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Riverstone Monticello 4 ft. x 8 ft. Aluminum Greenhouse Extension Kit

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SKU #113259599
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Product Shipping via Common Carrier Freight Truck (LTL)

Orders meeting or exceeding LTL criteria will be converted to ship over the road via a common carrier freight trailer truck.

Someone 18 years of age or older must be present to inspect and sign for delivery of the order.

Call our Customer Solutions Center at 1-877-718-6750 (Option 2, then Option 3) or email us at to arrange the return for order that was delivered via Common Carrier Freight Truck.

Your order will be delivered to the ground level exterior of your home.

Delivery may not be available to all types of addresses. See our Terms & Conditions for details

Depending on the reason for the return, restocking fees may apply, original shipping may not be returned and return shipping may be charged.

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The Riverstone Monticello 4 ft. x 8 ft. Aluminum Greenhouse Extension Kit is specifically designed for the Monticello line of greenhouses. The idea is simple as your gardening greenhouse needs grow so can your greenhouse. The 4 ft. extension kit allows for the expansion of your greenhouse. The design and installation is simple and takes under 2 hours to assemble. The Monticello is proudly made in the USA from start to finish. Each 4 ft. extension kit comes includes a 2 ft. x 2 ft. roof vent with automatic opener and gutters. When ordering your extension kit, make sure that the color matches your existing greenhouse.

  • 97 in. x 97 in. x 90 in.
  • Quick assembly construction
  • Integrated flush base design
  • High impact UV stable 8mm twin wall polycarbonate walls and roof
  • Heavy-duty extruded aluminum frame construction
  • Black electrostatically-painted frame
  • 2 ft. x 2 ft. roof vent with automatic openers
  • Integrated dual rain water gutter system
  • 10 year limited warranty

Note: This product may require up to 7 additional days for order processing prior to shipping