Insights

Longstanding regional focus Family-run Connecticut construction firm with deep local presence in Shelton and surrounding areas, offering potential for repeat business with public sector and municipal projects in the region.

Union backed capacity Certified union shop with LIUNA and AFL-CIO Local 478 affiliations; can leverage for projects requiring strong labor standards and skilled trades, appealing to union-friendly owners and prevailing wage contracts.

Mid-market scale Smaller-to-mid sized firm (11-50 employees) with revenue in the 10–25 million range, presenting opportunities for targeted contracted work, subcontracting roles, and long-term retainer-type engagements on local builds.

Digital footprint Utilizes modern tech stack (Store Vantage, AWS, Wix/WordPress, Google Cloud, Sentry) indicating openness to digital project management, BIM/portals, and scalable websites for marketing, lead capture, and client collaboration.

Public project exposure Recent municipal project award and investment in assets (Avery Place Utility Burial) signal active engagement with city procurement; pursue opportunities in public works, utilities, and infrastructure contracts in CT.

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John J Brennan Construction Co Tech Stack

John J Brennan Construction Co uses 8 technology products and services including Store Vantage, Amazon Web Services, Wix, and more. Explore John J Brennan Construction Co's tech stack below.

Store Vantage
Appointment Scheduling
Amazon Web Services
Cloud Hosting
Wix
Content Management System
WordPress
Content Management System
Wix eCommerce
E-commerce
Microsoft 365
Email
Google Cloud
Infrastructure As A Service
Sentry
Issue Trackers

Media & News

J. Brennan Construction Co. invests into assets: Avery Place Utility Burial project.
To take such action as the meeting may determine, to award a contract to John J. Brennan Construction Company, in the amount of $493,810, for the Avery Place Utility Burial project, Bid #22-042T, subject to Town Attorney Review.
Jun 21, 2022 | www.westportct.gov

John J Brennan Construction Co's Email Address Formats

John J Brennan Construction Co uses at least 4 email formats:

John J Brennan Construction Co Email Formats	Example	Percentage
FirstL@jjbrennan.com	JohnD@jjbrennan.com	59%
FLast@jjbrennan.com	JDoe@jjbrennan.com	23%
FirstLast@jjbrennan.com	JohnDoe@jjbrennan.com	9%
LastF@jjbrennan.com	DoeJ@jjbrennan.com	9%

Frequently Asked Questions

What is John J Brennan Construction Co's phone number?

You can contact John J Brennan Construction Co's main corporate office by phone at

+1-203-929-****

. For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is John J Brennan Construction Co's official website and social media links?

John J Brennan Construction Co's official website is jjbrennan.com and has social profiles on LinkedIn.

How much revenue does John J Brennan Construction Co generate?

As of September 2026, John J Brennan Construction Co's annual revenue is estimated to be $10M - $25M.

What is John J Brennan Construction Co's NAICS code?

John J Brennan Construction Co's NAICS code is 23 - Construction.

How many employees does John J Brennan Construction Co have currently?

As of September 2026, John J Brennan Construction Co has approximately 25 employees across 2 continents, including North America and Europe. Key team members include President: L. D., President: E. C. and President: J. M. Explore John J Brennan Construction Co's employee directory with LeadIQ.

What industry does John J Brennan Construction Co belong to?

John J Brennan Construction Co operates in the Construction industry.

What technology does John J Brennan Construction Co use?

John J Brennan Construction Co's tech stack includes Store Vantage, Amazon Web Services, Wix, WordPress, Wix eCommerce, Microsoft 365, Google Cloud and Sentry.

What is John J Brennan Construction Co's email format?

John J Brennan Construction Co's email format typically follows the pattern of FirstL@jjbrennan.com. Find more John J Brennan Construction Co email formats with LeadIQ.

When was John J Brennan Construction Co founded?

John J Brennan Construction Co was founded in 1897.

John J Brennan Construction Co

Q: What technology does John J Brennan Construction Co use?

John J Brennan Construction Co's tech stack includes Amazon Route 53, Sitelinks Search Box, jQuery, Priority Hints, Nginx.

Q: What is John J Brennan Construction Co's NAICS code?

John J Brennan Construction Co's NAICS code is 23 (Construction).

ConstructionConnecticut, United States11-50 Employees

John J Brennan Construction Co is a construction company based in Shelton, Connecticut, with a mailing address at 70 Platt Road, Po Box 788 in Shelton 06484, United States, and maintains a website at https://jjbrennan.com. It is a family-run business that has operated in Shelton since 1897. The company employs 11 to 50 people and relies on skilled craftsmen to undertake a wide range of construction projects. John J Brennan Construction Co functions as a union shop, collaborating with the Laborer’s International Union of North America and the AFL-CIO International Union of Operating Engineers Local 478. In 2022, the town of Westport awarded a contract to the company for the Avery Place Utility Burial project (Bid #22-042T).