Stellaris effect add_building = command

This command adds <span class="parameter parameter-primary">Building ID</span> to the selected planet. A month after being added, unique buildings will be removed.
Command syntax
effect add_building = <span class="parameter parameter-primary">Building ID</span>
Example
effect add_building = building_fe_dome
How to open the console in Stellaris
Press the ~ / ` key to open the command console. This key is located at the top left of the keyboard, usually under the F1 or ESC key. Type the command and press the Enter key.