Modern

Happy Earth Day! April 22, 2026. Help Save Our Planet and Start Composting! See Our Composter Collection

Modern Greenhouse

Crafted in Belgium by Janssens, the Modern Greenhouse is a timeless expression of English garden tradition. The distinctive design of the Modern combines elegant proportions with enduring strength to create a true focal point in the garden.

Jump to:

Features Specifications Accessories Gallery FAQs

Overview

This shed-roof model replaces traditional ornamentation with a single-directional glass wall that maximizes light and open views.

Built with sturdy tubular portal frames, extra-strength tubular gutters on all four sides, and 4 mm tempered glass, it offers dependable strength through changing seasons. The flexible layout lets you place doors and windows where they work best in your space.

Designed for hobby and serious gardeners who want more than basic functionality, the Modern greenhouse offers an inviting, light-filled sanctuary where plants thrive and time spent outside becomes enjoyable and purposeful. Crafted in Belgium by Janssens, a family company with over 75 years of greenhouse expertise, it combines European design heritage with modern engineering for lasting beauty and performance.

View All Gallery Images

Key Features

Belgium Engineering

Designed and manufactured in Belgium

4 mm Tempered Glass Panels

28” wide clear tempered glass glazing

17-Gauge Aluminum Frame

Provides sturdy structural support

Sloped Shed Roof

Single-slope roof design

Flexible Door Placement

Door location chosen during assembly

Roof Vents

Support natural ventilation

Push-Out Side Windows

Open outward for airflow

Louvre Window

Provides additional ventilation

Automatic Vent Openers

Open and close based on temperature

Find a Retailer ￫

Specifications

Glazing: 4mm tempered glass panes
Frame: 17 gauge tubular aluminum extrusions
heavy duty roof extrusions
Colors: Black (RAL9005)

M23 - (Special Order Only)

Suggested Retail: $17,249
Length: 10'2" (4 panels)
Width:7'9" (3 panels)
Peak Height: 8'10"
Sidewall Height: 6'7"
Area: 79 sq. ft.
Roof Pitch: 15 degrees
Doors: 1 Set of Double Hinged Doors
Windows: 2 Roof Vents, 2 Push Out Side Windows, 1 Louvre Window
Window Openers: 1 Automatic + 1 Spindle (Roof), 1 Automatic (Louvre)

M34

Suggested Retail: $21,999
Length: 15' (6 panels)
Width:10'2" (4 panels)
Peak Height: 9'7"
Sidewall Height: 6'7"
Area: 150 sq. ft.
Roof Pitch: 15 degrees
Doors: 1 Set of Double Hinged Doors
Windows: 2 Roof Vents, 2 Push Out Side Windows, 2 Louvre Windows
Window Openers: 1 Automatic + 1 Spindle (Roof), 2 Automatic (Louvre)

M36

Suggested Retail: $25,999
Length: 19'11" (8 panels)
Width:10'2" (4 panels)
Peak Height: 9'7"
Sidewall Height: 6'7"
Area: 200 sq. ft.
Roof Pitch: 15 degrees
Doors: 1 Set of Double Hinged Doors
Windows: 2 Roof Vents, 2 Push Out Side Windows, 2 Louvre Windows
Window Openers: 1 Automatic + 1 Spindle (Roof), 2 Automatic (Louvre)

Accessories

Comes Standard With

Can Also Add

Gallery

Click to zoom

Frequently Asked Questions

Do I need a professional assembler for my Janssens’ glass greenhouse? If so, how do I find one?

Many of the Janssens’ greenhouses are designed to be a DIY assembly by handy homeowners, however, this model may have some challenging sections that it may be better to have a professional assembler do. Hinged doors, knee walls, cupolas, heavy framing, T-shaped models and larger sizes are all things that can add to to level of assembly – depending on the model and options you choose. We do maintain a referral list of independent assemblers, please give us a call or email us and let us know where you are located and your greenhouse and we put you in touch with a couple assemblers in your area. If you prefer to work with someone local -handyman businesses and landscapers are great assemblers too! Exaco does provide all US customer support and we are here to help with any assembly questions that you or your assembler may have. Just give us a call!

What if I need assembly help?

Exaco is here to help! Our friendly customer support staff is REAL PEOPLE who have assembled these greenhouses and are very familiar with the parts and pieces. Please give us a call or email us. We are also able to video calls via Facetime or Google Meet as needed. We want to help you to get through any assembly questions so you can get to the fun part – enjoying your new greenhouse!

Where are Janssens’ greenhouse made?

Janssens has been manufacturing quality greenhouses for over 75 years in Lier, Belgium.

Can someone help me decide which greenhouse is best for me?

Our retailers are great resources to reach out to discuss greenhouses – and our Exaco customer service team is always ready to help your dream greenhouse come to life – we are just a call away. Over the years we have personally supported many customers choose their greenhouse and options – and that expericence goes a long way. You can also find additional resources and inspiration on our blog too.

Do I need a permit?

You might need a permit. Not everyone does and even sometimes those who do need a permit do not apply for one. Each municipality sets their guidelines for what types/size of buildings need a permit in their area – sometimes this is based on square footage or whether they consider it a “permanant structure” – but this is all decided by your local permit office. If you are applying for a permit, you should always go through this process BEFORE you order your greenhouse – depending on local wind/snow load requirements you may need additional reinforcements or supports to reach your local requirements. You may also find other restrictions for placement that may mean you have to limit the size or location. If you are going to get a permit, it is always best to know the restrictions ahead of time.

Resources & Documentation

Find Your

Retailer

Interested in finding this and more exclusive Exaco products and accessories? Find an authorized retailer near you!