Windy Hill or Windyhill is a house designed by Charles Rennie Mackintosh and furnished by him and his wife, Margaret Macdonald, in Kilmacolm, Scotland.

[1] Mackintosh not only designed the Art Nouveau-style house, but also, with Macdonald, its decor, furniture and fittings, including fireplaces, panelling, stained glass and lights.

[3] Job books and correspondence relating to the commission are held at the Hunterian Museum, who have made digital scans available online.

[7] The second volume contains service rooms like the kitchen and laundry situated at the end of the previously mentioned hallway, with housemaid and servant bedrooms above it.

[7] The Davidson's son Hamish wrote in article for The Scottish Art Review that fellow passengers on his father's daily train commute compared the design of his house to "a barracks or a prison".