Modern Greenhouse By Janssens

Description

The Janssens Modern is a sleek, architect-designed glass structure that trades the traditional greenhouse silhouette for something altogether more contemporary. Its signature single-pitch pent roof — sloping at a clean 15-degree angle — gives the Modern a minimalist profile that reads as a natural extension of modern estate design rather than a garden accessory. Whether you envision a glass-walled outdoor office, a light-filled lounge, a year-round entertaining space, or a private sanctuary at the edge of your garden, the Modern provides 360-degree panoramic views of your grounds within a structure designed to perform in every season.

Full-length, single-pane 4mm tempered safety glass walls — without overlapping joints or dirt-trapping seams — create a seamless, high-end aesthetic inside and out. Double-hinged doors with lockable hardware open to a low-threshold entry for a seamless indoor-outdoor transition, while an integrated precision ventilation system with automatic and manual options gives you complete climate control without lifting a finger.

Available in three sizes from approximately 79 to 200 square feet, and manufactured in Belgium by Janssens to TUV and GS safety standards, the Modern is an architectural investment backed by a 15-year limited warranty.

Lead Times: 2–12 weeks depending on US inventory and any custom selections.

Payment Policy: Your card is not charged until a delivery window is confirmed, typically within 1–2 business days.

Specifications

Frame & Glazing

Frame: Heavy-duty 17-gauge tubular aluminum extrusions

Glazing: 4mm tempered safety glass — full-length single-pane vertical panels, no overlapping joints

Roof Design: Architectural pent (sloped) roof, 15-degree pitch

Foundation: Integrated 6" high foundation frame included

Ventilation & Access

Roof Vents: 2 roof vents (automatic and spindle options available)

Side Windows: Push-out side windows

Louvre Windows: Automatic louvre windows for precision airflow

Doors: Double-hinged doors with lockable hardware and low-threshold entry

M23 — Small

Footprint: 7’ 9” W × 10’ 2” L (approx. 79 sq. ft.)

M34 — Medium

Footprint: 10’ 2” W × 15’ L (approx. 150 sq. ft.)

M36 — Large

Footprint: 10’ 2” W × 19’ 11” L (approx. 200 sq. ft.)

Pricing & Warranty

Starting Price: $17,249

Warranty: 15-year limited warranty

Origin: Manufactured in Belgium

Why You’ll Love It

A Living Room Under Glass.

The Modern is purpose-built for the way people actually want to use their outdoor spaces. Host a Sunday brunch surrounded by your garden. Set up a light-filled home office. Create a private escape where the outdoors comes to you. This is a glass room designed for living, not just looking at.

No Seams. No Dirt Traps. No Compromise.

Full-length single-pane glass walls mean no overlapping panels and no horizontal ledges where grime collects. The result is a cleaner, sharper look that stays that way — and a sightline that’s as uninterrupted inside as it is from the garden.

Modern Design That Adds Real Property Value.

The sleek single-pitch roofline and clean powder-coated frame are the kind of architectural detail that elevates a whole property. The Modern doesn’t announce itself loudly — it simply makes everything around it look more considered, more intentional, more valuable.

A Year-Round Retreat, Whatever the Weather.

Heavy-duty rubber seals and superior construction mean the Modern holds interior temperature well beyond what the calendar says is possible. Comfortable on a cold morning in February, cool enough on a bright afternoon in August — it extends your outdoor lifestyle through all four seasons.

Three Sizes, One Uncompromising Standard.

The M23, M34, and M36 models span from a compact 79 square feet to a generous 200, letting you match the structure precisely to your footprint, use case, and budget without sacrificing a single detail of the design or build quality.

About the Manufacturer

Janssens of Belgium is a family-owned greenhouse company with more than 75 years of horticultural engineering expertise. Founded in 1946, Janssens has earned an international reputation for producing glass structures that set the benchmark for quality, precision, and longevity. Their structures are TUV and GS certified for safety and are engineered to perform in extreme conditions — high winds, heavy snow, and intense hail — making them a trusted architectural investment for residential and commercial properties worldwide.