Skip to content
Winter Sale + Free Shipping on most items!
Winter Sale + Free Shipping on most items!

Grandio Summit 12x16 Greenhouse

Save 19% Save 19%
Original price $6,789.00
Original price $6,789.00 - Original price $6,989.00
Original price $6,789.00
Current price $5,49900
$5,499.00 - $6,239.00
Current price $5,49900

  • Amazon
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Venmo
  • Visa
Find a better price? We will beat it!If you find this item cheaper elsewhere (price plus shipping and taxes), please email or call us.*We do not price match past orders, local stores, prices below our costs, and the item must be in stock.

Find a better price? We will beat it!

If you find this item cheaper elsewhere (price plus shipping and taxes), please email or call us.

*We do not price match past orders, local stores, prices below our costs, and the item must be in stock.

Why Pick the Summit 12x16 Greenhouse Kit for Your Garden?

The Summit 12x16 Greenhouse Kit gives you a roomy, sturdy space to grow plants all year round. With a strong aluminum frame and thick panels, it’s built to handle tough weather and keep your plants protected. The classic barn-style design looks great in any yard, combining both style and function. Perfect for beginners and experienced gardeners alike, the Summit 12x16 is a reliable choice for growing success.

BENEFITS

  • Built for Tough Conditions: The Summit 12x16 is crafted with a strong 1.6mm aluminum frame and 10mm twin-wall polycarbonate panels that help keep temperatures stable inside, making it a great option for growing in any season. Its solid structure ensures it can handle various weather conditions, so you can garden confidently year-round.

 

  • Excellent Airflow and Easy Entry: This greenhouse has eight roof windows for plenty of fresh air, essential for keeping plants healthy and happy. The smooth-sliding double doors are hung from above, preventing any jams, and they’re built with durable materials to withstand frequent use, ensuring easy access without hassle.

 

  • Extra Features for Convenience and Stability: The Summit 12x16 comes with helpful additions like rain gutters, a drain kit, a snow load kit, and an anchor kit to keep it steady in any conditions. The doors have durable nylon wheels and lockable handles for security. These features make it low-maintenance and reliable, so you can enjoy it for many seasons to come.

The Summit 12x16 Greenhouse Kit gives you a dependable, spacious, and easy-to-use growing space, making it a great choice for any gardener looking to grow plants all year long.

SPECIFICATIONS

Frame Heavy Duty Aluminum
Color Powder-Coated Green
Panels 10mm Twin-wall UV-protected Polycarbonate
Doors Bind-resistant Sliding Double doors
Latch Magnetic latch doors with key lock
Reinforcement Cross-roof truss and cross-corner bracing
Hardware Stainless steel nuts and bolts
Rain Gutters Yes
Ventilation 8 Roof vents with adjustable manual openers/latches
Wind Rating Withstands winds up to 76 mph*
Snow Rating Maximum snow load of 25lbs./ft² of snow*

DIMENSIONS

  • Actual Size: 12' W x 15.89' L x 9.25' H
  • Door Size: 41.5" W x 85" H

GRANDIO GREENHOUSE MATERIALS VS OTHER BRANDS


WHAT'S INCLUDED IN THE PACKAGE?

Basic Kit Includes:

  • 10mm Twin-Wall Panels
  • (8) Roof Windows
  • Rain Gutters
  • Drain Kit
  • Extreme Snow Load Kit
  • Flat Mount Anchor Kit

Optional Premium Kit Includes:

  • 10mm Twin-Wall Panels
  • (8) Roof Window
  • Rain Gutters
  • Base Kit
  • Drain Kit
  • Extreme Snow Load Kit
  • Flat Mount Anchor Kit
  • (8) Auto Roof Vent Openers
  • (2) Pack of 10 Plant Hangers
  • (1) Trellis Kit
  • (1) Drip Kit
  • (2) 8 oz. Brillianize Cleaner

ASSEMBLY VIDEO


GRANDIO SUMMIT #1 BASE INSTALLATION

GRANDIO SUMMIT #2 ASSEMBLY INSTRUCTION

GRANDIO SUMMIT #3 PARTS LIST

Optional Accessories

Drain Kit - Downspout for Grandio Greenhouse Gutter Systems, designed for installation at each of the four corners of the greenhouse. It’s made to be installed directly into the aluminum frame and gutter of the greenhouse. The easy-to-install downspout drain kit includes (4) 20mm black pipes, (4) gutter attachment gaskets, and (4) side wall brackets with screws. One kit has everything needed to add downspouts to a Grandio Greenhouse.

