My 10' x 20' greenhouse build.
 

I'm building a 10' x 20' greenhouse on the south end of my garage. I thought I would document the progress here. The goal is to grow enough for the wife and I and storing the rest. Th goal is to make it as easy as possible with minimum bending, weeding, and manual labor as I have a bad back, and the wife has RA. :(

Here is the site prep.
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I buried 300' of 1/2" irrigation tubing 4' to 5' underground to be used as a cooler for the reservoir. Never done hydroponics before.
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The greenhouse will have 6' side wall and basically be a lean-to type building. I will use double walled polycarbonate for the panels, and wood frame construction. More to come.

Over Build
 

Spend a little now and over build instead of trying to fix it later. See my GH

I fully intend to whoose... thanks for the reply.

When we (meaning my partner, who wanted to build it all himself) built a 6x8 greenhouse a couple years ago, a friend said, once you have a greenhouse, you'll want a larger one. True! It's full most of the time.

Hi Hab,

I have 4 acres but it's heavily wooded. This is the only spot with sun most of the day. I have the basics designed. The ceiling is 6' and the low end, and 13' 6" at the tall end with a 10' x 20' work area. Roof has a 9/12 pitch, so should shed snow easily. It will have polycarbonate roof and side with screened in ends. There will be polycarbonate end panels that will be removable.

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Anther view.

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Good
 

I would add at least one whole house fan near the peak for ventilation, cheap $100ish