Monticello 8ftx4ft Greenhouse Extension - Black (Premium)

The Monticello 4 foot extension Premium kit is specifically designed for the Monticello line of greenhouses.   The idea is simple, as your gardening greenhouse needs grow so can you 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 4ft extension kit comes includes a 2ft x 2ft roof vent with automatic opener and gutters.

When ordering your extension kit make sure that the color matches your existing greenhouse.  This one is designed specifically for Black frames and will work with the following greenhouses:

  • MONT-8-BK-Premium

  • MONT-12-BK-Premium

  • MONT-16-BK-Premium

  • MONT-20-BK-Premium

  • MONT-24-BK-Premium




  • 8.1 ft W x 4.1 ft. L x 7.6 ft. H

  • 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

  • 1 - 2ft x 2ft roof vent with automatic openers

  • Includes Premium Kit Items:

    • 4 ft Work Bench

    • 4 ft Shade Cloth System

    • 4ft Water System extension with sprinkler

  • Integrated dual rain water gutter system

  • Full 10 yr warranty (strongest in the industry)

Monticello 8ftx4ft Greenhouse  Extension - Black (Premium)
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  • Item #: Mont-4-BK-Premium
  • Manufacturer: Riverstone Industries
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Price $799.99
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