Cupertino New ADU Policies
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On 11/14/2023, the Planning Commission of Cupertino made significant changes about Accessory Dwelling Unit (ADU) policies. The changes include:
- Allow up to three ADUs on a single family lot (page 19 of the redline)
** Old rule: only one ADU in general, two ADUs with conditions - Increase the height limitation of ADUs (page 20 of the redline)
** Detached, new rule: 18 feet, old rule: 16 feet
** Attached, new rule: 25 feet, old rule: N/A - Two-story ADU allowed (page 20 of the redline)
** Old rule: Only conversion of existing two story part of primary dwelling unit allowed - Two-story permit is eliminated for primary dwelling unit (page 13 of the redline)
No new parking requirement was added for ADUs.
The maximum three ADUs per lot could be in any combination of the following, taking into consideration other existing zoning standards:
- One attached ADU
- One conversion of existing space ADU (whether in principal dwelling unit or existing accessory structure)
- One detached ADU, or
- One Junior ADU
The redline of the changes can be found here. Note: the document was downloaded from City Council item on 12/06/2023. It was uploaded to Google Drive so you don't have to download a pdf file for every click.
The minutes of the meeting can be found here.
- Allow up to three ADUs on a single family lot (page 19 of the redline)
