Commercial Greenhouses
Building the agriculture of tomorrow
We build high tunnels & commercial greenhouse solutions, creating unique growing environments that provide professional growers with greater predictability.
Advanced Commercial Greenhouses
+60
years of experience in commercial greenhouse project design & engineering.
+10 000
commercial greenhouses installed around the world.
+20
patented technologies.
+30M
of square feet of agricultural production area.
Built for Your Operation – And Your Crops
By reimagining established concepts, we create growing systems with commercial structures and technologies that anticipate tomorrow’s needs. Our iconic innovations, such as the Gothic profile, embody this mission every day. Each of our greenhouses maximizes natural light, creating ideal conditions for growth while offering greater predictability. And with Canada’s first glass greenhouse, we combine carbon-neutral technologies with adaptability, offering more than just a structure—a sustainable vision for agriculture.
ABOUT
Commercial Greenhouses for Growers
Designed specifically for commercial growers, our professional greenhouses combine structural strength, light optimization, and disease-reducing technology to help you achieve better yield, higher quality, and greater profitability — season after season.
With over 60 years of experience and tens of thousands of installations across North America, we’ve earned the trust of professional growers in vegetables, ornamentals, berries, and nursery production. Our four proven greenhouse models offer the flexibility, performance, and longevity required to support modern horticulture — even in the harshest climates.
Commercial greenhouse builder in North America
For over 60 years, Harnois Greenhouses has been designing, manufacturing and installing structures adapted to the climatic realities and production objectives of growers. As a trusted greenhouse manufacturer, we support horticultural, market-garden and institutional growers with turnkey solutions.
Our engineering know-how, personalized approach and ability to deliver high-performance greenhouses throughout Canada and the United States make us one of the most experienced greenhouse manufacturers on the market.
Explore Recent Projects
From supporting commercial growers to celebrating agribusiness on a global scale, we’re proud to share some of our turnkey greenhouse projects with you.