Automatic Roof Vent Opener - Automatically opens and closes the roof vent window based on temperature changes. The opener contains a metal cylinder with a mineral that expands when heated, pushing a piston to open the vent. When the temperature cools, the mineral contracts, and a spring closes the vent, resetting the piston. The vent opens and closes gradually, allowing the right amount of airflow for cooling.

Auto Louver Window Opener - Automatically opens and closes the louver window as the temperature changes. The opener has a metal cylinder with a mineral that expands when heated, pushing a piston to open the vent. As the temperature cools, the mineral contracts, and a spring closes the vent and resets the piston. The vent opens and closes gradually, providing just the right amount of airflow for cooling. This Auto Louver Opener attaches to the left side of your louver window.

Louver Window - add more ventilation to your greenhouse. Louver window frame comes powder coated in green, with 6mm twin wall polycarbonate panels.

The Drip Irrigation Watering Kit - is a water-efficient system designed for shrubs, trees, flowers, and bushes, covering up to 150 square feet with easy expandability. It's a DIY-friendly installation with no gluing required, using high-quality UV-resistant materials. The kit includes 24 pressure-compensating drippers (20 at 1 GPH, 2 at 2 GPH, and 2 at 4 GPH) for consistent water delivery to plant roots. A backflow preventer ensures water safety by preventing siphoning into the main supply.

Moisture Control Kit - featuring Anti Dust Tape and Waterproof All-Weather Silicone Caulk, protects your Grandio Greenhouse from insects, dirt, mold, and algae. The tape's 45-micron filters allow condensation to escape while preventing algae and mold growth with a fungicidal coating. Combined with the silicone caulk, this kit ensures long-lasting protection and maintains the greenhouse's pristine condition.

Shade Net - are essential for regulating greenhouse temperatures, especially during sunny spring, autumn, and summer days. Designed to reduce intense sunlight by 50%, they help keep your greenhouse cooler and prevent overheating.

Plant Hangers - These versatile plastic hangers are designed for greenhouse use, supporting shade cloths, hanging baskets with quarter-inch hooks, and stringing taller plants or vines. Easy to install, they simply twist into the roof rafter channels.

 

SHIPPING INFO

Lead Time is 1 to 2 days. Orders typically arrive within 1-7 business days, depending on your location:

  • West: 2-4 days
  • Northwest: 1-3 days
  • Southwest: 3-5 days
  • Midwest: 4-6 days
  • East: 5-7 days

Note: Delivery times are estimates and exclude order processing time. Delays may occur due to weather or carrier issues.

With all the online options that exist, why should you put your trust in us and make your purchase from Homestead Supplier?

Small Family Owned - We are a small family owned business and stand behind every product we sell. We have a reputation for treating our customers with respect and integrity, which is why our customers keep coming back!

Customer Service - Our #1 priority is our customer service. We have toll free phone support, live chat during normal business hours, and often our reps can be found answering emails at all hours of the night. We take our customer service very seriously and strive to deliver the best experience for our customers.

Authorized Dealer - All of our products are high quality brand name and all come with a manufacturer warranty. We are authorized dealers for all the brands we carry and stand behind everything we sell. If you are not 100% satisfied with your order, let us know and we will make things right.

Secure Shopping - We offer a safe and secure online shopping experience. We use SSL encryption technology so you never have to worry about the safety of your transaction. Additionally, we never store any credit card information. If you still feel uncomfortable inputting your credit card information online, you can call us and we can take your order over the phone.



We have the best prices around! Happen to find a lower price? We can beat it and then some!


If you find an item cheaper elsewhere (price plus shipping and taxes), please send us an email at info@homesteadsupplier.com or call us at 1-800-540-9051.

