City officials learned hours before the hearing that the home had abruptly closed last week.
Newport Coast co-owner Mike Newman and the center’s attorney, Chris Brancart, could not be reached for comment Tuesday afternoon.
Calls to the center’s main phone line on were answered by a recording stating the number has been disconnected.
Newport Coast came under fire after the mothers of two underage boys, who went in for treatment at the center, testified at a public hearing in July that the boys were not supervised or given adequate care.
Newport Coast and two other local rehabilitation homes, Pacific Shores Recovery and Yellowstone Recovery, are suing Newport Beach in federal court, claiming a city ordinance that the council passed in 2008 discriminates against recovering alcoholics and drug addicts.
Aimed at curbing a growing number of sober-living homes, the ordinance requires most homes to go through a public hearing process and obtain permits to remain open.
A City Council appeals hearing on Pacific Shores Recovery is slated to go forward at 7:30 p.m.