Laws and regulations: In some areas, there may be planning and design requirements to guide or restrict the construction and renovation of houses. You should consult the local construction department or relevant institutions to find out whether you need to apply for a permit or comply with specific regulations.
Structure and layout: changing the orientation of the entrance may involve the adjustment of building structure and house layout. This may require professional design and structural evaluation to ensure the structural safety and stability of the house.
Convenient and practical: changing the direction of the door may have an impact on entering and leaving the house, placing furniture and daily life. Before making a decision, you should consider the convenience and practicality of the house.
To sum up, although we can consider changing the orientation of the porch in self-built houses, we still need to abide by local laws and regulations and make proper planning and evaluation before implementation. It is best to consult professionals, such as architects or engineers, for accurate advice and guidance.