The criteria for calling a basement room a bedroom can vary depending on local building codes, zoning regulations, and safety standards. Generally, to designate a basement room as a bedroom, it must meet certain requirements:

1. Egress Window: One of the most critical requirements is having a proper egress window in the basement bedroom. An egress window is a large window that serves as an emergency exit in case of fire or other emergencies. It must be of a certain size and easy to open, allowing occupants to escape safely. This window also ensures that there is sufficient natural light and ventilation in the room.

2. Ceiling Height: Local building codes typically specify a minimum ceiling height for habitable rooms. Basement bedrooms usually need to have ceilings that are a certain height (often around 7 feet) to ensure adequate headroom and comfort.

3. Ventilation and Air Circulation: Basements tend to have higher humidity levels, so proper ventilation and air circulation are crucial for a habitable bedroom. Adequate heating and cooling should also be considered to maintain a comfortable temperature year-round.

4. Permits and Inspections: Before designating a basement room as a bedroom, you may need to obtain the appropriate building permits and undergo inspections by the local building authority. This ensures that the room meets safety and building code requirements.

5. Escape Routes: Besides the egress window, having proper escape routes from the basement bedroom is essential. It should have direct access to a hallway or stairway leading to the ground floor.

6. Lighting and Electrical Outlets: The room should have sufficient lighting, and there must be enough electrical outlets to meet the electrical code requirements.

7. Adequate Size: There might be minimum size requirements for bedrooms, including basement bedrooms. This ensures that the room is spacious enough to accommodate a bed and other necessary furniture comfortably.

Remember that building codes and regulations can vary between jurisdictions, so it's essential to check with your local building department or zoning authority to understand the specific requirements for designating a basement room as a bedroom in your area. Failing to meet these requirements could lead to safety hazards and potential legal issues when selling or renting the property in the future.