Grandio Greenhouses Sale

Toll Free: 1-866-448-8231



Grandio Greenhouse kits are specifically designed to be extremely simple and easy to install yourself. This is by far the most popular installation option because just about anybody can successfully put together one of our kits. We include comprehensive, easy-to-follow instructions with the greenhouse, and have a variety of assembly videos available online. Plus we have trained staff that are just a phone call away if you ever get stuck!


If you don't have the time or inclination to install the greenhouse kit yourself there are professional contractors all over the nation willing to do the job for you. There are a number of websites you can use to find local contractors including,, and others. We have had the best luck finding installers through the website Thumbtack uses a rating system that is very helpful in vetting and finding the right installer.




  • Normal Price: $10,920.00

Sale: $10,599.00

Please select an anchoring kit option.

Status: In stock and ready to ship


  • Normal Price: $12,340.00

Sale: $10,599.00

Please select an anchoring kit option.

Status: In stock and ready to ship

Welcome to the Grandio Summit 12x32.

  • Basic Kit Includes:
  • 10mm Twin-Wall Panels
  • (16) Roof Windows
  • Rain Gutters
  • Drain Kit
  • Extreme Snow Load Kit
  • Flat Mount Anchor Kit
Actual Size:
12' W x 32' L x 9.25' H
  • Premium Kit Includes:
  • 10mm Twin-Wall Panels
  • (16) Roof Windows
  • Rain Gutters
  • Drain Kit
  • Extreme Snow Load Kit
  • Flat Mount Anchor Kit
  • (16) Auto Roof Window Openers
  • (2) Packs of 10 Plant Hangers
  • (2) 8 oz. Brillianize Cleaner
  • (1) Trellis Kit
  • (1) Drip Kit

This beautiful barn-style greenhouse gives you a year-round growing space with a heavy-duty aluminum frame and 10mm twin-wall polycarbonate panels.

Engineered to perform in harsh environments, the Grandio Summit's rugged durability makes it one of the most insulated greenhouses on the market. Its barn shape design is both elegant and functional, allowing plenty of growing space while looking great in your yard.

Made to meet the highest standards of hobby and professional gardeners alike, the 1.6mm profile aluminum frame provides a stronger and more durable build than its competitors.

The Summit’s range of features and accessories provides a well ventilated growing space with ample roof windows and re-engineered sliding double doors. The UV-protected 10mm paneling has an (R) value of 1.89* and heat loss (U) value of 0.53, allowing for optimal insulation in all climates.

The doors are hung from above which eliminates jamming and the door wheels are made from high-quality nylon for durability. The door wheel bolt is turned from solid brass with a smooth shank to reduce wear. The doors come standard with heavy-duty lockable door handles and included key.

Carefully engineered to the highest standards, gardeners of all types will love the combination of strength, quality, performance, and value that Grandio Greenhouses are known for.

Reach the Summit with Grandio!

Cover Your Bases

Concrete Slab or Wood Deck Installation: If you plan on constructing your Summit on a concrete slab or wooden deck in a controlled or fenced-in environment, the included Flat Mount Base Kit will offer solid footing. The Flat Mount Base Kit includes your choice of anchors for concrete slab or wooden decking.

In-earth Installation: If you plan to install your Grandio Summit Greenhouse directly into the earth, we highly recommend our Steel Base Kit with Earth L-Bolt Anchor Kit. The Steel Base Kit is powder coated to resist rust and decay and is designed to be buried into the ground or back filled with gravel providing a solid foundation to combat wind and other extreme environments. Just select "Base Kit (Earth L-Bolt Anchor Kit)" when you checkout and you'll get everything you need.

Take a closer look
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Grandio Greenhouse: Image 1 of 4 Grandio Greenhouse: Image 2 of 4 Grandio Greenhouse: Image 3 of 4 Grandio Greenhouse: Image 4 of 4

Incredible warranty

Our lifetime frame warranty and 10-year panel warranty do more than give you peace of mind, it's a commitment from us to maintain a high degree of quality, dependability and reliability. Our Grandio Greenhouses are custom made to meet high standards and quality manufacturing to withstand extreme wind and weather conditions.

*R-Value - the measurement of 'insulating ability' of the material. Higher R-Value refers to higher insulation value.

*U-Value - the measurement of 'heat loss' through the material. The lower the U-Value the less heat is escaping.

Technical details for those who need more.

