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SKU #: UG1008

Sunshine Gardenhouse Mt. Rainier GardenHouse Extension Kit


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List Price: $1,205.40

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Sunshine Gardenhouse Mt. Rainier GardenHouse Extension Kit

Should you grow out of space, this product extends the length of the Mt. Rainier 8' x 12' GardenHouses by 4 feet to 8' x 16'.


  • Includes easy-to-follow printed instructions, labeled panels, and an excellent assembly video for assembly in less than a day
  • Made with clear natural redwood frame
  • 4.5mm Twin wall polycarbonate
  • Solid base made from organic plastic
  • 5 Year material and workmanship defect warranty


  • Overall: 120" H x 96" W x 48" D
  • Overall Product Weight: 125lbs

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Sunshine Gardenhouse Mt. Rainier GardenHouse Extension Kit

Weights & Dimensions

  • Overall: 120" H x 96" W x 48" D
  • 120'' H x 96'' W x 48'' D, 125 lbs
  • Overall Product Weight: 125lbs


Product Type: Extension kitCountry of Manufacture: United States

About the Manufacturer

At Sunshine GardenHouse, nestled in the Pacific Northwest in Longview, Washington, great pride is taken in bringing the joy of year 'round gardening to folks throughout North America. They've been in business for over 25 years, and building GardenHouses for the last five years. Thousands are in backyards across the country, making Sunshine GardenHouse the best selling greenhouse in America.

Whether driven by the appeal of delicious fresh tomatoes in the dead of winter, a relaxing sanctuary where cell phones are not allowed, or a protected home for their prize orchids, customers are resounding in one thing—they love their Sunshine GardenHouse. Customer feedback includes comments like: "We consider it to be the best purchase we have ever made" or "Your greenhouse has saved me thousands in therapy" or "My husband and I were nervous about building anything, but we put our Sunshine GardenHouse together in 3 hours and it looks wonderful."

Sunshine Gardenhouse works tirelessly to accomplish two things—1) to share the concept of year 'round gardening with all those that share the passion for making things grow, and 2) manufacture the very best looking, easiest to assemble, most durable, most functional, and best greenhouse value.

Sunshine Gardenhouse Mt. Rainier GardenHouse Extension Kit

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When you buy a Sunshine Gardenhouse Mt. Rainier GardenHouse Extension Kit online from Wayfair, we make it as easy as possible for you to find out when your product will be delivered. You can check on a delivery estimate for the Sunshine Gardenhouse Part #: GKP8124EXT here. If you have any questions about your purchase or any other Greenhouse Accessories product for sale our customer service representatives are available to help.Whether you just want to buy a Sunshine Gardenhouse Mt. Rainier GardenHouse Extension Kit or shop for your entire home, Wayfair has a zillion things home.

Sunshine Gardenhouse Mt. Rainier GardenHouse Extension Kit

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Return Policy

We want you to love it. If you don't, you may return your purchase within 30 days of delivery. All you need to do is visit our Self-Service Return Center for instructions. Return credits are issued within 24 hours once the item is received and inspected. Please note that shipping charges are non-refundable. The cost of return shipping will be deducted from your refund.

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OUR SKU # UG1008

Mt. Rainier GardenHouse Extension Kit is also sometimes listed under the following manufacturer numbers: GKP8124EXT