Frogmore Cottage, Grade II listed house in Windsor, England

Frogmore Cottage is a two-storey stucco-faced house built in 1801 on the Frogmore estate in Windsor, listed Grade II since 1975. Its central porch has a triangular gable on two thin columns, with a glazed enclosure to the left and dark double doors to the right; three chimney stacks rise from the pitched roof. In 2020 it was recorded as a 5,089 sq ft (472.8 m2) single residence with five bedrooms, a nursery and four bathrooms.

Built in 1801 for £450 by a Mr Bowen on Queen Charlotte's orders, the cottage was first called Double Garden Cottage and served as a retreat for her and her unmarried daughters. It was listed Grade II in 1975. In 2019 it was converted from five estate-worker units into a single home for the Duke and Duchess of Sussex, who vacated by 2023.

As a royal residence on the Frogmore Estate, the cottage remains a lived-in private space for members of the royal family. Public access is not permitted, distinguishing it from many other historic sites in the area.

The building sits near Windsor Castle within Windsor Home Park but is not open to the public. Visits are not possible as the residence serves as private living space for the royal family.

Queen Victoria breakfasted at the cottage on 28 June 1875 and recorded an "immense number of little frogs", which she called "quite disgusting". The building was first known as Double Garden Cottage and appears in Queen Charlotte's 1801 accounts as built for £450 by a Mr Bowen.