Our largest GardenHouse kits maximize your greenhouse experience. Standing very nearly ten feet tall at the peak and eight feet wide, there is plenty of room for growing and relaxing. Each Mt. Rainier Model is made with a clear natural redwood frame, twin wall polycarbonate and includes four vents with automatic vent openers, Dutch doors and a base made with recycled plastic. With up to four optional benches, you can optimize your space. An optional extension kit is available for the 8' x 12' to add an additional four feet in length, should you grow out of your space. With our pre-assembled panels, you can easily assemble your Mt. Rainier series GardenHouse in less than a day. Also available with an optional wheelchair accessible door that is 39" wide. Each GardenHouse includes easy-to-follow printed instructions, clearly labeled panels, and an excellent assembly video.