The competition is open to any team provided the following conditions are met:

• At least three students shall compose the team.
•  At least one of the team members must be attending a university in a REHVA member country, see HERE.
• All team members must be enrolled at a post-secondary educational institution (e.g., college, university, etc.) at least during the competition period, September 2024 throughout February 2025.

HBDB25 encourages the participation of multi-disciplinary teams that consist of students of different backgrounds (e.g., architecture, building physics, HVAC technology, environmental sciences, etc.). Teams can include a maximum of 2 non-student supervisors who can only operate in an advisory or coaching capacity.