The family seat is Harewood House, near Leeds, Yorkshire. The name of the house, like the title of the barony and earldom, is pronounced "Harwood". The family name is pronounced to rhyme with "tassels". The traditional burial place of the Lascelles Earls of Harewood is All Saints' Church, Harewood. Barons Harewood, second creation (1790)
After becoming the Countess of Harewood upon the death of her father-in-law, Princess Mary moved to Harewood House, and took a keen interest in the interior decoration and renovation of the Lascelles family seat. In farming pursuits, Princess Mary also became an expert in cattle breeding.