How To Build A Barn Greenhouse

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A well designed greenhouse is important for your plants to last through those cold days. It is almost like you can control the weather. Most of the greenhouses I have seen can only last two to three seasons, as they are not strong enough. That’s why I immediately fall in love with this barn greenhouse design.

This barn greenhouse is sturdy and can last quite many seasons. If you are looking for a serious greenhouse, this design is what you should try. You can grow a lot of veggies and flowers year after year with this greenhouse.

To build this barn greenhouse, you will need


  • 3 pcs 2×4 10’ long Cedar Wood – for back wall
  • 5 pcs 2×4 12’ long Lumber – for sides/ridgepole; do not cut
  • 32 pcs 2×4 8’ long Lumber
  • 11 pcs 12’x26” Corrugated Plastic Greenhouse Panels
  • 1 pc 8’x26” Corrugated Plastic Greenhouse Panel – for door side
  • 3 pcs 12’ long Tin Panels – for sides and back
  • 1 pc 8’ long Tin Panel – for front
  • 28 pcs 4’ long Ribbing Strips
  • L Flashing – optional, for corners
  • Tin Screws
  • 3” Screws
  • Metal Gussets
  • Wood Glue


  • Measuring Tape
  • Square
  • Marker
  • Hammer
  • Drill
  • Circular Saw
  • Compound Miter Saw
  • Carpenter’s Level
  • Countersink Drill Bit
  • Safety Glasses
  • Hearing Protection

Step by step instructions from Ana White

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