Brownfield rehabilitations provide a unique opportunity to contribute to local sustainable
development, whereby the sustainability of those projects is also considered from
the beginning of the planning process. This implies a specific focus on sustainable
development throughout the project lifecycle, and it is crucial to rehabilitate these
fields by proactively addressing climate challenges and contributing to the evolution
of low or zero-emission districts. In the current paper, the European policy, legal
framework, Hungarian legislation, and strategy documents define the sustainability
aspects and requirements were analysed. Comprehensive terminology was developed, considering
existing methodologies with a particular focus on the Social, Environmental and Climate
Assessment Procedures (SECAP).