Ontario-Based Modular Classroom Specialists Since 1966

Who We Are

Dedication to a Higher Standard

Our Values

Safety

Safety

From the design and manufacture of our portables to their installation on your property, safety is our number one priority.

Client-Centric

Client-Centric

Your best interest is at the forefront of all that we do. Our team is wholly committed to addressing your needs and improving your experience.

Trust

Trust

We take our role in education seriously, and value the trust you place in our team to deliver you with high-quality, secure, and reliable classroom space.

Integrity

Integrity

You can't establish trust without integrity. We don't ask you to believe us when we say we're dedicated to best in class portable quality, care, and service: we'll prove it to you.

Ontario First

Ontario First

We live where we work, and we support where we live. All of our portables are made in Ontario, for Ontario schools and businesses.

More Than a Portable: A Full-Service Classroom Solution, Ready When You Are

What We Do

The CLM Difference: One Partner, One Process
Specialized and Dedicated

Our Team

CLM's Long Standing Legacy In Ontario

Our History

Setting The Foundation

In 1946, C.L. Martin (the company's namesake) started a small, independent construction business in his hometown of Floradale, ON. 

Built on hard work, trust, and integrity, his business grew quickly throughout the 1950's. Soon, the company was incorporated.

Building Upward

In 1960, C.L., as he was known, felt that the future lay in the portable structure business and, in 1966, the first six modular buildings were constructed and leased. 

By 1975, building on their solid foundation of expertise in the construction industry, the business had fully pivoted from construction to specializing in leasing and moving modular buildings within Southern Ontario.

Rising to New Heights

Coming into the 2000's, business had expanded further into Central Ontario. With a staff made entirely of local, skilled admin and crafts workers, CLM established themselves as a fundamental, economical pillar within their local community.

Creating New Opportunities Through Partnership

With demand for portables continuing to rise and trust in CLM's classrooms only strengthening, CLM needed further support to continue their growth.

This is when Black Diamond Group, through principal brand BOXX Modular, entered the picture. Canadian-owned and operated with decades of experience in the modular industry across the country, Black Diamond saw CLM's massive potential. They officially acquired C.L. Martin in 2022, bringing their years of knowledge and experience to the table. With their support, CLM expanded their reach to all of Ontario.

A Bright Path Toward Future Success

Today, CLM is still a community-minded, small-town business at its core. Their supply of portables has reached over 1000 units, with the CLM team growing to around 30 members comprising 100% local management, admin, sales, and crafts workers, many of which were born and raised in the area.

With their unique and dedicated in-house team, CLM is looking forward to their promising future innovating classroom spaces in Ontario.

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