The garden at Bronte House is now widely regarded by professionals, connoisseurs and members of the public as one of the finest in Sydney. No plan exists of the original garden, significant parts of which now exist outside the boundary fence.

However, the Australian Heritage Commission considered the remnants to be of sufficient importance to list it on the Register of the National Estate. The Australian Heritage Commission notes that although severely subdivided, the most important section, including natural rock outcrops beneath the house, survives. The east side gives onto grassed terraces apparently reformed with steps, circular concrete pond, flower beds and stone retaining wall. Beneath the wall, down the steeply rocky slope, is the elaborate rockery garden, which is intact with irregular walls and random steps cut or constructed from the rock along the slope. The condition and integrity of the gardens was described as “overgrown and partly destroyed but enough remains of its unique design to make it one of the most important colonial gardens in Australia”.

From the Register of the National Estate
Following extensive restoration work on the house itself, the garden at Bronte House underwent a complete overhaul in the late-1990s and inappropriate trees and shrubs were removed and replaced.
No original drawings or descriptions of the planting survived. However, a drawing made by Georgiana around 1846 (pictured right) provides clear evidence that the specimen of giant bamboo, Bambusa balcoa, in front of the house dates from her time and may well have been planted by her. Two magnificent pines on the northern side of the property, an Araucaria columnaris (also known as Araucaria cookii) and Araucaria heterophylla, were also probably planted in the garden's earliest days, and a Norfolk island pine growing in the centre of the carriage drive. The current fine specimen is a replacement.