Step 11
Check the height of a freestanding aerial or antenna
![Measurements for a freestanding aerial](/sites/default/files/2017-05/RMI__Aerial_Freestanding%20700x533.png)
Measure the distance from the top of the aerial or antenna to natural ground level.
Is the distance you measured more than 8m?
- If yes, apply for a Building Permit.
- If no, you don't need to apply for a Building Permit. As long as there are no Planning Permit restrictions, you can install the aerial or antenna. You can now exit this guide.