Millbrook, Toowoomba, Heritage house in East Toowoomba, Australia.

Millbrook is a large timber house at 9 Phillip Street, East Toowoomba, built between the 1860s and 1900s. It has a high-pitched hipped roof clad in galvanised iron, and a U-shaped verandah broken at the front by a gable pediment over the entrance lobby and a gabled attic room facing the road. Because of the sloping terrain it stands on raised stumps with front stairs.

Millbrook was probably built on Ruthven Street in the 1860s as the family home of William Henry Groom, Toowoomba's first mayor. After Groom died in Melbourne on 8 August 1901, his widow Grace bought land at 9 Phillip Street and had most of the house moved there by June 1902, finding Ruthven Street too busy. One wing was left behind, and higher stumps and new front stairs were built on the sloping site.

Grace Groom, the widow of William Henry Groom, held garden parties at Millbrook and kept presenting school prizes and opening events into her final years. Her granddaughter Noela Brooks recalled a glassed-in northern verandah used for morning tea and a tassel beside the dining room fireplace for calling the maid.

The building is easily visible from the street and sits in a quiet residential area with other heritage properties nearby. Visitors can appreciate the architecture and gardens from public viewpoints as part of exploring the historic quarter.

After Grace Groom died in 1932, Millbrook was briefly vacant before Dr Allan Warren Row and his mother rented it in 1933. Row, Queensland's 1914 Rhodes Scholar, had studied medicine at Oxford and served as a lieutenant with the British Army in World War I before returning to Queensland in 1930. Like most doctors of his time, he set up his surgery in his own house.