The daughter of a well-known homeopathic doctor, Compton-Burnett (pronounced 'Cumpton-Burnit') grew up in Hove and London. Her father had twelve children by two wives and Ivy's mother (the second wife) sent all her stepchildren away to boarding school as soon as possible.
In the author blurb of the old Penguin editions of her novels there was a paragraph written by Compton-Burnett herself:
"I have had such an uneventful life that there is little information to give. I was educated with my brothers in the country as a child, and later went to Holloway College, and took a degree in Classics. I lived with my family when I was quite young but for most of my life have had my own flat in London. I see a good deal of a good many friends, not all of them writing people. And there is really no more to say."
This omits the fact that her favourite brother, Guy, died of pneumonia; another, Noel, was killed on the Somme, and her two youngest sisters, Stephanie Primrose and Catharine (called "Baby" and "Topsy"), died in a suicide pact by taking veronal in their locked bedroom on Christmas Day, 1917. Not one of the twelve siblings had children, and all eight girls remained unmarried.
She spent much of her life as companion to Margaret Jourdain (died 1951), a leading authority on the decorative arts and the history of furniture, who shared the author's Kensington flat from 1919. For the first ten years, Compton-Burnett seems to have remained unobtrusively in the background, always severely dressed in black. When
Pastors and Masters appeared in 1925, Jourdain claimed to have been unaware that her friend was writing a novel.
Compton-Burnett was appointed a Dame Commander of the Order of the British Empire (DBE). She died in 1969 and was cremated at Putney Vale Crematorium.