From Inception to Completion

Built Right.
Built Safely.

S.E.M. Construction is a trusted general contractor serving Southwestern Ontario, with specialized expertise in institutional, commercial, industrial, and multi-family residential projects. From initial planning and permitting to final completion, we’re your dedicated partner every step of the way.

With decades of combined experience, a forward-thinking approach, and an uncompromising eye for detail, we ensure your project is delivered on time, on budget, and with craftsmanship that consistently exceeds expectations.

We Do It Right Every Time

Throughout our 17 year history, we have built a strong reputation of integrity, professionalism and value.

Years of service

140

Completed Projects

Team Members

A Proven Leader in the Construction Industry

Choose S.E.M. Construction for a partner who brings excellence, innovation, and reliability to your next construction project.

Proven Expertise

With hundreds of successful projects across diverse sectors, our decades of experience translate into confident execution and consistent superior results.

Client-Centered Approach

Founded on exceptional customer service principles, we prioritize your needs at every project stage—from initial planning, approvals, tendering, and construction to final delivery.

Innovative Leaders

We continuously invest in our team’s development, keeping us at the cutting edge of construction building information modelling (BIM) and project management technologies, materials and methodologies.

Complex Project Specialists

From challenging site conditions to sensitive operational environments, we excel in situations where precision, adaptability, and specialized knowledge make all the difference.

Relationship Builders

We measure success not just in completed construction projects but in lasting partnerships built on trust, transparency, and consistent delivery on our promises and commitments.

Project Planning Experts

We don’t just build—we empower.

With deep-rooted expertise in project financing, we guide our clients through every financial phase with precision and confidence. Whether you’re launching a new development or expanding existing infrastructure, our team ensures your project is backed by smart, strategic funding solutions tailored to your goals. Trust us to turn complex financing into a clear path forward.

"S.E.M. Construction's expertise in affordable housing has been invaluable in bringing our 82-unit project from vision to reality. Their understanding of construction methodology, financial viability, and attention to detail throughout the pre-construction phase gives us complete confidence they will execute this important community development with the highest level of knowledge, care and professionalism."