Can a contractor use before and after photos without consent?

Generally, a contractor should not use before and after photos without the consent of the property owner or client, as this may violate privacy rights or contractual agreements. If the photos are taken as part of a project, it's best practice to obtain written permission to use them for marketing or promotional purposes. Not doing so could lead to legal issues or damage to the contractor's reputation. Always consult local laws and regulations for specific guidelines.