Cathedral Victorian Greenhouse

Do you dream of a greenhouse that doubles as a garden centrepiece? Then the Cathedral Victorian Greenhouse is for you. It’s one of the largest and most striking glasshouses you can buy. Above all, its soaring cupola gives it real height and curb appeal. Handcrafted in Belgium by Janssens, it brings old-world English elegance to your backyard. In short, it’s a true showstopper as well as a serious glass greenhouse.

The Cathedral matches its beauty with strength. First, it uses a heavy-duty 17-gauge aluminium frame. Second, thick aluminium portal frames span its full width for extra support. Third, 4mm tempered safety glass glazes the whole structure. As a result, it stands up well to strong wind gusts and most hail. So you get a greenhouse that’s grand, durable and built to last.

Why Choose the Cathedral Victorian Greenhouse

The Cathedral stands apart for space, light and flexibility. To start, it offers around 298 sq ft of floor space — even more than the Royal Victorian line. Plus, the extended cupola section adds dramatic height and floods the interior with light. So you have ample room for plants, potting and benches. In fact, many owners also use it as a sunroom, hot tub cover or outdoor retreat.

Ventilation is excellent too. For example, four roof vents open automatically to release heat. In addition, two top-hanging side windows swing up for extra airflow, and a louvre window helps fine-tune the climate. As a result, the greenhouse stays comfortable even on hot Australian days. For access, you get a lockable double door plus a separate lockable sliding door. Better still, you can place doors and windows almost anywhere to suit your garden.

Key Features

• One of the largest, most elegant Victorian glasshouses, crowned by a grand cupola
• Handcrafted in Belgium by Janssens
• Around 298 sq ft of floor space — more than the Royal Victorian line
• Heavy-duty 17-gauge aluminium frame in bronze or black
• Reinforced aluminium portal frames spanning the full width
• 4mm tempered safety glass for strength, safety and insulation
• Four roof vents with automatic openers
• Two top-hanging side windows plus a louvre window for airflow
• Lockable double doors with closers, plus a lockable sliding door
• Flexible design — doors and windows fit nearly anywhere
• Tall 6’8″ sidewalls and a soaring 12’2″ peak

H2: Dimensions and Specifications

• Footprint: approx. 4.57m W x 6.07m L (15′ x 19’11”)
• Peak height: approx. 3.71m (12′ 2″)
• Sidewall height: approx. 2.03m (6′ 8″)
• Cupola: approx. 1.63m W x 3.1m L
• Floor space: approx. 298 sq ft (around 27.7m²)
• Frame: 17-gauge aluminium (bronze or black)
• Glazing: 4mm tempered safety glass
• Ventilation: 4 auto roof vents + 2 side windows + louvre window
• Doors: lockable double doors + lockable sliding door

So browse our full greenhouse range and greenhouse accessories. Or speak with our team for sizing, colour and configuration advice.

H2: Cathedral vs Other Victorian Greenhouses

All Janssens Victorian greenhouses share 4mm tempered glass and aluminium frames, so the difference is scale and style. The Cathedral is the grandest, with the widest footprint and a signature cupola. The Junior Victorian, by contrast, is a more compact, classic model for smaller gardens. So choose the Cathedral if you want a large, statement glasshouse. Choose the Junior Victorian if you want elegant English style in a neater footprint. For other premium options, compare our glass greenhouse range too.

H2: Foundation, Siting and Setup

A greenhouse this large needs careful planning and a solid foundation. So prepare a level, well-drained base first, such as a concrete slab. Next, choose a sunny, open spot with room for the full footprint. Then orient the longer side toward the sun for even light. Because it’s a substantial, special-order structure, check with your local council about building permits before you order. We also recommend professional assembly for the best result. For siting help, the Australian Government’s Your Home guide is excellent. The Bureau of Meteorology also helps you plan around local sun, wind and frost.

H2: What to Grow (and Do)

With nearly 28m² of bright, climate-controlled space, the Cathedral does it all. For example, you can grow vegetables, flowers, seedlings and tropical plants year-round. Plus, you can overwinter tender favourites like citrus and create a relaxing sunroom. For season-by-season advice in Australian conditions, Gardening Australia is a trusted resource.

H2: Frequently Asked Questions

What makes the Cathedral special? Its grand cupola and wide footprint set it apart. As a result, it’s one of the largest, most striking Victorian glasshouses available.

How big is it? The standard model is about 4.57m wide x 6.07m long, with a 3.71m peak — around 298 sq ft of floor space.

What’s it made from? A heavy-duty 17-gauge aluminium frame and 4mm tempered safety glass, reinforced with full-width portal frames.

How does it ventilate? Through four automatic roof vents, two hanging side windows and a louvre window. So airflow and temperature stay easy to manage.

Is it a special-order item? Yes. Because of its size, it’s made to order, so expect a lead time. We also recommend professional assembly.

H2: Conclusion

In the end, the Cathedral Victorian Greenhouse is the ultimate backyard showstopper. It combines a grand cupola, a heavy-duty aluminium frame, 4mm tempered glass and superb ventilation. Plus, with nearly 28m² of space, it’s a place to grow, pot and relax in style. So get in touch with our team for sizing, options and a quote today.