[1] The school had fifty acres, including playing fields, set on the edge of Dartmoor and including a stretch of the River Tavy.

Mount House School was founded in 1881 by Miss Parker and Miss Tubbs at Alton House, Tavistock Hill, Plymouth.

In 1890 the school moved location to North Hill, Plymouth (now the site of St Matthias church hall[2]), moving in 1900 to larger premises at Mount House, Approach Road, Plymouth (Tubbs's birthplace).

Plymouth was heavily bombed in World War II and the school re-located to a 50-acre site at Mount Tavy in 1940.

The nearby public school Kelly College had long been the destination at age 13 for a good proportion of Mount House pupils, and the two institutions merged in 2014.