Blenheim Palace Butterfly House

Blenheim's Butterfly House stands in the estate's Walled Garden, about 600 m south-east of the palace, where Historic England's register of parks and gardens describes a rectangular kitchen garden of three hectares built around 1710 by the masons Thomas Churchill and Richard Stacey. According to the estate, the tropical house has welcomed visitors since the early 1980s; the BBC adds that it was originally set up by John Spencer-Churchill, 11th Duke of Marlborough, and had closed in October before its article of 24 April 2014. That day the BBC announced the opening of a new £100,000 structure replacing it, with hundreds of butterflies released (blue mountain, owl and monarch) and pupae from Malaysia, Thailand and the Philippines; head of gardens Hilary Wood said the work had safeguarded the building for many years to come.

The BBC also stresses the link with Winston Churchill, born at Blenheim on 30 November 1874: the future prime minister bred butterflies and set up a butterfly house at Chartwell. In 2018 more than 5,000 butterflies were released for the February half-term. The house was renovated again in 2024, with improved access and a more immersive setting.

The present structure is a bespoke glasshouse: the English manufacturer Hartley Botanic, which builds aluminium glasshouses, lists 'The Butterfly House – Blenheim Palace' among the sites where its structures can be seen, and its gallery of bespoke glasshouses includes a photograph of it, showing a long glass-roofed house at the end of a formal garden. The estate's own page calls it a 'tropical oasis' renovated in 2024.

The interior imitates the butterflies' habitat: a tropical climate, backdrop plants from Africa, Madeira and South America, sugar bowls and fruit for the butterflies to feed on. The 2024 renovation aimed at accessibility and a more immersive route. On the Butterfly House's official page, the photograph of the interior shows visitors in a planted glasshouse under a clear roof with fine glazing bars.

In 2024 the estate names the Red Lacewing, the Emerald Peacock and the Blue Wave among its butterflies, with plants from Africa, Madeira and South America; in spring, amaryllis and fritillaries add splashes of colour. The butterflies' diet gives more room to tropical fruit (pineapple, mango, papaya) to echo their wild food. Press articles of 2014 and 2018 mention blue morphos, owl butterflies and monarchs, pupae from Africa, Malaysia, Thailand and the Philippines, and flowers planted to feed them (marguerites, black-eyed Susans, hydrangeas, hibiscus).

A colony of zebra finches shares the house with the butterflies, according to the local press in 2018 and the estate in 2021. The species on show change with each release; no fixed inventory was found.

The Butterfly House is in the Walled Garden, which is reached from the palace by Blenheim's miniature train. The official Walled Garden page says it is open all year round, without detailing the butterfly house itself; it is worth checking the calendar and access conditions before a visit. Allow half an hour to an hour with the other attractions of the Walled Garden: the Marlborough Maze (two miles of yew), Adventure Play, the pizzeria and the Rowse Honey Hive. Dogs are not allowed in the Walled Garden.

The palace, its formal gardens, the Orangery restaurant and the landscaped park (a World Heritage Site) combine with the visit.