Gleniffer Brae, Heritage-listed manor in Keiraville, New South Wales, Australia.

Gleniffer Brae is a single-storey bungalow complex of brick with sandstone trim, built 1937–39 to Geoffrey D. Loveridge's design. Its steeply pitched, multi-gabled roof and Tudor arches with diamond-patterned windows unify a group of single-storey buildings.

Sidney Hoskins, a founder of the Australian Iron and Steel works at Port Kembla, bought 75 acres of Fitzgerald's dairy farm in 1928 and commissioned his brother-in-law Geoffrey Loveridge to design the house. L. Benbow built it from 1937 to 1939, with joinery by W. W. Todd & Son and stone from the Hawkesbury Sandstone Co. The Anglican Diocese of Sydney ran SCEGGS here from 1954 to 1975, and the council acquired the grounds in 1978.

The name comes from a village near Paisley in Scotland and reflects family heritage. The land holds deep significance for the Dharawal Aboriginal people.

The house and grounds are owned by Wollongong City Council and sit next to the Wollongong Botanic Garden, which opened to the public regularly in 1971. Access to the manor depends on the conservatorium's teaching and event schedule, so confirm opening times before visiting. The garden paths around the property connect Murphys Avenue with Northfields Avenue.

Sidney Hoskins's gardener Eric Winter received 2.5 acres on the property's eastern boundary in 1921, including a cottage called Cratloe. That cottage, bought back by the council in 1966, now serves as the Discovery Centre of the Wollongong Botanic Garden, next to the manor grounds.