Turns out, it's the Lawrence and Martha Joseph Residence and Apartments, and yes, there are real
The cottages, nicknamed "The Hobbit Houses," were designed by former Disney artist Lawrence Joseph, who was also a skilled carpenter. He worked on it from 1946-1970, and apparently there are no right angles in the complex.
From the LA Conservancy's website:
The Joseph Residence and Apartments is one of the most significant examples of Storybook architecture in Los Angeles. The sweeping shingled roofs, diamond-paned windows, and clinker-brick chimneys exemplify the fanciful Storybook style, which took inspiration from idealized interpretations of European cottages.