Why is it not recommended to build a bathroom under the staircase?

Building a bathroom under the staircase is generally avoided for several reasons related to feng shui and design principles. Here are some common explanations:

1. Bad Feng Shui: In feng shui, the area under the staircase is often considered unsuitable for important rooms like bathrooms. It's believed that placing a bathroom here can generate negative energy, which may affect the health, prosperity, and harmony of the household.

2. Health Concerns: If the bathroom is located under the stairs, moisture and unpleasant odors could spread to other areas of the house, creating discomfort and potentially affecting the air quality in the home.

3. Space Constraints: The space under the staircase is often limited, and using it for a bathroom can lead to inconvenience, lack of space for comfort, and difficulty cleaning.

4. Lack of Light and Ventilation: Bathrooms require good ventilation and sufficient lighting to ensure that the air is fresh and dry. The area under the staircase typically lacks natural light and sufficient space to install proper ventilation systems.

However, with proper design and construction, some of these issues can be mitigated. Still, in most cases, people prefer to avoid building a bathroom under the staircase to maintain comfort and harmony in the home.