Wendy house, also known as a cubby house or play house, is a small toy house.

The name originates from the character of Wendy Darling in J. M. Barrie's play, Peter Pan, or The Boy Who Wouldn't Grow Up. Wendy was injured soon after her arrival in Neverland, so Peter Pan and the Lost Boys build a small house around her where she had fallen. A Wendy house was created by Barrie himself for the first stage production of the play in 1904.

In Northern England Wendy houses are another name for portable survival refuges.

In Northwest England, Wendy houses are play houses for children.