Check The Local Building Codes

In your bathroom layout & space planning concepts, forget about doing any electrical or plumbing jobs yourself. Leave that to a licensed professional. That professional will also be aware of the local building codes to make sure your bathroom is not only legal, but safe. But if you are planning any major bathroom layout & space planning, such as knocking a wall down to add a windmill (hey, it could happen), you better check with your local zoning board to see if you are allowed to do so, or if you need a building permit.