"Meet the designers who make a living building tiny houses on The Sims"

FastCo:

That same interest has translated over to The Sims, in part because building such a small house that can fit all the basics–and that Sims characters can still use–is a difficult proposition in virtual space, too. It’s also appropriate given that The Sims originally began as an architecture simulator, with the Sims themselves existing only to test out how well a house functioned.