How To Build a Windmill: Make a Home Windmill

Learn How Build Your Own Windmill to Harness a Renewable Energy Source

Blue windmill

We have provided instructions to build a windmill in this article. To begin, you need to know that there are four basic components to a windmill: a base, a tower, blades, and a nacelle, which is the gearbox that facilitates blade movement. It is highly recommended that the blades and nacelle are bought, instead of attempting to make these yourself, unless  you are very familiar with wind energy and the related physics. Here is some more information to help you build your own windmill.

To build a basic 5-foot high wooden windmill you will need

  • 4 wooden blades - 1-3 feet in length
  • 4 wood planks - ½-inch thick, 5-feet long, 18 inches wide
  • 18 inch square flat piece of wood
  • Sandbag(s) weighing at least 20 pounds
  • Screws&electric screwdriver/drill
  • Nacelle gearbox or simple shaft

Directions for how to build a windmill:

  1. Create a base for your residential windmill that is approximately 18 inches square, and at least 20 pounds, by placing a filled sandbag(s) on a flat piece of plywood. When you make your own windmill, this step is very important. Manufactured bases meet certain standards and your homemade base should do the same.
  2. Screw three of the wood planks together to form a sort of square U shape, and attach this to the base to form the tower. (One side is being left open for the installation of the nacelle/shaft.) 
  3. Assemble the blades, according to the manufacturer's instructions
  4. Attach the blade assembly to the tower, using the nacelle according to the manufacturer's instructions. Alternatively, you can attach the blades using a simple gear shaft. This will not allow you to use your home windmill for power, but the blades will move, and this is a very nice decorative piece. 
  5. If you do want to use this windmill design to generate electricity, you will have to attach it to an energy converter
  6. Complete the tower by joining the remaining wood plank to the open side of the U to form a box
  7. If desired, cover the top of the windmill tower. Additionally, you may wish to paint or whitewash your windmill, especially if it is meant to be primarily a decorative garden accessory piece. 

Now you've learned how to make a windmill and your windmill is complete, and it probably only took you a few hours to do. Please remember, however, that safety is an important factor in any project of this nature, and the windmill blades can be hazardous. Be sure to take all necessary precautions not only when you build a windmill, but when a windmill is in use. But if everyone is safe, and you are finished, all that is left is to enjoy your new windmill.


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