The John J. Brennan
Company History
128 Years of Excellence ~ 1897-2025
A family business from day one
In 1897, John J. Brennan, a 38-year old mason and son of Thomas Brennan of Shelton, decided to start a masonry and concrete placement business. The new firm, a family business, was named John J. Brennan & Sons and was located in a barn on Cliff Street, behind the yet-to-be completed St. Joseph's Church. As Mr. Brennan's five sons grew older and started their families, they built their houses along Cliff Street as well.
An integral part of a growing community
The new business flourished throughout the early 20th century. Many of the brick factory buildings in Shelton, Derby and Ansonia were built by John J. Brennan & Sons. One of the earliest contracts included masonry work in the beautiful Church of the Good Shepherd on Coram Avenue and Kneen Street in 1905. The Depression years saw a change in the business, directing the firm's diversification into general contracting.
The influence of war
World War II signaled a significant upturn in business as the company responded to the need for factories to retool and expand – in order to handle defense-related orders.
The John J. Brennan Construction Company (renamed in 1955) remained on Cliff Street until 1967. Later that year, it relocated to White Street and then to its present location on Platt Road.
From this period to the present, the company has continued to expand its capabilities and services to meet the growing needs of the greater valley area, and beyond.
Five Generations of Brennans continue the legacy
Today, Brennan is managed by Eric and Matthew Brennan – the fourth generation after John J. Brennan started his masonry business over 100 years ago. Project manager, Ryan Brennan, is the first to represent our fifth generation legacy. Together they continue to work the business with the same dedication to quality and service that built the company into the business it is today.
Five generations of Brennans continue a tradition of excellence and a respectful approach to construction that’s free of hassles, free of agendas, free of surprises. Customers expect an outstanding job at a fair price – Brennan people break their backs making that happen.
Our Heritage of Quality Since 1897
For more than 125 years, John J. Brennan Construction has proudly remained a family-owned and operated business, with five generations of Brennans carrying forward our legacy of excellence since our founding in 1897.
On our 125th anniversary, Governor Ned Lamont recognized our company with an Official Statement honoring our contribution to Connecticut as a trusted provider of high-quality General Contracting services. From public to private clients, our strong management team and dedicated employees have helped shape the state’s infrastructure, reflecting our deep commitment to building a stronger, more vibrant Connecticut for generations to come.
As we look toward the future, we remain guided by the values that have defined us for over a century: Integrity. Pride. Versatility.
