Glenleigh Estate is a heritage-listed private residence located at 427 Mulgoa Road in the western Sydney suburb of Regentville in the City of Penrith local government area of New South Wales, Australia.

After the Grand Tour of Europe, his family immigrated to Sydney in 1849, where his father was appointed headmaster of the York Street Free Church of Scotland school.

He was also director and then chairman of the Australasian Steam Navigation Company In addition he was a magistrate, honorary treasurer of Sydney Hospital and a member of several charities.

Previously living in Darling Point, Woollahra, Ewan's health was failing and it is thought to have prompted his move to the celebrated clean air of the Blue Mountains foothills.

[1] Glenleigh marked a significant departure in Ewan's architectural tastes, his former home Ranelagh, in an Italianate style was befitting of a city merchant, but not a country gentleman.

Documentary evidence to this effect discounts local folklore that Glenleigh was constructed with ballast bricks from one of Ewan's import ships.

It was left to Marion, who lived a further 11 years, to endear the community through her charity work and support of the Presbyterian Church.

To him, wealth enabled him to "indulgence in quieter pursuits, including his family, his involvement in his agricultural interests and the running of his convalescent home for sick servants.

Hazzard's evacuation, as a schoolgirl, from Sydney for fear of Japanese invasion in 1941 to "Glenleigh" by Monticone formed the basis of Dr Montyfiore.

[1] The estate was put up for auction by Raine & Horne in 1984, with 34.9 hectares (86 acres) of grounds with access to the Nepean River and a private boat ramp.

[4][1] Painter William Whittlam was responsible for the three-year project of helping restore Glenleigh's interior paint finishes by scraping away unsympathetic fluoro orange paint a previous owner had applied to engraved brass fire surrounds, removing cream distemper from walls once covered in stencilled butterflies and swirling floral patterns.

Then owner and entrepreneur Fred Grotto had interests in suburban wedding reception centres, food outlet, nursery, manufacturing and photo laboratories.

In the music room Mozart, Haydn and Mendelssohn gaze down from garlanded and gold-leafed frames; in the library Shakespeare, Milton, Scott and Burns hint at Ewan's literary tastes in the 1890s.

The dining room is perhaps the most remarkable - dark green, gilt with cameos of potential ingredients in the form of painted leaping hares, stags at bay, freshly hooked fish and a brace of partridges.

These buildings given their elevation and west, north and easterly aspects, have commanding views of the Nepean Gorge, Blue Mountains and Penrith Valley.

Large timber entrance porch and two-storey verandah to east & south fine interiors with cedar joinery, marble fireplaces, painted & stencilled ceilings.

The front elevation features a bay window extending the full two storeys, the associated roofline in the form of a ziggurat.

[7][1] Two storey brick building with timber framed, pitched slate roof, concrete floor and rendered walls.

[6][1] Of similar construction to the main house, lined internally with plaster and asbestos cement, floor area of 51 square meters.

The house is significant as a rare example of the domestic work of architect W. W. Wardell, who was favoured by the Sydney rising middle class of the 1880s.

While in the form of a country villa, "Glenleigh" is unusual, being constructed and used as a primarily place of residence for the Ewan family.

[1] Glenleigh Estate was listed on the New South Wales State Heritage Register on 2 April 1999 having satisfied the following criteria.

'Glenleigh' is of state significant through its associations with James Ewan, prominent merchant and director of Frazer and Co. - a successful wholesale grocery business, which grew into a substantial mercantile import company.

[1] The place is important in demonstrating aesthetic characteristics and/or a high degree of creative or technical achievement in New South Wales.

[1] The place possesses uncommon, rare or endangered aspects of the cultural or natural history of New South Wales.

[1] The interiors of "Glenleigh" are of state significance as a rare surviving example of Arts and Crafts style decoration.

Examples of Lyon, Cottier & Co.s interior decorations are not altogether rare, what distinguishes "Glenleigh" is the extent of the preservation.