ADU (Accessory Dwelling Unit) is a secondary small home on a property, surging 2017+ driven by housing costs, multi-generational living, and rental income potential.
Sources
Design publications, social media trends, and industry analysis 2010-2023.
ADU
Pinterest 2017-10 design active
Updated 2026-02-17
Late 2010s Notable 10 million+ lifetime posts
First documented in October 2017 on Pinterest. Currently active and in regular use across social platforms since 2017.
Also known as: AccessoryDwellingUnitBackyardCottageGrannyFlat
Explore #ADU
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