There are various requirements that need to be considered when it comes to interior design or architecture design, and these can vary depending on the specific project, location, and applicable regulations. Here are some general requirements to keep in mind:

1. Building codes and regulations: There are various building codes and regulations that govern the design, construction, and safety of buildings. These codes can cover everything from the height and size of the building to the materials used and the accessibility features required.
2. Accessibility: It is important to ensure that buildings are accessible to people with disabilities, including features such as wheelchair ramps, accessible bathrooms, and wider doorways.
3. Environmental sustainability: As a society, we have become increasingly aware of the impact our buildings have on the environment. Therefore, it is important to consider sustainable design features that can reduce energy consumption, water usage, and waste production.
4. Functionality: Interior design and architecture must serve their intended purpose. It is important to consider how people will use the space and design it accordingly.
5. Aesthetics: The design of a building must also be visually appealing structures and in line with the client’s vision.

These are just a few of the many requirements that need to be considered when designing a building. It is always a good idea to consult with a professional like architects in the field and to be familiar with the specific regulations and requirements that apply to the project at hand.