Yes, house plans are generally protected by copyright law. The person or company who creates the house plans is the copyright owner, and they have exclusive rights to reproduce, distribute, and display the plans. This means that you cannot legally copy or use someone else's house plans without their permission, unless your use falls under a legal exception such as fair use or you have obtained a license or other permission to use the plans. It's always best to consult with an attorney if you have questions about copyright law and how it applies to specific situations.