Leasehold, also known as hereditary lease, separates the ownership from the use of a property. The owner does not sell the land to the future users, but grants them a right of use. In return, they pay the owner a regular rent ("ground rent"). The amount of the interest, the type of use and the length of the ground lease are set out in a ground lease contract between the two parties. If the contractual period of the hereditary building right ends without being extended, the former user must be compensated by the owner for the loss of any buildings erected or extended (§27 ErbbauRG).

(from: Glossary on Urban Development for the Common Good, BBSR 2020, p. 57).

In a concept award procedure, the applicants with the best utilization concept are given the opportunity to rent or buy - and not the highest bidders. It is a kind of "competition of ideas" for urban properties, whereby the focus of the competition is usually on public welfare-oriented uses, social participation, lively neighborhoods and sustainable urban development.

(from: Glossary on Community-oriented Urban Development, BBSR 2020, p. 88).

In cities, the areas where you can just let off steam, just do something, are becoming rare. But it is precisely these spaces for experimentation that are important for creating innovations and finding solutions to current local and global problems. In cities, there are many people who want to break new ground together, but for that they absolutely need places to try things out. Future protection areas mark out an area where the city and the future can be shaped together without red tape, where tinkering and failure are expressly permitted! A future protection area can be any kind of space in the city, which is made available for a certain period of time for promising and public welfare-oriented projects. For the moment, future-protected areas are still a theoretical construct, a label, but in the long run they should represent a separate category in the urban land use plan.

(From: Coproductive Places for Innovation and Local Solutions. A future strategy for bottom-up urban development. Betsch et al. 2019)

Third places are spaces beyond one's own home or place of work. They are open places where everyone can stay without constraint. There is no obligation to buy something or to be a member in order to use them. They provide space for the unexpected and socializing. Third places allow people of different ages and social milieus to come together - regardless of social roles or status. Classic third places are, for example, sociocultural centers, lively public squares or neighborhood pubs.

(from: Glossary on Urban Development for the Common Good, BBSR 2020, p. 51; Ray Oldenburg 1992: The Great Good Place)