  • Height: 9.5'
  • Width: 12'
  • Length: 32'
  • Frame: Heavy duty aluminum.
  • Color: Powder coated green.
  • Panels: 10mm twin-wall UV protected polycarbonate.
  • Door Size: 41.5" W x 85" H
  • Doors: Bind-resistant sliding double-doors.
  • Latch: Magnetic latch doors with key lock.
  • Reinforcement: Cross-roof truss and cross corner bracing.
  • Tools: Included
  • Hardware: Stainless steel nuts and bolts.
  • Gutters: Built-in rain gutters.
  • Ventilation: (16) roof vent with adjustable manual openers/latches
  • » Frame Warranty: Lifetime
  • » Panel Warranty: 10 years

Grandio Summit Flat Mount Greenhouse Kit Dimensions

Grandio Summit Greenhouse with Steel Base Kit Dimensions

Looking for assembly instructions? Find them here.

This is your resource for finding complete assembly instructions for all Grandio Summit Greenhouses. You can download the instructions in PDF format or you can view the assembly video. We've provided everything you need to get started with your new Grandio greenhouse. Have questions? Give us a call 1-866-448-8231.

Grandio Summit Greenhouse Assembly Manuals

Note: In order to read the manuals, you need the Adobe Acrobat PDF reader.

Accessories to keep you growing

Your neighbors will be green with envy when you load up your greenhouse with these great accessories. Grandio greenhouse accessories add even more convenience and simplicity for your greenhouse.

steel bench
Two Tier Potting Bench

Price: $129.00   

Status: In stock and ready to ship

steel bench
Grandio Summit 12x32 Moisture Control Kit

Price: $299.00   

Status: In stock and ready to ship

You have questions, no problem, we have answers.

How easy is the Grandio to assemble? Very easy. We've designed and perfected the assembly process with you in mind. We provide the tools and a step-by-step assembly manual and video and if you have any problems you can call us at 1-866-448-8231.

Is a building permit required? You may not need a permit for your Grandio, but it is always a good idea check before you get started. We recommend you check local ordinances and requirements before setting up your greenhouse.

Is it strong enough for windy or heavy snow locations? Definitely. Grandio's are all designed to withstand the most hostile environments. We offer additional roof and eave supports to increase the strength and durability of the greenhouse frame for the Summit Greenhouses. Just follow the included directions for securing your greenhouse and you'll enjoy many years of growing with your Grandio.

I live in the hot southwest will Grandio Greenhouses work for me? For people who live in high temperature areas of the country like Arizona, Texas, California, Nevada, or New Mexico we recommend our aluminum shade net. The aluminum shade net reflects the sun on the hottest days to help your greenhouse keep it's cool.

How do the automatic roof vent openers work? The opener has a metal cylinder containing a mineral which expands when heated. This pushes a piston that opens the vent. As the temperature cools, the mineral shrinks and a spring closes the vent and resets the piston. The opening and closing of the vent is gradual allowing just the right amount of air flow for cooling. No electricity needed!

How large is the roof vent opening? The vent opening is 18-3/4" width by 22-3/4” length.

What is the difference in polycarbonate thicknesses? Polycarbonate is available in several different thicknesses and normally comes in single, double, and triple walled sheets that can vary in thickness from 1mm to 10mm. A good rule to remember is that the thicker the panel the better insulation you'll have for your greenhouse.

Can these greenhouse be mounted to a concrete pad? The Grandio comes standard with a base that is meant to anchor it in the soil with concrete footers or a duckbill anchor kit. However, it can be mounted to a concrete pad with additional tools and hardware. For more information please refer to our online manual or give us a call 1-866-448-8231 to discuss options.

Can't wait for your Grandio? Here's what to expect.

How many boxes will I receive?
Your new Grandio ships in 2 or more manageable-sized boxes (the exact number of boxes depends on the size of your greenhouse).

How is it shipped?
Grandio Greenhouses are generally shipped via UPS Ground.

Can I buy a Grandio if I live outside the USA?
Currently we can only ship orders to the USA and Canada. If you live in Canada and would like to place an order please call us at 1-866-448-8231.

How long will my order take to get to me?

  • West: 2-4 business days
  • Northwest: 1-3 business days
  • Southwest: 3-5 business days
  • Midwest: 4-6 business days
  • East: 5-7 business days
  • Note: These are estimates and business days are the time your items are in-transit only and do not include order processing time. Inclement weather and unforeseen carrier or transportation emergencies may delay your delivery.

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