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Accessory Dwelling Units (ADUs)

Field(s):

Community Development, Housing Planning, Land Use & Law

Region of Focus: 

General

Accessory Dwelling Units (ADUs) are secondary housing units located on the same property as a primary residence.


These units can be 

- detached (e.g., a backyard cottage); 

- attached (e.g., a basement apartment)

- or within the primary dwelling (e.g., a converted garage). 


Affordable Housing Potential – ADUs can provide a viable solution to affordable housing shortages by offering additional rental units without requiring large-scale development. They can serve as housing for low-income residents, seniors, or even as affordable workforce housing.


Whilte ADUs can help homeowners increase their income by providing rental opportunities, and they can also foster multigenerational living, planners should be aware of potential impacts on property values, neighborhood character, and infrastructure and services.

Last update: 

April 16, 2025

Developed by:
The Urban Lexis Editorial Team


Contributor(s):

Jing Zhang, AICP


With support from:
ChatGPT (by OpenAI) and DeepSeek


We acknowledge the assistance of AI tools in helping draft content. Final edits, fact-checking, and curatorial decisions were made by the Urban Lexis Editorial Team to ensure quality and relevance for our planning community.



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