Applying for approval to erect aviation obstacles

If you want to erect installations, trees or equipment, for example a crane, the safety of air traffic may be at risk. Deepening the ground may also count as a hazard under certain circumstances. Therefore, under certain conditions, you will need a permit from the relevant aviation authority. Depending on the federal state, you can submit the application in writing or online.

However, if you already have planning permission for your project, additional approval from the aviation authority is not necessary.

A hazard to air traffic arises primarily in the vicinity of airfields, airports or landing sites for helicopters. The height of your building project therefore also depends on its proximity to such a location. When approving an airfield, the aviation authority may stipulate that its consent is required for planning permission in the following cases:

• within a radius of 1.5 kilometers of an airfield for all construction projects
• for structures that are 25 meters higher than the airfield and within a radius of 4 kilometers of the airfield

This area is called the restricted construction protection area. Permission may also be required for very high obstacles or obstacles on elevated ground outside the restricted construction protection area. The relevant aviation authority can provide you with information on the approval requirement for your project.

Submit the application before starting the project. Specify the type of obstacle, the location and the height in meters above ground and in meters above sea level of the top of the obstacle. Also state the date of installation and, in the case of temporary obstacles, the duration until when the obstacle will be in place.