Only one ADU is allowed on a single-family residential property. ADU’s are not allowed on properties that contain a multi-family dwelling, such as a townhouse. D-ADU’s are allowed on residentially zoned properties with at least 12,000 square feet in size. I-ADU’s are generally allowed on residentially zoned properties that are larger than 6,000 square feet in size, and that front onto a public street that complies with the minimum street width standards. The City Council has adopted a map showing the location of those properties where an I-ADU is prohibited.