Because of the school's growing population, the Pittsburgh Diocese purchased property in Mt. Lebanon and built a new facility for educational and residential programs in 1911.
Founded in 1908 by the Catholic Diocese of Pittsburgh and the Sisters of Charity of Seton Hill, DePaul School for Hearing and Speech has been providing auditory/oral education for children with hearing loss for nearly 100 years. The school was originally known as the Pittsburgh School for the Deaf (and then as DePaul Institute) and was located in the Lappe Mansion on the North Side of Pittsburgh.