Isokon Flats, also known as Lawn Road Flats and the Isokon building, on Lawn Road in the Belsize Park district of the London Borough of Camden, is a reinforced-concrete block of 36 flats, designed by Canadian engineer Wells Coates for Molly and Jack Pritchard.

The London-based Isokon firm was founded in 1929 by the English entrepreneur Jack Pritchard and the Canadian architect Wells Coates to design and construct modernist houses and flats, and furniture and fittings for them. Originally called Wells Coates and Partners, the name was changed in 1931 to Isokon, a name derived from Isometric Unit Construction, bearing an allusion to Russian Constructivism.