STO Building Group Named ENR New York 2026 Contractor of the Year
STO Building Group is working on SoMA at 25 Water Street, the largest office-to-residential conversion in the U.S. and a landmark adaption in New York City’s ve reuse project in New York City Lower Manhattan financial district.
As the 2026 ENR New York Contractor of the Year, STO Building Group will be recognized in the July print issue of ENR East, which will also include the regional Top Contractor rankings.
The ENR East ranking of contractors includes firms doing business in Connecticut, Delaware, Washington, D.C., Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Virginia and West Virginia. Rankings are based on total regional construction revenue of participating companies, also including breakouts by state revenue and various specialties and disciplines, as applicable.
The Contractor of the Year demonstrates success in the region in terms of growth and revenue, as well as innovation, creativity and a commitment to giving back to its community.
In New York and New Jersey, the contractor's family of companies includes Structure Tone, Pavarini McGovern, LF Driscoll and RC Andersen
In New York, Structure Tone alone generated $1.875 billion in revenue from 346 new project awards. The firm's New York City office said its largest project of 2025 was The Walt Disney Co, city-based headquarters, a 1.2-million-sq-ft interior fit-out that is a complex work environment that required the contractor to meet operational, scheduling and quality demands, it said.
STO Building Group attributes its sustained growth to disciplined execution, a diversified portfolio, workforce investment and strong client relationships. Across New York and New Jersey, it said it has benefited from a rebound in corporate interiors work and continued demand in the cultural, life sciences, facilities services, and residential conversion sectors..
Safety and workforce experience remain central to the firm's strategy, with executives noting that in 2025, it achieved its best safety performance yet despite rising construction volume.
The company is also active philanthropically. Employees volunteered more than 1,700 hours and helped raise nearly $1.2 million through company-supported initiatives, supporting causes such as Make-A-Wish, Team Foster and other local nonprofits.
Last year, STO Building Group ranked No. 5 on the ENR East Top Contractor survey with $4.7 billion in revenue. To find out where it ranks on this year’s Top Contractor list, and to learn more about the firm, check out the July issue of ENR East.
Some of STO Building Group top projects include:
- SoMA at 25 Water Street – The largest office-to-residential conversion in the U.S. and a landmark adaptive reuse project in Lower Manhattan’s Financial District. The 1.1 million sq ft redevelopment includes a full gut renovation, a new modernized façade, and the vertical expansion of the existing structure with 10 additional stories. When complete, the project will deliver 1,300 residential units—surpassing all previous U.S. conversion projects by unit count—along with approximately 100,000 sq ft of amenities and extensive outdoor spaces.
- Christie’s NY – Structure Tone is currently serving as the construction manager for Christie's NY at Rockefeller Plaza. The multi-phased 373,000 sq ft renovation for the art and auction industry leader encompasses the transformation of office spaces, front-of-house auction areas, back-of-house facilities, and critical infrastructure.
- Columbia University Vagelos Innovation Laboratories – The purpose-built biomedical research facility in New York City, the city’s first all-electric academic research lab, is an eight-story, 77,000 sq ft building at Columbia University Irving Medical Center. The project includes wet laboratories, support and administrative spaces and integrated connections to adjacent campus facilities. High-performance facade systems, collaborative interior spaces and energy-efficient building strategies are expected to reduce energy use intensity by 30% compared to ASHRAE 90.1-2010 standards.
