Rancho Mission Viejo is today home to four master-planned communities: the City of Mission Viejo, City of Rancho Santa Margarita, Las Flores, and Ladera Ranch. In 2000, the O’Neill/Avery/Moiso family created a comprehensive open space preservation and land use plan for the remaining 23,000 acres of Rancho Mission Viejo. In 2004, the Ranch Plan was approved by the Orange County Board of Supervisors. That plan has resulted in the creation of The Reserve at Rancho Mission Viejo (a nearly 17,000-acre habitat reserve on the Ranch) and the plan for a new community called Rancho Mission Viejo., which celebrated its grand opening in 2013 with the debut of its first community called Sendero. In Fall 2015, the new community of Esencia celebrated the grand opening of its first 12 neighborhoods as well as host of community amenities. In May 2019, Reata Glen a senior living community opened in Rancho Mission Viejo and received its first residents. It is described in the typology of the architectural specifications as 55+ Service Enriched | Independent Living | Assisted Living | Memory Care | Skilled Nursing | Life Plan Community (CCRC) See (Continuing Care Retirement Communities).