Aircraft noise can affect the value of a property. You can find information here.

Noise compensation –formal expropriations
Legal basis
Federal laws contain practically no regulations regarding noise compensation or direct overflights. As such, the principles for this have been developed by case law.
Every pending legal issue must first be clarified by the competent courts. The procedure is based on the Swiss Federal Law on Expropriation.
For more information on the subject of noise compensation, please consult the German website.