This step by step diy project is about 12×16 greenhouse plans. I have designed this medium sized greenhouse so you can grow fresh vegetables in your own backyard. This is a sturdy greenhouse that is also easy to build, because you need mainly 2x4s, which are available in all diy stores. Take a look over the rest of my woodworking plans, if you want to get more building inspiration.
When buying the lumber, you should select the planks with great care, making sure they are straight and without any visible flaws (cracks, knots, twists, decay). Investing in cedar or other weather resistant lumber is a good idea, as it will pay off on the long run. Use a spirit level to plumb and align the components, before inserting the galvanized screws, otherwise the project won’t have a symmetrical look. If you have all the materials and tools required for the project, you could get the job done in about a day.
Projects made from these plans
12×16 Greenhouse – Free PDF Plans
- A – 2 pieces of 4×4 lumber – 144″ long, 2 pieces – 192″ long BASE
- B – 5 pieces of 2×4 lumber – 16″ long ANCHORS
- C – 2 pieces of 2×4 lumber – 192″ long, 9 pieces – 72″ long, 4 pieces – 22 1/2″ long SIDE WALL
- D – 2 pieces of 2×4 lumber – 192″ long, 9 pieces – 72″ long SIDE WALL
- E – 2 pieces of 2×4 lumber – 137″ long, 7 pieces – 72″ long 2xFRONT WALL
- F – 2 pieces of 2×4 lumber – 25 5/8″ long, 1 piece of 2×6 lumber – 192″ long RIDGE BEAM
- PART 1: 12×16 Greenhouse Plans
- PART 2: 12×16 Greenhouse Plans – Part 2
How to build a 12×16 greenhouse
The first step of the project is to build the base for the greenhouse. Therefore, you should use 4×4 pressure treated beams, because they are resistant to moisture. Use a circular saw to male the notches to both ends of the beams. Smooth the recess with a chisel.
Selecting the location for the greenhouse is essential for the project, as most plans need plenty of direct sun light. Therefore, choose a location that is exposed to the south and then level the surface thoroughly. Lay the beams and align the corners. Drill pilot holes and insert 3 1/2″ screws to lock everything together tightly.
Use 2x4s for the stakes. Make the angle cuts at one end of the stakes with a miter saw. Use pressure treated lumber for these components as they will be exposed to moisture.
Fit the anchors along the sides skids and then insert them to the ground till they are flush with the beams. Use 2 1/2″ screws to secure the stakes to the base of the greenhouse. This is a very simple method to anchor the greenhouse to the ground, but make sure you adjust the depth of the skids according to the winds in your particular location.
Use 2×4 lumber for the side wall with vents. Drill pilot holes through the plates and insert 3 1/2″ screws into the studs. Place the studs every 24″ on center and align the edges with attention. Make sure the corners are square. Fit the 2×4 supports to create the openings for the vents. Drill pocket holes at both ends of the supports and insert 2 1/2″ screws to lock them to the studs.
Build the other side wall for the greenhouse, in the same manner above. You can add vents to this side, as well, if you consider that helpful.
Build the front and the back wall frames for the 12×16 greenhouse. Drill pilot holes through the plates and insert 3 1/2″ screws into the studs. Frame the door openings for an easy access to the interior. You can adjust the size of the size of the openings to suit your needs.
Lift the wall frames to the base of the greenhouse and plumb them with a spirit level. Drill pilot holes through the base plates and insert 3 1/2″ screws into the base. Drill pilot and insert 3 1/2″ screws to lock the adjacent walls together tightly. Make sure the corners are square and align the edges flush.
Fit the 2×4 supports to the middle of the top plates. Plumb the supports and lock them into place with 2 1/2″ screws. Fit the ridge beam to the top of the supports and make sure the corners are square.
Check out PART 2 of the greenhouse project, where I show you how to build the door and the roof for the greenhouse.
This is a super basic greenhouse, so please don’t be intimidated. You can build this greenhouse in less than one week and you can then start growing vegetables. You can adjust the size of the greenhouse to suit your needs.
This woodworking project was about 12×16 greenhouse plans free. If you want to see more outdoor plans, check out the rest of our step by step projects and follow the instructions to obtain a professional result.