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Exaco Janssens Cathedral Victorian Greenhouse with Large Cupola 15 x 20 Ft

by Exaco
SKU Cathedral-Br
Sale Sale
Original price $42,999.00
Original price $42,999.00 - Original price $42,999.00
Original price $42,999.00
Current price $35,999.00
$35,999.00 - $35,999.00
Current price $35,999.00
Color: Bronze
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The Janssens Cathedral Victorian Greenhouse is a versatile, spacious, feature-packed addition to any large garden or backyard. The 20 by 15-foot floor size, tall sides, and extended roof cupola section allow space for all your plant growing needs, or use it as a hot tub cover or outdoor sunroom.

The attractive looks of the Cathedral Greenhouse are matched by the superior strength of pre-welded aluminum framing and 4mm tempered glass construction. This choice of glass provides a high degree of safety and exceptional insulative value.

The Cathedral Greenhouse includes four roof vents with automatic openers and a louver window to help keep the interior at a comfortable temperature. Two hanging windows on the sides can also swing up for added ventilation. A set of lockable swinging doors and a single lockable sliding door make entry simple.

Additional features include four roof vents with automatic openers and a louver window which can be used together for enhanced temperature control. For added ventilation, two large hanging side windows open by swinging upward. Access is easy through a wide set of lockable swinging doors and a single lockable sliding door.

This is a premium, large-size structure that can be used for multiple purposes and will add value to your home. In addition, the perfect aesthetic of this structure is sure to capture the attention of anyone who has the pleasure of viewing it.

Cathedral Victorian Greenhouse with Large Cupola includes one double set of hinged doors with closers, 1 sliding door, 2 top hanging side windows, 1 louver window, and 4 roof windows with spindle openers and 4mm tempered glass. 

How many slats does the cathedral normally hold?

Without special custom work, the Cathedral really only allows shelving on the shorter sides due to the heavy duty portal framing.  Three slatted shelves may be run end to end along the shorter sides (of either or both widths).  One slatted shelf would fit between the heavy duty portal framing on the long sides.

Special feature:

  • 2 heavy-duty aluminum reinforcement supports (from front to back) - 2.3" W x 5.2" D.
  • Also includes 10'2" L x 5'4" W cupola with pre-welded frame (horizontal part).
  • Greenhouse is 15' W x 19'11" L x 12'2" H, side walls are 6'8" H

Benefits of a Cathedral Victorian Greenhouse

  • Versatile & Spacious
  • Sustainable Harvests
  • Adds Value to Your Home
  • Beautifully Engineered
  • Aesthetic Perfection
  • Eco Friendly
  • Superior Durability
  • Humidity & Temperature Control
  • Works Great as Hot Tub or Sunroom
  • Organic Food 
  • Customizable Dimensions, Colors & Accessories
  • Whether Protection
  • Pest Prevention
  • The Whole Family Loves Them


  • 298 Square Feet Floor Space - Spacious Size
  • 1 Double set of hinged doors with closers
  • 1 Sliding Door
  • 2 Top Hanging Side Windows
  • 1 Louvre Window
  • 4 Roof Windows with Spindle Openers
  • 4mm Tempered Glass
  • 2 Heavy Duty Aluminum Reinforcement Supports - Front to Back
  • Extended Roof Cupola
  • Pre-Welded Horizontal Frame Sections
  • Made in Belgium


  • Main Dimensions: 19' 10" w x 15' l x 12' 2" h
  • Second level roof nook dimensions: 5' 4" w x 10' 2" l
  • Floor space: 298 sq. ft.
  • First gutter height: 6' 8"
  • First ridge height: 9' 1"
  • Second gutter height: 10' 9"
  • Second ridge height: 12' 2"



This item ships to all States of the contiguous U.S.A (lower 48).

Please note that most of our shipments go by LTL freight. For more information check out our Shipping Policy.

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Returns are easy, simply look at the return policy underneath the add to cart button or contact us for an RMA form to submit. Some brands do not allow returns, please check!

For more information, please see our official policy here: Return Policy!

Customer Reviews

Based on 1 review
How Would You Rate Our Customer Service?: You Guys Are Doing Great!
Decided to purchase because: Customer Service
Perfect Blend of Elegance and Functionality For Our Big Backyard!

We bought this specific design instead of the royal victorian's because of the amount of space it provides. The design has so much space for all of my gardening needs and we setup a small workspot for the husband! We chose the dark green option to better match the nature in our backyard - it almost blends into the line of trees we have towards the end of our backyard.

Only reason we bought is because Andy from the customer service team answered all of the different questions we had. When we had some technical questions he brought in the manufacturer to ensure everything fit and we were able to install the shelves on the side closer to the house (more sunlight there).

Delivery was a bit tough even though Andy warned us about how heavy the package was and the fact that we needed two people there to help move different pieces at a time to our backyard. Overall it took about 3 days for our contractors to put everything together and it had very clear instructions. Were super happy with the purchase and excited to the item for years to come.

We appreciate the time you took to write this lovely review! We're delighted you're enjoying your purchase and liked the color selection that comes with it. It's also great to hear that Andy was instrumental in answering your questions while involving the manufacturer for a perfect fit. We're here to help if you ever need any post sale support in the future.

We value your satisfaction and hope you enjoy your purchase for years to come!

Have questions? Call us at (725)239-9966 immediately to reach one of our experts!

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