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ADU vs Junior ADU

What’s the difference between an ADU and a JADU?

If you’re still learning about ADUs (accessory dwelling unit), it can be confusing. That’s why we want to make it more simple for you.

Meet the JADU (junior accessory dwelling unit). According to the recently passed housing laws at the state level, single-family homeowners are now eligible to add both an ADU and a JADU on their property.

A JADU is a smaller version of an ADU. It is an independent, legally rentable unit that must exist within the existing dwelling unit or an attached accessory structure ( for example: garage).

JADUs offer very interesting construction options which make sense in a number of cases. For example, they may share systems with the original dwelling, leading to simpler renovation plans. Also, they can contain a very simple kitchen with small appliances and share a bathroom with the original accomodation. This all means that the development costs for JADUs are lower. While they can be rented out, they’re typically designed for cohabitation.


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So if you’re particularly ambitious and looking to maximize rental income, home appreciation, and living space, it might make sense to invest in an ADU as well as a JADU; it is your legal right to have both.

One important thing is that JADU’s can only be built on owner-occupied properties. This means that the homeowner cannot possess an ADU if they do not occupy either the JADU or the primary home. Owner occupancy requirements are outlawed for ADUs, but still apply to JADUs, so keep this in mind if you are interested in a JADU.

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