The plan of a building can be protected by copyright. Copyright law protects original artistic or literary works, including architectural drawings and plans, considering them creative works. This protection is automatically granted once the plans are fixed in a tangible form, like paper or digital format. Builders and architects can strengthen this protection by registering their plans with the copyright office, adding copyright notices, and using written agreements to assert ownership rights and prevent unauthorized use. Patents, trademarks, or IC layout design protections do not apply to building plans unless there is a novel invention involved in the construction method.