William Porteous

William "Willie" Porteous is an Australian land developer.

Porteous was born, raised and educated in Canada. He attended Simon Fraser University in British Columbia where he attained a Bachelor of Arts Degree in Resource Management and Town Planning. He worked for a short time as a trainee stock broker trader before coming to Australia in September 1970, when he was employed by the Bond Corporation from 1971 to 1979 as their project manager for various large Bond Corporation ventures.

Porteous undertook several substantial property development projects of his own business in Western Australia; whilst engaged in his own property developments activities he was approached and invited to join Acton Consolidated in 1979. He was appointed a director and partner of the Acton Group in 1983 and has remained with the company, specialising in prestige properties and developments. He is best known for his success in the top price range luxury properties and developments, especially in the Western suburbs, and as an auctioneer.

He married Perth socialite Rose Porteous shortly after the death of her husband, Lang Hancock. After residing in the Mosman Park mansion, "Prix d'Amour," for more than a decade they sub-divided the property and are currently in the process of constructing a new "Mini-Amour" over two of the 10 new blocks, designed by Melbourne architect Nicholas Day.