Skip to main content



Allied Builders, Inc. is a privately held, open shop, public and private commercial general contractor and construction manager. Centrally located in Brockport, New York, the majority of Allied Builders’ projects are concentrated around Buffalo, Rochester, and the Finger Lakes. As Allied Builders gains new national clients and supplier networks, it is actively working to broaden its geographical base.

Allied Builders maintains engineering and design departments on staff along with the latest information management systems for estimating, project management, and accounting. Most employees have over ten years of service and staff turnover is very low.

Allied Builders maintains a national presence in the temperature controlled storage market and will consult, manage, and build these facilities anywhere in the world.

Hartford Insurance recently recognized Allied Builders for maintaining a fifty-year record of superior safety and fiscal responsibility.

Brockport Offices

Brockport Office


Allied Builders provides a full range of construction services. With its established relationships with leading banks, developers, and suppliers, Allied Builders can:

  • Bond your aggregate projects up to $40,000,000 in size
  • Pre-Construction Services/Conceptual Budget Cost Analysis
  • Design/Build
  • Construction Management
  • Scheduling and Planning
  • Process equipment installation and mill wrighting work
  • Self Performed Concrete, Carpentry, Masonry, and Site Work, plus Equipment Installation and Miscellaneous Specialties


The predecessor of Allied Builders was the Carl Petronio Construction Company, started by Carl Petronio, Sr. and his son, Carl Petronio, Jr., in 1955. John Petronio (son and brother), and the brothers Charles and Matt Pecorella joined in the 1960s. During the 1980s Allied Builders moved from Albion, New York to its current headquarters and yard in Brockport. Soon thereafter, Gary Nanni joined the firm and rose to a leadership position. Not only have Allied’s principals been involved in the construction industry for their entire careers, but they come from second- and third-generation “construction families” who taught them to value craftsmanship and integrity first and foremost.

Working on water treatment plants during the 1960s helped to establish the Carl Petronio Construction Company as a leading commercial builder. In the 1970s its focus was on renovating and building industrial and storage facilities. By the 1980s Allied Builders had evolved and grown to become a versatile and full service general contractor and construction manager, working on a wide variety of commercial, industrial, educational, healthcare, and municipal projects. In 2004, Allied Builders was ranked Number 2 on the Rochester Top 100 List of the Rochester Democrat & Chronicle’s Leading Private Companies. Allied Builders is now operated by Gary Nanni while the original founders continue in an advisory role. Allied Builders also maintains ties with its former parent company, The Allied Group. Working with the Allied Group’s resources and network, Allied Builders can provide additional logistic, financial, and development services to its clients.


Gary Nanni

Gary L. Nanni

Gary L. Nanni
Vice-President of Allied Builders
BS Civil Engineering, Syracuse University, 1977
Registered Professional Engineer in New York State since 1984
Member, American Society of Civil Engineers
Member, Associated General Contractors of America

Gary began his professional career with Carl Petronio Construction Company in 1977, transitioning to Allied Builders in 1984.

Founding Partners

Founding Partners

Founding Partners
John J. Petronio
Carl V. Petronio
Charles W. Pecorella
Matteo Pecorella, Jr.