There are suggestions of how to integrate biodiversity-friendly measures into both architecture and landscape architecture, however it is unclear how to systematically include the needs of other organisms such as animals. One particular challenge is the conflict between amenity and biodiversity, as the human designer aims for good design, which often appears to be incompatible with biodiversity-friendly measures. Here we describe ‘Animal-Aided Design’ (AAD) as a methodology to systematically include animals into the planning cycle of project-based planning. The basic idea of AAD is to make animals an integral part of the design and define their needs at the beginning of the planning process. The requirements of target species then set boundary conditions for the planning process, but also serve as an inspiration for the design itself. We illustrate our methodology using theoretical examples, mostly from Western Europe, in particular Germany.