ADUs built in line with Cupertino ADU requirements go by many names, including accessory dwelling units, granny apartments, in-law units, second units, and casitas.
Are you looking towards building an ADU in Cupertino? If you’re considering boosting your property value, bringing in extra income, or housing for family and friends, read through the post to start understanding Cupertino ADU Requirements. Then, to obtain specific information about your property, visit Fields Remodeling, your guide to constructing an Accessory Dwelling Unit on your property.
The Cupertino ADU requirements are as follows:-
Two units are allowed if one is a JADU and the other is a detached 800 sf. ADU
Multi-Family Units: The greatest of 25% of existing housing units or one ADU, up to two separate ADUs.
Here are the types of accessory dwelling units you are allowed to build within your property in Cupertino
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Detached ADU |
This is a standalone unit you can have detached from the main home. However, the construction will be within your property boundary walls |
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Attached ADU |
This ADU shares a wall with the main building but has a separate entrance. There will be no access to the ADU from inside the main home. |
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JADU |
The JADU is a smaller unit but should be comfortable for a single person to reside in. It could have around 500 square feet of interior space. |
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Conversion |
You can plan conversion projects and the garage conversion into an ADU is popular. With the advent of carports, you can plan to convert the garage into a luxury living spot. You can also plan interior home conversion projects The store room can be converted into an ADU. |
Single-family and multi-family residential properties will not be subject to the minimum lot size of the underlying zoning district or by ordinance for accessory dwelling unit projects. ~AB-68
Single Family: 1 Bed: 850 sf
2+ beds: 1,000 sf
Must meet floor area ratio and lot coverage
Detached Multi-family: 1,200 square feet
Front: Per underlying zoning
Back and sides: 4 feet
Replacement parking will not apply to lots that convert an existing garage to an Accessory Dwelling Unit or Junior Accessory Dwelling Unit (JADU). ~ AB68 and AB881 update
State minimum requirements.
The architecture, colors, materials, etc., must be consistent with the main house.
Conversion: By underlying zone, no increase
Detached: 16 feet
The ministerial review process shall be as per state standards.
Not specified by state standards.
Owner occupancy is optional for new ADUs (conversion and new construction) between 2020 and 2025. ~ SB13 Update.
Approval from the local health officer where a private sewage disposal system is used if required. (State requirements)
It must have direct access to the outside without going through the primary residence, and the entrance must be screened from a public street.
*** As of 2020, in accordance with state law, all residential zoning districts, including single-family and multi-family dwellings, may build accessory dwelling units. ***
California Building Code (CBC) 2019 is adopted.
Fields Remodeling helps you build your Accessory Dwelling Unit per Cupertino ADU requirements to fit your specific preferences and needs.
Most of the time, Accessory Dwelling Units are permitted in any area that allows non-commercial use. Additional parking is not an obligation providing the ADU is built within a half-mile of public transportation. Fire sprinklers are only needed if they are necessary for the primary housing unit. Nevertheless, any freshly constructed, separate ADU will require solar power systems.
The Cupertino Planning Department is an excellent resource for information regarding zoning code and development standards, including recent changes to Cupertino ADU requirements.
You are spared from having to allocate parking space if your home lies within half a mile of the public transit stop.
You can build such a structure in front of the main home. However, it will be considered the primary home and not a granny flat.
The ADU can have it only if they are present in the main home.
Yes, the regulations permit you to build an ADU within your duplex.
