Monticello 4 ft. x 8 ft. Greenhouse Aluminum Finish Extension Kit-MONT-4-AL at The Home Depot
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Monticello 4 ft. x 8 ft. Greenhouse Aluminum Finish Extension Kit

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

Model # MONT-4-AL

Internet # 203192124

$799.99 / each
PRODUCT SOLD :  Online Only
Item cannot be shipped to the following state(s): GU,PR,VI


The Monticello 4 foot extension 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 2 ft. 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 Natural Aluminum frames and will work with the following greenhouses:MONT-8-AL,MONT-12-AL,MONT-16-AL,MONT-20-AL,MONT-24-AL.

  • Heavy duty extruded aluminum frame construction natural aluminum finish
  • High Impact UV stable 8mm commercial grade twin wall polycarbonate walls and roof construction
  • 240 Cu. ft. of space, plenty of space to grow your plants and vegetables
  • Quick assembly construction average time of 4 hours features patented commercial quick turn set screw system
  • Automatic opener roof Vent ( 2 ft. x 2 ft.) opens and closes based on interior temperature to help prevent plant wilting and dry out
  • Integrated flush base design allows for lower then normal door threshold
  • A frame roof design with joist supports allowing for additional snow load capacity and insulation for more economic use
  • Dual low profile easy roll sliding entry doors with locking ability ships fully assembled
  • Integrated dual rain water gutter system
  • Dimensions: 8.1 ft. W x 4.1 ft. L x 7.6 ft. H
  • Proudly designed and made in the USA
  • Full 10 yr warranty strongest in the industry
  • This is the extension kit and must be used with an existing Monticello Greenhouse

Info & Guides

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Approximate Greenhouse Depth (ft.)  Approximate Greenhouse Height (ft.) 
Approximate Greenhouse Width (ft.)  Assembled Depth (in.)  48 in 
Assembled Height (in.)  90 in  Assembled Width (in.)  97.5 in 
Assembly Required  Yes  Frame finish family  Light 
Lockable Door/Gate Latch  No  Manufacturer Warranty  10 Year Limited 
Number of Doors  Number of Vent Openings 
Product Depth (in.)  48  Product Height (in.)  90 
Product Weight (lb.)  60  Product Width (in.)  97.5 
Returnable  90-Day  Shelving Included  No 
Storage Capacity (cu. ft.)  60 



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If product is eligible for shipping to AK, HI and US Territories additional transit time and remote surcharges may apply.