News Newsletter Real estate market reports archive Bulletins and real estate insider tips Ginesta in the media Glossary Illusions Real estate market reports Teilen Drucken Controlled rents All A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Civil regulatory principle whereby rents may not exceed the total gross income required to cover costs, and any increase in rent must be justified by a corresponding increase in running costs.