Is it okay to build a toilet in the store? Do you need the consent of the property or any other unit?

Is there a sewage pipe in your shop? If so, they can be built as long as they don't change their positions. If there is a sewer and you want to move it, you'd better inform the property to facilitate maintenance (you can do it without telling). If there is no sewer in your shop, you need to make your own sewage pipe and discharge it to the sewage main in your community or shopping mall. You have to notify the property, or you won't start work. If there is no property, you can dig the drainage pipe into the municipal sewage main pipe and fight.