 

  •  We do not price match past orders, local stores, club or warehouses and the item must be in stock.
  •  We reserve the right to deny any price match that we would incur a loss on.
  • Please email or call us with the information below:


- Competitor web address (url)
- Price quoted on site
- Details of any promotions
- Your Name
- Your Email Address or Phone Number

Free Shipping - We currently offer free shipping on almost all items over $199 to the contiguous United States. For some heavier and bigger items such as sheds we may charge shipping for some models to some states. All items under $199 have a low shipping rate which can be viewed when checking out.  If you would like your item shipped somewhere outside of the contiguous United States, please email us and we can provide a custom shipping quote.

Order Confirmation - After your order is placed, you will receive an email confirmation which ensures that we have received your order. While we try our best to keep stock and inventory up to date, when we receive your order, we will immediately confirm the item is in stock and ready to ship. In a case an item is on backorder, we will let you know by email or phone. If you choose not to wait until your item is back in stock, we will promptly provide a refund for the item.

Order Shipment - Your item will ship within the designated lead time posted on your product listing page, which varies depending on the product. Once your item has shipped, you will receive an email confirmation with your tracking number and any other shipping information.  Most items require approximately 24 hours for the tracking information to be updated. 

Damages - You should inspect all shipments at the time of delivery. If your shipment is damaged, you should note it with the driver when signing for the delivery. If the item is damaged, please contact us immediately and let us know. Depending on the damage we may be able to send a replacement part if that makes more sense than replacing the item. Please keep all original packaging as damaged items need to be returned in the original packaging. Returns on damaged items need to be approved by customer service before returning.

Incorrect Item - Sometimes mistakes happen and we may ship the wrong item, if that occurs contact us at info@homesteadsupplier.com and we will send out a replacement item provided the return item(s) are received back in the original packaging with all original content. Replacement returns due to our error are NOT subject a restocking charge.

Order Cancellation - If you need to cancel an order, please contact us within 24 hours of placing the order.  If your order has already been processed, you are subject to a 4% cancellation fee. If you would like to cancel after your order has shipped, you will have to follow our return process to return your item. Customized orders and orders that are built, such as sheds, cannot be cancelled once they begin production.

Returns – Many items can be returned for up to 30 days from the delivery date. Customized orders and orders that are built, such as sheds, cannot be returned. To start a return, please email us at sales@homesteadsupplier.com. All products must be returned unopened and in the original packaging.  Reason for return must be provided.  All returns are subject to a 10% - 25% restocking fee which will be deducted from your refund to the same credit card used for your purchase. A Return Authorization Number is required before sending back a return. Please contact our customer service to receive a Return Authorization Number. You will be responsible for all shipping costs for a return unless the return is due to a manufacturing defect or otherwise approved from customer service. If a product is shipped with expedited shipping requested by the customer, the shipping cost is not refundable. Return shipping address will be given when RMA number is issued.  DO NOT ship returns to our corporate mailing address. 

 


QUESTIONS & ANSWERS

Have a Question?

Be the first to ask a question about this.

Ask a Question

Don't Take Our Word For it! Here's What Our Customers Think:

Hats off to Homestead Supplier for superior customer service - these guys go above and beyond to answer all my questions. We purchased the Beach House shed for some extra storage but ended up using it as a backyard playhouse for the kids :). Now we have to buy another shed lol... The shed is great, sturdy, and would recommend to others.

- Sam B.

I found the buying experience to be far better than expected. Very easy to order, received immediate order confirmation, excellent customer service, order showed earlier than expected and in excellent condition. Would definitely recommend

- Dean G.

After 7 months of waiting for our pool to be completed, we are thrilled to have gotten our new shed built. It perfectly completes our backyard renovation. We love it! The instructions were clear, and the building is sturdy. We’ve had a number of inquiries about who we bought our shed kit from.

- Karen E.

Location

We are located in central California and sell online only.

Free Shipping

When you spend $200+

Review Rating

Thousands of
Satisfied Customers.

Give Us A Call

1-800-540-9051

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare