Expert Support

Call (725)-239-9966 for special pricing.

2,000+ Happy Customers & Jealous Neighbors

500+ 5 Star Reviews

Free Shipping

On Orders Over $200!

Modern M23 greenhouse with sloping roof and black frame, set in a lush garden with a person enjoying a quiet read inside.

Exaco Janssens Modern M23 Sloping Roof Greenhouse 8x10x9 ft

by Exaco

SKU M23-Modern

Sale

$18,000.00

$18,000.00 - $18,000.00

$18,000.00

$12,999.00

$12,999.00 - $12,999.00

$12,999.00

Benefits

Best For

Bonuses

Elevate Your Backyard with top of the line premium glass greenhouse that prevents replacing cheap polycarbonate greenhouses every year.
Massive Accessory Customizations allow you to design the greenhouse to fit the style of your backyard.
Indulge In All That Extra Space with your family, neighbors, children, and most importantly your plants.
Make Your Neighbors Jealous with a finely designed outdoor shade solution.

Serious Plant Parents: Ideal for those who love growing plants all year round or need a separate space for other activities.
All-Season Growing: Perfect for individuals who want to enjoy an enclosed space year-round, regardless of the weather.
Design Enthusiasts: Tailored for homeowners who appreciate the beauty of natural of a premium glass greenhouse in their backyard.

Risk-Free Purchase: We provide replacement parts free of cost.
Premium European Quality: Proudly designed and assembled in Belgium. 15 Year Standard Warranty.
Exaco Preferred Dealer And No Sales Tax (ex NV)
Lowest Prices Or We Price Match (Rules Apply)

Why Buy From Us?

☑ Fast Response & Service Times & FREE Shipping: You will always reach a real person.

☑ Real, Friendly, Expert Staff Trusted By Thousands of Home Owners and Contractors!

☑ Price Match Guarantee Ensures You'll Receive The Best Deal Online Even After Your Purchase.

☑ Authorized Retailer For All Brands: Only new warrantied equipment for peace of mind.

Shipping & Handling For Exaco

Handling Time: Ships in 5 to 9 business days. Custom items may take longer.

Shipping Time: Please allow 2-9 business days for delivery to your curbside.

Our goal is to get your order to you as quickly as possible. This item ships to all States of the contiguous U.S.A (lower 48). Please note that all shipments over 100lbs go by LTL freight. For more information check out our Shipping Policy.

Cancellation/Return Policy For Exaco

Return Policy: Exaco generally does not accept returns as everything is built to order. Exceptions apply.

Any order can be canceled within 24 hours of payment.

After 24 hours, most orders will be packed and placed for pickup by the shipping carriers. Once picked up, the item will be considered shipped.

Custom, Built-To-Order, on demand products cannot be canceled or refunded after 24 hours, as these products are put into production specifically for your order.

Damaged Items:

All orders are protected by the manufacturer's warranty. We will repair, or replace any item damaged during shipment or faulty upon arrival as long as the documentation is provided.

Questions? We Are Here To Help!

Call Us Now: 725-239-9966
Instant Live Chat: Click to Chat
Mon-Fri: 8am-7pm PST

Your Personal Oasis With The Exaco Modern M23 Greenhouse

Looking for a greenhouse that's a bit different? The Modern Greenhouse ditches the traditional English look for a sleek, one-sided sloping roof. This not only gives it a modern vibe but also adds an extra layer of glass for more.

Whether you've been gardening forever or are just starting out, this greenhouse is a great fit. It's built to last, so it's a smart buy that will make your backyard even better. The extra sunlight and flexible design make it the perfect place for your plants to thrive.

Exaco Janssens M23 modern greenhouse featuring a sloping roof, with a dog resting inside near white garden chairs.

Enjoy Fresh Produce Daily In Your Modern Greenhouse

Year-Round Growing: Extend your growing season and enjoy fresh produce all year long.
Sleek Design: A modern sloping roof maximizes sunlight and ventilation, making it perfect for year-round gardening.
Superior Strength: extra-thick aluminum profiles and stainless steel hardware for a long-lasting structure.
Weatherproof: 4mm tempered glass withstands extreme weather and provides superior insulation.
Simple Assembly: Pre-cut and pre-drilled parts, plus an included foundation frame, make setup a breeze.
Beautiful Look: Large single-piece glass panels create a clean, modern aesthetic.
Pest and Draft Protection: Heavy-duty rubber weather seals keep unwanted guests out.
Safety Tested: Tempered glass is TUV and GS tested for your peace of mind.

Seize this fantastic deal and enhance your garden with a resilient, stylish, and easy-to-assemble greenhouse. Order yours today!

Modern Exaco Janssens M23 greenhouse for vegetables, with a sloping roof, situated in a vibrant garden ready for planting.

What's Included in the Box?

