Katherine Mansfield House and Garden (formerly known as Katherine Mansfield Birthplace) was the early childhood home of Katherine Mansfield, a prominent New Zealand author. The building, located in Thorndon, Wellington, is classified as a "Category I" historic place by Heritage New Zealand.

The house was built during an economic depression in 1888 for Mansfield's father, Harold Beauchamp, and was most likely built to a builder's plan. The site was leasehold. Conditions of the lease required any house on the site to be placed more than 10 feet (3.0 m) from Tinakori Road and of a value exceeding £400. The freehold belonged to the then new baronet, Sir Charles Clifford.^[1]

The two-storey house measures 9.1 metres (30 ft) wide and 12.1 metres (40 ft) long. The ground or lower floor has a drawing room, dining room, bathroom, kitchen, scullery, and lean-to. On the first or upper floor there are four bedrooms and a night nursery.^[2]: 12

The original wallpaper and the ceramics recovered through archaeological excavations both illustrate Katherine's mother's interest in Europe's aesthetic movement.^[3]

Mansfield's family moved into the house in 1888. She was born on October 14, a few months after the move. The initial occupants were her parents; her two sisters, Vera and Charlotte; two aunts, Belle and Kitty, from her mother's side; and her grandmother, Mrs Dyer.^[4] With a servant also on the premises, the living space was crowded. 11-week-old Gwendoline died of cholera in 1891, one of 104 epidemic deaths that year.^[5] The city had many deaths from infectious diseases like typhoid from the mid-1880s because of poor sanitation with sewage collected in open drains to the harbour.^[6][7]

The Beauchamp family moved in 1893 to a more spacious house in then-rural Karori, Chesney Wold.^[8] Harold wrote that the shift was made "for the benefit not only of the children's health but also my own." ^[9] They returned to Thorndon in 1898 to 75 Tinakori Road^{[note 1]} opposite the junction with George Street.^[10] About 1907, they moved to 47 Fitzherbert Terrace, then moved to The Grange in Wadestown in 1916.^[11] Katherine's mother died in the spring of 1918^[12] and her father remarried in January 1920.

Mansfield drew on memories of her childhood home in her short stories "Prelude" (and subsequent novel, The Aloe); "A Birthday"; "The Doll's House", and "The Wind Blows". Mansfield described the house as "[a] dark little cubby hole"^[13] and "[a] horrid little piggy house".^[14]

The Katherine Mansfield Birthplace Society—founded in 1986^[14] by art historian Oroya Day, Peter Young, and the architect James Beard—purchased the property in 1987.^[2] In the late 1980s, the society restored the house to its original condition, undertaking considerable research and relying on Mansfield's own descriptions as well as photographs and "archeological and architectural analyses".^[14] The house and its garden are open to the public.

• Yska, Redmer (2017). A Strange Beautiful Excitement: Katherine Mansfield's Wellington 1888–1903. Dunedin: Otago University Press. ISBN 978-0-947522-54-4.