This high quality classic Janssens 5ft 3.9in x 7ft 8.9in x 7ft 1in Helios Urban Victorian Glass Greenhouse Kit with 4mm Tempered Glass Glazing provides the optimum environment for gardening year round while adding a delightful presence to any backyard setting.
The compact Janssens Helios Urban Victorian is a traditionally styled design with a modern twist, the sliding door is unusually placed on the length of the greenhouse making it an excellent choice when this orientation is required.
Made in Belgium to perform in any environment, it is made from ultra strong box section aluminum and is supplied with 4mm Toughened Safety Glass, Fir Green or Jet Black powder coating, and comes with roof crests and finials as standard.
Although we do not stock this model in the warehouse, the Helios Urban Victorian is a pre-packaged Janssens "Action Model" which can be supplied with an expedited lead time compared with custom-configured models. It can be ordered at any time, please see the estimated arrival time below. And of course like all the Janssens greenhouses this model can also be heavily customized - give us a call at 888-648-5333 to discuss customization and costs.
This Helios Urban Victorian Glass Greenhouse Kit comes with:
- A sliding door
- A louvered window
- Large gutters with downspouts
- Large bottom frame/base
- Roof Crests and Finials
FEATURES
- Compact Hobby greenhouse: 41.3 sq ft
- Strong heavy duty "square" hollow tube framing with thick gauge
- 4mm tempered glass glazing for safety and good insulation value. Glass is secured in place with heavy rubber sealing
- 5ft 11in full height side walls provide excellent headroom along the interior sides, with an 7ft 1in overall height at peak
- Decorative roof ridge adds a touch of English sophistication and to deter birds perching on the roof
- 1 sliding door, can be installed on long side only. Slides on the outside of the greenhouse. Can be installed to slide in either direction.
- Optional low threshold kit can be ordered for the sliding door.
- Large gutters with downspouts
- 4 inch high foundation base can anchor to bare level ground, a wood platform, or a concrete slab
- Made in Belgium
- 15 Year Limited Warranty
- Financing Available
SPECIFICATIONS
- Assembled Size: 5ft 3.9in x 7ft 8.9in x 7ft 1in
- Peak Height: 7ft 1in
- Side Wall Height: 5ft 11in
- Footage: 41.3 sq ft
- Frame: Aluminum
- Color: Jet Black or Fir Green
- Glazing: 4mm Tempered (Toughened) Safety Glass
INSTALLATION MANUAL

About Janssens Greenhouses
Janssens Greenhouse Assembly Overview
What Makes Janssens a Quality Greenhouse Brand
Janssens greenhouses are renowned for their European craftsmanship, superior materials, and long-lasting design. Every detail is built to exceed the standards of most competitors in the same price range, ensuring exceptional performance and visual appeal.
Premium Construction and Materials
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Heavy-duty aluminum frame: Janssens uses thicker, stronger aluminum profiles than most greenhouse brands, giving each structure superior rigidity and weather resistance.
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Corrosion-proof hardware: All fittings are made from stainless steel, preventing rust or deterioration in humid or outdoor environments.
High-Performance Glazing
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4 mm tempered safety glass: While many greenhouses use 3 mm glass, Janssens provides thicker, TÜV and GS-certified tempered glass for better insulation and durability against wind, hail, and impact.
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Full-length glass panels: Each glazing sheet is a single, unbroken panel that creates a sleek, modern appearance—unlike the overlapping or segmented panels found on many other brands.
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Weather-tight sealing system: Heavy-duty rubber gaskets hold the glass securely in place, improving insulation and reducing heat loss during colder months.
Smart Design Advantages
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Integrated foundation frame (4” high): Included with every Janssens greenhouse, providing a stable, level base that other brands often charge extra for.
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European engineering standards: Janssens greenhouses are precision-built and independently tested for strength, safety, and long-term reliability.
Optional Accessories
Doors
- Additional Sliding Doors
- Additional Hinged Doors
- Lowered Threshholds for Doors
- Drop Kits for Doors (to place on a knee wall)
Windows
- Additional Roof Vents
- 'Push-Open' Side Windows
- Additional Louvre Windows
- Fly Screens for Roof vents
- Fly Screens for Push Open Side Windows
- Fly Screens for Louvre Windows
- Manual Openers for Roof or Side Windows
- Automatic Openers for Roof or Side Windows
- Automatic Openers for Louvre Windows
- Covers for Louvre Windows
- Restraint Cable System for Roof Vents
Shelving
- Top Shelf
- Bottom Shelf (Seed Tray)
- Slatted Shelving
Climate Moderation
- Wooden Roof Shades
- Shade Curtain
- Roll-Up Shades
- Exhaust Fan
- Solar Powered Exhaust Fan
- Intake Vent
- Palma Heater
- Big Red heater
- Digital Thermostat
Miscellaneous
- Wheelbarrow Ramp
- Metal Plant Hooks
- Solar Powered Light
- Grow Light
- Scroll Supports
- T Bolts

PRODUCT DESCRIPTION
