My tenant has an unexpired lease. Can I serve a notice of intent to sell or to occupy the rental property?

Yes, but you will have to give the greater of 90 days or through the end of the lease terms as the date of termination of the tenancy. An owner can sell or move into their property, but if a tenant has an unexpired lease the owner cannot insist the tenant vacate early. The tenant has a contract through the end of the lease term and does not have to vacate until the end of the term. The owner would have to sell with the tenant in the property unless the parties reach a mutual early termination agreement.