Skip to main content

Heavy Civil

Our Heavy Civil Division is our core service and handles a variety of sewer, watermain and road construction projects while ensuring they are completed safely, efficiently and professionally.


General Contracting

Our General Contracting Division works with mechanical systems, process works, water and wastewater, and general infrastructure projects.



At Birnam, we work with waterway protection, erosion and vegetation control, hazardous materials, and multiple seen and unforeseen elements that can require tight constraints.


Join Our Team

Birnam is committed to building strong careers and encourage hard working, dedicated, team players to join our team. If you are interested in a career with Birnam, please apply within.


Welcome to Birnam Excavating Ltd.

A company with proven quality construction experience serving Southwestern Ontario since 1973.

Birnam Excavating Ltd. is a privately owned, family run company engaged in the sewer, watermain, roadbuilding and general contracting industry. Our work involves upgrading key infrastructure both under the ground in addition to providing quality surface works. We work to provide citizens with clean drinking water, through new watermain upgrades, proper handling of sewage systems, building pump stations, various structures and lagoons. We work to provide environmental protection and the building of better and safer roads through the completion of sidewalks, bike lanes, improved lighting and restored green spaces. With the addition of our General Contracting division, Birnam is able to offer  “full package” contracting, making great use of all of Birnam’s combined expertise and resources, allowing us to showcase our Heavy Civil, General Contracting and Environmental Divisions. Our work provides the communities of Southwestern Ontario with a better place to live.

Our mission is to exceed expectations by providing safe high quality construction products and services at competitive prices while allowing the company to grow and prosper. At Birnam we are dedicated to the growth of our employees, our company, our community and the heavy civil general contracting industry. Birnam strives to model excellence and to maintain our reputation as a company of distinction in the construction industry, as well as in the communities in which we live and work.

We are proud of the genuine care we have for our clients. As a business, we deliver quality service, experienced staff, knowledge of the industry, build strong relationships, and utilize updated equipment. To learn more about our many services, and our family oriented company, feel free to contact us today!


We are proud to offer a number of dynamic areas of expertise that are built within our company’s core structure. These include:

Crew installing sewers

Heavy Civil Projects

Our heavy civil division is our core service and manages a variety of projects while ensuring that each task is completed safely, efficiently, and professionally. From sewer, water, and roadwork to subdivision construction…

Large machine with hydraulic jack.

General Contracting

Birnam is committed to utilizing our strength in heavy civil contracting to the general contracting division. We have brought in key staff who have helped us expand and focus on the Municipal ICI Sector. Although…

Tavistock site


As the environmental sector continues to grow, Birnam has grown with it. Whether it be waterway protection, controlling vegetation against erosion, or working with hazardous materials, Birnam is confident in successfully…