Eildon Mansion, Heritage mansion in St Kilda, Australia

Eildon Mansion is a Renaissance Revival mansion on Grey Street in St Kilda, the largest house in the suburb. Its central block keeps the walls of the 1850 Barham house, with long wings added either side, a loggia joining them at the rear and new facades. Pilasters flank the windows, some arched, those on the added wings forming Palladian windows with pediments, under a balustraded cornice; deep quoins mark each corner of the projecting bays, and the garden facade has a double-level loggia with full-height piers and arcading.

Edward Green built Barham, a Regency-style house designed by John Gill, on this site in 1850. Pastoralist John Lang Currie bought the property in 1869 and had Joseph Reed of Reed & Barnes enlarge it in 1872, when it was renamed Eildon. The central walls of Barham survive inside the later composition. Currie died in 1898, leaving £479,000; the family kept the house until at least 1917, when it was first advertised as a guesthouse.

The house's name comes from Eildon in Scotland, the pastoral district where John Lang Currie ran sheep. Currie's daughter Henrietta held her wedding celebrations in the mansion's ballroom, which the Alliance Française later restored for functions and exhibitions. The Ymer family, who kept the house as a boarding house for over 56 years, housed mainly single men and newly arrived migrants.

Eildon Mansion stands on the east side of Grey Street in St Kilda, its original stables still visible beside the house on the right. The front entrance was once a looped drive with two Grey Street gates; a strip sold to the neighbouring property in the 1940s left only one. The building is privately owned, so the facades and stables are seen from the street.

The property preserves an original section from 1850, making it one of the oldest residential buildings still standing in the area. This core predates the later wave of grand homes that transformed the neighborhood.