In the 1870s Monreith Estate covered about 16,000 acres (65 km), and the Monreith House is surrounded by woodlands and looks towards the White Loch of Myrton in the Mochrum area.
The grounds of the house are included in the Inventory of Gardens and Designed Landscapes in Scotland, the national listing of significant gardens, and are classed as "outstanding" in five out of six categories. 
