The greenhouse that lives up to its name
Ready to garden without limits? The Gigant is Janssens’ top-of-the-range model: a greenhouse up to 6 metres wide and 18 metres long. Functional enough for the most ambitious grower, impressive enough to host a garden party no one will soon forget.
Ready to let your garden grow into something truly grand? The Gigant is Janssens’ most ambitious model: an architectural masterpiece with space for every garden dream. Growing, lounging, entertaining or relaxing, there is room for it all.
A greenhouse for big thinking.
Every Gigant is unique, because you determine the ultimate scale. You choose the width that suits your garden, from 384 to 605 cm, and the length that matches your ambition, up to a full 18 metres. The RAL colour is entirely your choice, so the whole structure harmonises with your home and surroundings. For the configuration type, you can opt for a freestanding unit, a lean-to against the wall or a wall-mounted installation on top of a dwarf wall, optionally with a highline for extra head height. The glazing is in toughened safety glass or polycarbonate, and you decide on the position and number of sliding doors, hinged doors, side windows/top-hung windows and roof windows.
The Gigant adapts effortlessly to your scale, style and ambition.
Explore the different options below and create a greenhouse that is perfectly yours.
The Gigant range is a detached garden room that can be placed completely independently of your home. Ideal as additional living space, a studio or a relaxation area in the heart of the garden.
The Gigant range can be placed directly against your home, forming a seamless extension of your living space. Perfect for adding extra light, space and comfort to your house.
The Gigant range can be mounted on a dwarf wall of 20, 40 or 60 cm, giving the greenhouse an even more exclusive appearance, ideal when used as a garden room.
Drawing on 80 years of expertise and experience in professional greenhouse construction, Janssens has developed its own proprietary profile system, the foundation of our current range of garden greenhouses.
Five core principles guide everything we do: craftsmanship, the best price-to-quality ratio, durable and low-maintenance materials, modular construction and a product that is hassle-free for life.
Key features:
Fully adaptable to your space: choose the ideal length, width, and height yourself. With flexible glass layouts and various placement options, this greenhouse fits your home perfectly.
Dimensions
Optional
Personalize your greenhouse down to the smallest details. From frame colors to glass types and decorative finishes: configure a version that perfectly matches your style and requirements.
Frame
Glazing beads
Glass type
Decoration
Add-ons
Accessories
Janssens offers a wide range of optional accessories: from seedtrays, tablers and shelves to hanging systems.
The dimensions of the Gigant open up possibilities that simply don’t exist on a smaller scale. You can grow at production level, host events and gatherings, and transform your garden into a light-filled extension of your home. Inside, you work fully upright without restrictions, in a space that feels like a real garden hall, without ever losing its elegance.
At this scale, there is no room for compromise, and that is precisely why the Gigant is built the way it is. The self-supporting structure is engineered to carry snow loads and storm gusts across wide spans, the aluminium stays rust-free and low-maintenance, and the gutter and drainage system works just as well on the day you install it as it will thirty years from now. An investment at garden hall scale, built to last for generations.
A Janssens can be recognized by three things: the choice of materials that last for decades, a range that adapts to every garden instead of the other way around, and a level of finish that convinces even the most demanding gardener. These three pillars form the foundation of every model.
Materials and design focused on weather resistance, ease of maintenance, and timeless design. You buy a Janssens once.
From 'action models' (ready-made standard models) to fully customizable greenhouses, with a choice of dimensions, doors, windows, glazing, and finishes.
Maintenance-free aluminium, safety glass, durable rubber seals, and stainless steel fasteners. Every component is chosen for the long term.
Custom Models, the range of fully customizable greenhouses by Janssens. Each model has its own character: from the spacious Helios to the massive Gigant and the minimalist Modern.
Choose the model that suits your garden, style, and ambition.
Every greenhouse we make helps not only your garden grow, but the world too.
For every greenhouse sold, we plant a tree together with Go Forest in Peru or the Congo.
This way, we contribute to global reforestation and a better future for our planet.
Janssens sells exclusively through authorised dealers. Our international network provides personalised advice, local expertise and professional installation guidance, across Europe, Scandinavia and the United States.