1 Set of Double Hinged Doors

2 Roof Vents, 2 Push Out Side Windows, 1 Louvre Window

1 Automatic + 1 Spindle (Roof), 1 Automatic (Louvre)

Gutters with Downspout

Manuals of Modern M23 Sloping Roof Greenhouse

Modern Sloping Roof Greenhouse Assembly and Foundation Document

Modern Sloping Roof Greenhouse Updated Assembly Manual in US Measurements

Warranty Document

Specs of the M23 Sloping Roof Modern Greenhouse

Size	7ft 9in x 10ft 2in x 8'10in
Sidewall Height (shorter side)	6'8"
Peak Height (Taller Side)	8' 10"
Area	79 sq. ft.
Color	Black (RAL9005)
Glazing	4 mm tempered glass, 7 times stronger than garden glass, TUV & GS tested
Windows Installation	Substantial rubber seals for better insulation, not metal clips
Glass Configuration	Single sheets, no overlapping smaller sections
Included Features	Gutters with downspouts
Foundation Requirement	Perimeter foundation; corners recommended to anchor in concrete
Additional Requirements (if applicable)	Drop door kit for stem wall installation, glass panel for door gap
Assembly Recommendation	Use scaffolding during assembly
Brand	Janssens
Warranty	15 Year Limited Warranty

Go Beyond the Basics, Accessories to Help Your Garden Thrive

Maintain the perfect growing environment year-round with climate control options like shade curtains, fans, and heaters. Maximize your growing space and organization with shelves, hooks, and specialized grow lights. Enhance your greenhouse experience with practical features such as wheelbarrow ramps and automatic window openers.

Grow More with Organized Shelving

Top Shelf

This sturdy top shelf adds space to your greenhouse so you can store tools, pots, or show off your prize-winning blooms. Available in dark green or black, it's the perfect way to make your greenhouse more functional and stylish, measuring 10' L x 4" W

Elevated greenhouse staging with green frame and white tray liner, ideal for seed starting and plant propagation.

Bottom Shelf (Seed Tray)

This shelf with it's size of 10' L x 20" W x 4" D is perfect for starting seeds, propagating cuttings, or organizing small plants. Corrugated plastic bottom provide ample space and drainage. Choose from classic dark green or sleek black to match your greenhouse aesthetic.

Exaco Royal Victorian Slat Shelving 2 slats in black

Slat Shelving - 2 & 5 Slats

Expand your growing space with our affordable slatted shelving, designed to fit all Victorian Greenhouses. Choose from a 2-slat (9"W x 59"L) or 5-slat (21"W x 59"L) configuration, both available in black or dark green.

Customize Door for Effortless Access

Janssens Royal Victorian Greenhouse with stylish black frame and glass panels, furnished as an outdoor living space with a fire pit and wicker furniture.

Sliding Doors - Single or Double Configuration

Choose the perfect entryway for your greenhouse with a single or double door in a matching black or green finish. Both sizes offer a low threshold option for easy access.

Janssens Greenhouse Double Hinged Door - perfect for wide entryways and easy access in your backyard greenhouse.

Hinged Double Doors Configuration

Create a welcoming entry to your greenhouse with a double hinged door featuring a low threshold for easy access. Available in black or green to complement your greenhouse's style, these doors come with locks for added security.

Janssens Greenhouse Double Hinged Door with black frame and glass panels - easy access and wide entryway for your backyard greenhouse.

Drop Door Kit for Hinged Doors & Sliding Doors

Allows Modern greenhouse on a 20"-36" wall (24" recommended). Glass panels not included; purchase locally. Extra polycarbonate available for cutting. Use "Lowered Threshold" for dropped doors. Provide exact wall height for accurate cutting.

Exaco Royal Victorian Lowered Threshold Sliding Door Installation Guide

Low Threshold for Sliding Door

Low threshold entry option kit for double or single sliding doors. Available in colors black and dark green. Cut to fit.

Easily Manage Temperature in Your Greenhouse with Windows and Vents Upgrades

Exaco Royal Victorian greenhouse with adjustable louvre window for ventilation and temperature control.

Additional Louvre Window

Features 11 glass panels and is manually operated to control airflow and temperature in your Modern greenhouse. An automatic opener is also available for added convenience.

Exaco Greenhouse Fly Screen for roof vent, keeps pests out while allowing airflow for optimal plant growth.

Louvre Window Fly Screen

Easily attach this factory-assembled fly screen to the outside of your louvered windows with a simple clip. No tools required! Available in green or black.

Louvre Window Cover

During the winter months, the louvered window is covered by a 40" x 28" piece of 4mm thick clear Lexan, which fits snugly in place without any additional fasteners or attachments.

Janssens Automatic Louvre Vent Opener for greenhouses, regulating temperature and airflow for optimal plant growth.

Automatic Louvre Windows Opener

A black paraffin-filled tube opens and closes the louvre window at 72°F, opening up to 14 inches and closing with a heavy spring as the temperature drops.

Exaco Royal Victorian greenhouse with push-open side window for ventilation.

Push Open Side Windows

Increase ventilation in your greenhouse with a push-open side window, hinged at the top for easy operation. Available in dark green or black, it includes an extra glass panel and measures 40 ½” x 30 ½” to fit seamlessly into your side wall.

