John Garrett owned large tracts of land in Bangalore, and some 454 acres of his land was acquired by the British Guardians of the Maharaja of Mysore to build the
Bangalore Palace in 1873. Garrett had already built a European styled manor on these grounds in 1862, and this building was further renovated to the Tudor style, and adding more fortifications. The land was acquired for a sum of BIR 23,000 Further,
Mark Cubbon, the Commissioner of Mysore, acquired 14 acres of land from Garrett, to build his residence the Balabrooie, and this is now the official guesthouse of the Government of Karnataka. Mary Sophia Garrett, John's daughter married to
Benjamin Lewis Rice, an eminent historian, archaeologist and educationist, who also served as the first director of the Mysore State Archaeology Department ==Death==