Vienna will cover half the cost of adding certain types of exterior sun protection to eligible flats. Vienna residents can claim up to €1,500 towards exterior blinds, shutters or awnings designed to stop their homes overheating during hot weather. AdvertisementTenants must obtain written permission from the building owner or landlord before the blinds are fitted. According to the City of Vienna’s funding page, eligible systems include exterior roller shutters, louvred blinds and vertical façade awnings. You’ll normally need to submit a Bauanzeige, or building notification, to Vienna’s Building Police, known as MA 37.