Janssens Greenhouse Louvre Window with Fly Screen for ventilation and pest control

Push Out Side Window Fly Screen

Easily install this factory-assembled fly screen inside your push-out window. Available in green or black, it features a brush seal opening for the window device.

Exaco Royal Victorian greenhouse roof vents open for ventilation, with sunlight shining through.

Additional Roof Vents

Every Modern greenhouse includes at least one roof vent for ventilation. You can add more vents to customize your greenhouse climate. All vents are available in dark green or black and measure 30 ½” x 32 ½”.

A detailed view of a Janssens Greenhouse showcasing the automatic roof vent in an open position, and the fly screen protecting the interior.

Roof Vent Fly Screen

Factory-assembled fly screen for roof vents, easily installs underneath the vent window and comes with brush seals that allow compatibility with automatic or manual openers. Choose from green or black frames.

Exaco Royal Victorian Automatic roof vent opener for greenhouses, regulating temperature and airflow for optimal plant growth.

Automatic Roof Window Opener

Automatically regulate the temperature in your Modern greenhouse with this black paraffin-filled tube opener. No electricity needed, it expands at 72°F to open the window up to 14 inches and closes with a heavy spring when it cools.

Manual Roof Window Opener

Manually open your Modern greenhouse roof window with this stainless steel threaded screw opener. A long handle is required for operation (not included).

Perfect Climate with Janssens Modern Greenhouse Add-Ons for Consistent Growing

Retractable shade system for Exaco Janssen Modern and Royal Victorian greenhouses, provides temperature control and protects plants from excessive sunlight.

Retractable Roll-Up Shade Curtain

The retractable aluminum weave curtains, suitable for both roofs and side walls, reflect sunlight for enhanced cooling and extend up to 8 feet, adapting to weather conditions.

Exaco Janssens Royal Victorian VI Accessory Kit vi23, vi34, vi36 & vi46 cloth shade

Shade Curtains

This cream shade curtain is tailor-made for your Modern Greenhouse. It provides full coverage and easy installation with built-in loops and included hardware. Durable and elegant, it protects your plants while enhancing your greenhouse's look.

Exaco Bio Greean Palma Greenhouse Heater 110V in white background

Bio Green Palma Greenhouse Heater

This lightweight, portable heater delivers 1500 watts (5118 BTU) of power, making it ideal for smaller greenhouses. It features a built-in thermostat for efficient temperature control (0-90°F) and can be paired with the optional Thermo2 digital thermostat for even greater precision.

Exaco Bio Green Thermostat in white background

Bio Green Thermo2 Digital Thermostat

This digital thermostat offers precise control (-58°F to 108°F) with Fahrenheit/Celsius display and summer/winter modes. It supports up to 1500W/5200 BTU heaters and has a 9.1ft sensor. Pair with a Palma heater for optimal greenhouse climate.

Exaco Solar Exhaust Fan System

Solar-powered greenhouse exhaust fan kit with 50-watt solar panel, 16" CE-approved fan, thermostat, and 20-foot cord. No batteries required. Lifetime warranty on the brushless motor. 31 lbs total weight.

Exaco Victorian Greenhouse Accessory red heater for heating the greenhouse.

Dayton Big Red Heater

This greenhouse heater covers up to 600 sq. ft., with temperature control (37-113℉) and overheating protection. It has a 5600W output (19,110/14,335 BTU at 240V/208V) and is UL/C-UL certified. Requires a NEMA# 6-30R outlet for the included NEMA# 6-30P cord.

Exhaust Vent with Fan

This plug-and-play exhaust fan and vent kit comes with a 110-volt cord and plug, available in 12", 16", or 20" sizes. An optional thermostat with an 8' cord allows for automatic temperature control.

Automated aluminum louver Exaco Modern greenhouse vent for temperature and humidity control.

Intake Shutter Vent

Automated aluminum louver greenhouse vent for temperature and humidity control. Available in 16", 20", and 24" sizes.

Transform Your Greenhouse into an Oasis with These Must-Have Additions

A solar-powered LED light mounted on a white wall.

Solar Powered Light

Solar-powered LED light designed for nighttime greenhouse illumination.

LED Grow Light

This slim, 4-foot LED grow light bar delivers powerful, evenly distributed F3 spectrum light, ideal for plant growth. Choose with or without a power cord and connect up to 15 units for larger areas. Its 12 waterproof LEDs and durable construction ensure long-lasting performance, backed by a 5-year warranty.

Scroll Supports

This set of three dark green scroll supports (two shoulder, one roof), designed specifically for units 20 feet or longer. These stylish additions provide extra reinforcement while elevating your greenhouse's visual appeal. Please note that curtains cannot be drawn past the scroll supports.

Wheelbarrow Ramp

Made from durable solid rubber, its 49cm width, 31cm length, and 10cm height provide a smooth transition for easy loading and unloading.

Victorian greenhouse adjustable metal hooks for hanging plants and accessories.

Stainless Steel Plant Hooks

This set of 5 hooks has a T-bolt head that fits into greenhouse frame channels without modifications. The adjustable design allows you to customize the hanging height.

A pile of stainless steel T-bolts and nuts for greenhouse assembly.