Start Your Project with Harnois
Planning a new greenhouse is one of the most significant investments a grower can make. Whether you’re expanding an existing operation or building from the ground up, getting accurate numbers early is the foundation of a successful project. At Harnois Greenhouses, requesting a commercial greenhouse quote is the first step toward a structure engineered specifically for your crops, your climate, and your budget.
Why Request a Quote Before You Commit?
Every growing operation is different. A strawberry producer in Quebec faces entirely different structural requirements than a floriculture operation in North Carolina. Snow loads, wind speeds, gutter heights, covering materials, and foundation types all vary, and they all affect the final cost. That’s why a personalized quote is far more valuable than any published price list.
When you reach out to our team, you’re not just getting a number. You’re starting a conversation with engineers, agronomists, and project managers who have been building commercial greenhouses across North America since the 1960s. Our in-house experts evaluate your site conditions, your crop requirements, and your long-term goals to propose the most appropriate solution, and the most cost-effective one.
According to Agriculture and Agri-Food Canada, controlled environment agriculture is one of the fastest-growing segments of Canadian horticulture. Getting the right structure from day one is critical to long-term profitability.
What Happens After You Submit Your Request?
Our quoting process follows a clear, five-step timeline designed to move efficiently without cutting corners. Most projects go from first contact to delivery in 8 to 15 weeks, depending on complexity.
- Discovery & Evaluation (Day 1) — We discuss your objectives, crop type, available site, and budget. A remote analysis or on-site visit is arranged if needed to confirm structural compatibility.
- Engineering & Design (2–4 weeks) — Your greenhouse is designed in compliance with local building codes, snow loads, wind loads, and seismic requirements. You receive stamped engineering plans for your permit application.
- Approval & Planning (1–2 weeks) — Final design and quotation are reviewed and approved. Manufacturing and delivery are scheduled according to your timeline.
- Manufacturing (5–8 weeks) — Your structure is built in our Quebec facility using high-grade certified structural steel and the covering option best suited to your production.
- Delivery & Installation (1–2 weeks) — Shipping is coordinated and installation is prepared for efficient, on-schedule setup at your site.
Which Greenhouse Structure Is Right for You?
Your quote will reflect the specific structure that best matches your operation. Harnois offers a complete range of commercial greenhouse solutions, from entry-level high tunnels to advanced glass systems. Every structure is designed, engineered, and manufactured in Canada, built to handle North American climates and meet local building codes.
- High Tunnel Greenhouses — Ideal for extending the growing season by up to 3 months. The TunnelPro Plus starts at 31’6″ wide, requires no concrete foundation, and can handle snow loads well into Canadian winters.
- Freestanding Greenhouses (Ovaltech) — A durable, versatile structure with snow load resistance up to 80 inches and wind resistance up to 155 mph. Available in widths from 20′ to 42’+ for both heated four-season and cold-frame use.
- Gutter-Connected Greenhouses (Luminosa) — Maximizes growing space and profitability for multi-variety production, with gutter heights from 12′ to 20′ and full compatibility with advanced automation systems.
- Venlo Glass Greenhouses — Premium light transmission with up to 98% natural light. The Vermax model is designed with Near-Zero Energy Building principles, featuring a circular water system and a peak COP of up to 7.5.
Not sure which structure fits your crop and climate? Our team will guide you through the options during the discovery call, no commitment required at that stage.
A Turnkey Partner, From Design to Installation
Harnois is more than a greenhouse manufacturer. As a fully integrated, family-owned company, we manage every phase of your project in-house: engineering, permitting, manufacturing, delivery, and installation. There is no outsourcing, no coordination gaps, and no surprises on delivery day.
We also supply a complete range of greenhouse equipment and technologies, from irrigation systems and heating to LED lighting and climate control, so you can source your entire growing environment from a single supplier. As noted by the American Society for Horticultural Science, integrated infrastructure management is a key driver of efficiency gains in commercial greenhouse operations.
Many of our customers are still working with us after multiple expansion phases. Browse our completed greenhouse projects across North America to see what we’ve built for growers like you, from small single-tunnel operations to large-scale multi-range facilities.
Ready to Build? Contact Us Today
Fill out the form below to connect with one of our greenhouse specialists. Tell us about your project, your crops, and your timeline. We’ll respond within one business day with initial guidance and next steps.