quality office space," said Muss Development Principal Jason Muss. "With DTI's expansion onto a second full floor we are close to being fully leased, and are actively showing the remaining space." The property has undergone significant upgrades recently and is ideal for well-located headquarters offices. A building-wide multimillion dollar capital improvement program is underway at 64 West 48th Street, and includes a beautifully restored lobby, new elevator cabs and common areas, new windows, upgraded facade and roof, new HVAC systems, electrical system upgrades, new bathrooms, upgraded security systems and keycard access. Only 4,000 s/f remain of rentable space. With an unrivaled location, 64 West 48th Street is situated between Grand Central Station, Rockefeller Center, Penn Station and Bryant Park and just 50 steps from the entrance to the B, D, F and M lines and Sixth Avenue, and one block from the N, R and W lines. The area offers an unparalleled shopping experience with exclusive shops and department stores nearby and the indoor mall beneath Rockefeller Center. A nearly endless array of dining offering all types of cuisine makes the building an ideal location for corporate tenants who entertain clients.