A significant shift is underway in New York City’s real estate market as a wave of office-to-apartment conversions transforms the urban landscape. This trend, driven by changing work patterns and a pressing need for housing, is leading to a substantial reduction in office space and the creation of thousands of new residential units.
According to CBRE, by the end of 2025, approximately 23.3 million square feet of office space across the 58 largest U.S. markets will be removed through conversions or demolitions, surpassing the 12.7 million square feet of new office construction anticipated for the same period . In Manhattan alone, current and proposed conversions could reduce office inventory by 16.5 million square feet, representing a 3.9% decrease .
One of the most notable projects is the transformation of 5 Times Square. Originally constructed in 2002 as the headquarters for Ernst & Young, the 38-story building has experienced a 77% vacancy rate since the firm vacated in 2022 . Now, developers RXR, Apollo Global Management, and SL Green are converting the building into 1,250 residential units, including 313 affordable apartments. The project, designed by Gensler, will repurpose approximately 917,745 square feet of office space while retaining 37,311 square feet for retail use .
Another significant conversion is the former Pfizer headquarters at 219 East 42nd Street, which is being transformed into 1,602 residential units by Metro Loft Management and David Werner Real Estate Investment . Additionally, 25 Water Street, once known as 4 New York Plaza, is undergoing redevelopment into over 1,300 apartments, marking it as the largest office-to-residential conversion in the United States .
These conversions are facilitated by recent legislative changes aimed at addressing the city’s housing shortage. The “City of Yes for Housing Opportunity” initiative, launched in 2024, expanded eligibility for office-to-residential conversions to buildings constructed before 1991, up from the previous cutoff of 1961 . Additionally, a new tax incentive, known as the 467-m tax exemption, provides substantial property tax breaks for developers undertaking such conversions .
Mayor Eric Adams and Governor Kathy Hochul have been vocal supporters of these initiatives. Mayor Adams stated, “The transformation of 5 Times Square from an underutilized office building into 1,250 new homes capitalizes on hard-fought Adams and Hochul administration victories while fulfilling my plan to build 100,000 new homes in Manhattan over the next decade” .
While these conversions offer a solution to the housing crisis and reduce office vacancies, they also present challenges. Commercial tenants may face reduced availability of office space, potentially leading to increased rents in remaining office properties. However, experts suggest that the overall impact will be positive, stabilizing the market and enhancing the value of premium office spaces .
Looking ahead, the trend of office-to-apartment conversions is expected to continue, reshaping New York City’s real estate landscape and providing much-needed housing options for its residents.