With a group home for recently jailed people with mental illnesses perhaps weeks away from opening in a restored 19th-century Napa mansion, several neighbors in the Old Town district are urging the city to stop, slow or scrutinize the project â however little power local government may have to stand in its way. Gray Haven, a residential care program to be based at the Eliza G. Yount House at 423 Seminary St., got a frosty reception from nearly a dozen people whose letters of opposition were read to the City Council at its Tuesday afternoon meeting. Homeowners branded the Gray Haven home, where clients would spend up to two years of live-in therapy and training to prepare for independent living, will threaten the safety of a neighborhood where Fuller Park and Shearer Elementary School are each a block away â and with apartment buildings and houses next door or across the street.