Whether or not house plans need to be stamped will depend on the specific requirements of local building codes and regulations. In general, if the plans require a building permit, they may need to be stamped or sealed by a licensed architect or engineer in order to ensure that they comply with local codes and regulations.
A stamped or sealed set of plans indicates that the plans have been reviewed and approved by a licensed professional who is authorized to certify that the plans are in compliance with all relevant building codes and regulations. This can help to ensure that the building project proceeds smoothly and that the resulting structure is safe and meets all necessary standards.
The specific requirements for stamping or sealing of house plans can vary depending on the jurisdiction and the type of project. Some local building authorities may require all plans to be stamped or sealed, while others may only require this for certain types of projects, such as large commercial buildings or complex residential structures.
If you are planning to build a house and need to obtain a building permit, it's a good idea to consult with your local building department to determine whether stamped or sealed plans will be required for your specific project. A licensed architect or engineer can also provide guidance on whether stamping or sealing will be necessary, and can help you ensure that the plans comply with all relevant building codes and regulations.