Building a nationwide residential property management company. LEENAN is a Property Management Technology company that specializes in Residential Property Management. We purchase residential property management companies and use our industry leading technology and support systems to deliver the highest level of customer service. LEENAN is led by a team of experienced professionals that invests in its people and process to innovate the residential property management industry. Our technology based products and services help owners of rental properties reach their financial goals and provide tenants with a safe place to call home.