Greenhouse plans – 8’x8′, plans include a free PDF download (link at bottom of blog post), step-by-step illustrated instructions, cutting list, and shopping list.
Foundation
4 – 4×4 (pressure treated) – 8′
Side Walls
Front/Back Wall
Wall Brace
Roof
Door
Vent/Window
Trim
Hardware
3 1/2″ deck screws
1 1/4″ deck screws
3 1/2″ galvanized nails
3″ galvanized nails
Foundation
4 – 4×4 (pressure treated) – 8′
Side Walls
10 – 2×4 – 1′ 10 1/2″
8 – 1×4 – 3′ 2 11/16″ (45 degree angle cuts on both end, same direction)
Front/Back Wall
8 – 1×4 – 3′ 5 1/8″ (45 degree angle cuts on both end, same direction)
Roof
10 – 2×4 – 4′ 2 7/16″
Door
Vent/Window
12 – 2×2 – 1′ 10 1/2″
Trim
48 – 1×2 – 8′ (cut to size)
Use four pressure treated 4×4’s 8′ long for the foundation. Notch the corners as shown on illustration above. Secure the corners using 3 1/2″ screws. To keep the foundation from shifting secure it down with wood spikes.
Build the side walls using 2×4’s. Cut four 2×4’s to 8′ for the top and bottom plate. Cut ten 2×4’s to 6′ for the wall studs. Install as shown on illustration above using 3 1/2″ nails.
Cut eight 1×4’s to 3′ 2 11/16″ for the wall brace. The ends will have 45 degree angle cuts in the same direction. Notch the wall studs around the brace as shown on illustration above. Nail 3″ nails through the brace and into the studs.
Cut ten 2×4’s to 1′ 10 1/2″ to make the vent/window frames, install as shown above using 3 1/2″ nails.
Build the front and back wall using 2×4’s. Cut four 2×4’s to 7′ 5″ for the top and bottom plate. Cut eight 2×4’s 6′ long for the studs. Install as shown on illustration above using 3 1/2″ nails.
Cut eight 1×4’s to 3′ 5 1/8″ for the wall brace. The ends will have 45 degree angle cuts in the same direction. Notch the wall studs around the brace as shown on illustration above. Nail 3″ nails through the brace and into the studs.
Build the top ridge using a 2×4. Cut two 2×4’s to 1′ 2 3/8″ long and one 2×4 to 8′ long. Assemble as shown on illustration above using 3 1/2″ nails.
Remove the 2×4 plate on the door entrance as shown on illustration above.
Cut ten 2×4’s to 4′ 2 7/16″ long for the rafters. Cut the ends of the rafters as shown on illustration above.
Install the rafters as shown on illustration above using 3 1/2″ nails. Notch the rafters and install a 1×4 brace to the roof. Nail 3″ nails through the brace and into the rafters.
Cut two 2×4’s to 8′ long, rip the 2×4’s to 2 9/16″, cut an 18 degree bevel cut to the edge. Nail 3 1/2″ nails through the 2×4 and into the rafters.
Install the greenhouse plastic using staples.
Cut 1×2 trim to size and install as show on illustration above. To make replacing the plastic easier if required use 1 1/4″ deck screws, screw through the 1×2 trim and into the frame.
Build the door frame using 2×2’s. Cut two 2×2’s to 6′ 1 1/2″ long and three 2×2’s to 3′ long. Notch and assemble as shown on illustration above using 1 1/4″ deck screws.
Staple the greenhouse plastic to the door frame. Cut 1×2 trim to size and install over plastic, screw 1 1/4″ deck screws through the trim and into the frame. Install hinges and door handle.
Build the window/vent frames using 2×2’s. Cut twelve 2×2’s to 1′ 10 1/2″ long and twelve 2×2’s to 2′ long. Notch the corners and assemble using 1 1/4″ deck screws.
Staple the greenhouse plastic to the window/ vent frame. Cut 1×2 trim to size and install over plastic, screw 1 1/4″ deck screws through the trim and into the frame. Install the hinges to the window/vents.
Install door and window/vents.
Like these greenhouse plans? Let me know, leave me a comment below. Share this link with your friends and your social media, thanks.
Dear Jake, thank you for sharing your drawings for all the variety of DIY projects. Do you have a recommendation (or 2) for the type of plastic sheeting and thickness to use in the Florida sun? (I’ve bought so-called UV plastic from ‘big box’ stores but it really doesn’t last much longer than regular 6 or 9 mil material.) And a comment on blue bird houses: In northern Florida I built 4 blue bird houses and the entrance hole is only 1″ to 1-1/8″ dia. This hole size eliminates competition from blue jays and some other ‘nesting’ birds. All 4 were occupied last year. I bought another blue bird house made from cedar, versus treated southern pine, and only the chick-a-dees used it. Thanks again for sending me your DIY project plans. Several will be utilized after I finish another deck. Happy holidays,
Steve
I’m new to gardening so this may be a crazy question. But, what are the hatches at the bottom used for? We love the plan and are going to start it next week!
plan superbe, travail facilité mais j’ai encore du mal avec les mesures en pouces.Love the 8×8 green house plans! My question is, do you have instructions on how to place the plastic on? Thank you 😊
Be happy to build this is Spring next year. I have made a site ready in long wide flower border. Bricked a base and can use your total design on longer earth pegs at 3 feet down and concreted in as wind can be troublesome at times
Jeffrey Bush If doing a 6×6 square greenhouse what should the studs be set at? Emilio MarrelloThank you for this overall design. I am building something between a green and hoop grow house.
The huge time saver for my project is the 4 x 4 base which I am placing on 18-inch deck posts. These allow me to make the foundation frame and then balance the elevations.
The sold foundation allows me to treat the rest of the build with ease.
Our zoning is such that this build is not treated as permanent, the benefits are many.
The tricky part that I have seen anywhere online is the top ridgeline where the poly will drape over the edge. With a greenhouse, no issue as the plastic sheets will overhang.
Many online promote a 2×2 furring strip at the top, this is a long-term recipe for failure as water and snow will dam up at his point. I have engineered a tuck and fold system so water can run right off the poly, this will add a great deal of life and issues.
Hi I love this design! I would like to know if it’s possible to get it in 100sqft? 10×10 plan? Thank you!
I’m looking to use 4×8 polycarbonate sheets. Does this work with these plans as far as a little amount?
Regina Strickland-WestMay I ask, how can I adjust these plans for an 8×16 greenhouse? Also, I’m looking to use 4′ x 2’Polycarbonate Sheets Twin-Wall Roof Panels
