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Michael Walker, mwalker@cityofnapa.org
Michael Allen, mallen@cityofnapa.org
Ryder Dilley, rdilley@cityofnapa.org
Paul O’Neill, poneill@cityofnapa.org
Angela Alvarez-Cendejas, acendejas@cityofnapa.org
Standards | Details |
|---|---|
Zones allowed | One ADU is allowed on any lot zoned for residential uses that includes an existing or proposed single family or multi-family dwelling unit. One JADU is also permitted per lot zoned for single-family dwellings when it is developed or proposed to be developed with a single-family dwelling. |
Lot Restrictions | Single family dwellings: One ADU or JADU is permitted per lot developed with a single-family dwelling unless the ADU is a detached ADU, in which case a JADU is also permitted. Multifamily dwellings: ADUs may be constructed on lots developed with multifamily dwellings in accordance with California Government Code Section 65852.2(e). |
Minimum Lot Size | None |
Min/Max ADU Size | Minimum: None Both Attached and Detached: Maximum of 1,200 square feet JADUs up to 500 square feet in size and fully within an existing home. |
ADU Building Height | Detached ADU Building Height: 16 feet. Height may be the maximum height for the zoning district allowed with Administrative Permit. Attached ADU Building Height: Maximum height allowed for the zoning district. |
Setbacks | Same setbacks as primary unit for attached ADUs 4 ft side and rear lot line setback for detached or above garage ADUs No additional setback for conversion of existing garage |
Parking Requirements | One parking space per ADU. No parking required if: Within 0.5 miles walking distance of a public transit stop In a designated historic district In part of a principal dwelling unit or an existing accessory structure In an area requiring on-street parking permits but the permits are not offered to the ADU occupant Within one block of a car-sharing pickup/drop-off location. Also, when a garage or other parking structure or area is demolished in conjunction with the construction of an ADU or converted to an ADU, replacement of the lost parking is not required. |
Owner Occupancy | Required only for JADUs |
Sample fees from recent permits | See the ADU Guide on the City of Napa ADU webpage for sample fees: https://www.cityofnapa.org/876/Accessory-Dwelling-Units *Fees are specific to each project and will vary. Fees change regularly. These are provided as examples only. |
Other requirements | ADUs shall have a full kitchen. JADUs shall have at minimum an efficiency kitchen. |
Process | Detached ADUs exceeding 16 feet in height or on historic properties require Planning Division entitlements. All other ADUs apply directly with the Building Division. Disclaimer: standards and process may vary. Consultation with the contact is recommended before starting any project. |
Exceptions | |
Periodic updates, stories, and resources to support your ADU project.
Produced by Community Planning Collaborative
