Gigant Greenhouse

The Janssens Gigant greenhouse represents the pinnacle of grand-scale estate engineering and elite horticultural performance. True to its name, this monumental structure features a soaring roofline and a vast, sweeping interior volume designed specifically to accommodate tall tropical canopies, large-scale cultivation projects, and expansive botanical collections that standard greenhouses simply cannot house.

Crafted in Belgium by Janssens—a premier family company with over 75 years of master greenhouse craftsmanship—the Gigant merges historic European design heritage with heavy-duty, commercial-grade engineering. With a highly versatile blueprint that allows for completely custom, flexible door and window configurations, this structural marvel can be tailored precisely to match your landscape's architectural layout and your personal growing workflow.

Please Note: Because the Gigant is a specialized architectural structure built exclusively to custom specifications, each unit is individually manufactured to order at the Janssens factory in Belgium. Lead times are longer than standard models—a direct reflection of the bespoke craftsmanship required to build a sanctuary of this magnitude.

Signature Engineering & Monumental Scale:

• Grand Volumetric Design: Engineered with an extra-tall roofline and immense square footage, providing superior vertical clearance for mature trees, hanging installations, and multi-tier staging.

• Heavy-Duty Portal Framing: Built with an ultra-robust, thick-gauge tubular aluminum framework and industrial stainless steel hardware to ensure maximum stability across a massive footprint.

• Premium Glazing: Wrapped entirely in premium, full-size 4mm tempered safety glass panes for flawless clarity, high wind resistance, and optimal ambient light distribution.

• Bespoke Ventilation Paths: Features a fully adjustable layout for smooth-gliding access doors and roof windows, enabling you to design the perfect microclimate and traffic flow for your collection.

• Uncompromising Structural Longevity: A masterful fusion of monumental European aesthetics and low-maintenance, industrial-strength materials built to withstand intense weather and inspire generations.

When you invest in a Janssens structure, you are not just purchasing a greenhouse—you are adding a permanent architectural asset to your estate. For over 75 years, Janssens has been Europe’s premier manufacturer of luxury glass greenhouses, engineered in Belgium to meet the highest standards of beauty and durability.

• Architectural Glass: Unlike flimsy polycarbonate panels that discolor, scratch, and cloud over time, Janssens uses 4mm tempered safety glass. It provides crystalline clarity, superior insulation, and is rubber-sealed to be completely wind and watertight.
• Industrial-Grade Framework: Built with heavy-duty, thick-gauge aluminum profiles, these structures are engineered to withstand extreme weather. They handle heavy winter snow loads and high wind gusts that would compromise standard hobby greenhouses.
• Superior Ventilation & Design: The steep 38-degree roof pitch isn't just a classic English look—it maximizes interior headspace, allows optimal light penetration, and works alongside the integrated roof vents to handle heat distribution perfectly.
• Built for Generations: Every joint, gutter, and condensation channel is seamlessly engineered into the frame. Low-maintenance and rust-proof, a Janssens greenhouse is designed to look as striking in thirty years as it does the day it is assembled.