Investors and ADU Owner Occupancy Requirements

California has officially removed most owner occupancy requirements for both ADUs and JADUs. This update reflects the recodified ADU statutes under Government Code Chapter 13. Accessory Dwelling Units (§§ 66310–66342), effective January 1, 2025, and the amendments to JADU law under SB 543, effective January 1, 2026.

Below is what the law now says and what it means in practice. And as always, consult legal counsel for property specific advice.

Owner Occupancy Requirements for ADUs in California

There is no owner occupancy requirement for ADUs in California. Government Code §66323 establishes the maximum standards that local agencies may apply to ADUs and does not permit an owner occupancy requirement. Local agencies may require rentals to be 30 days or longer, but they may not require the owner to live on site, which is explicitly prohibited in §66315.

This means you can:

• Build an ADU on a rental property
• Rent out the primary home
• Rent out the ADU
• Not live on the property at all

This rule is now permanent statewide.

Updated Owner Occupancy Rules for JADUs (Effective January 1, 2026)

Junior Accessory Dwelling Units (JADUs) are governed by Government Code §§66333–66339.5. Under Government Code §66333(b), as amended by SB 543 (effective January 1, 2026), owner occupancy is required only in a limited circumstance:

• If the JADU shares sanitation facilities with the existing structure, a local agency may require owner occupancy in the single-family residence. So if the JADU shares a bathroom with the main residence, the owner must reside in either the primary residence or the JADU.

Owner occupancy is not required:

• If the JADU has separate sanitation facilities. So if the JADU includes its own bathroom, no owner occupancy requirement applies.
• If the owner is a governmental agency, land trust, or housing organization
• This is a significant change from prior law, when owner occupancy was generally required for JADUs regardless of bathroom configuration.

What This Means for Investors

An investor can own a single family property with:

• A primary dwelling
• A new detached or attached ADU (typically up to 1,200 SF, but at least 850 SF for a 1BR and 1,000 SF for a 2BR if local law sets most restrictive limits)
• A JADU with its own bathroom (up to 500 SF, within the existing residence… could be within a garage)
• A conversion ADU – either attached or detached from the main home

…and rent all units without living on site.

Read more about ADUs as investment properties.

Other JADU Rules Still Apply

Even though owner occupancy requirements have narrowed, other statutory rules remain under Government Code §66333:

• Only one JADU per single-family lot (§66333(a))

• Must be constructed within the walls of the existing or proposed single-family residence (§66333(d))

• Cannot be sold separately from the primary residence (§66333(c)(1))

• Must include an efficiency kitchen (§66333(f))

• No additional parking may be required (§66334(a))

• Rental term must exceed 30 days (§66333(g))

JADUs remain a cost-effective housing option, but they operate under a distinct statutory framework from detached ADUs.

Related read: Drawbacks of ADUs? Here’s What People Get Wrong

Below are the most common questions we receive about ADU and JADU owner occupancy requirements in California.

Frequently Asked Questions About ADU and JADU Owner Occupancy (California 2026)

Do you have to live on your property to build an ADU in California?

No. Under Government Code §66323, local agencies may not impose an owner occupancy requirement for ADUs. You can build an ADU on a rental property and rent out all units, subject to local rules requiring rentals longer than 30 days.

Do you have to live on your property to build a JADU in California?

Usually no. Under Government Code §66333(b), owner occupancy is only required if the JADU shares sanitation facilities, such as a bathroom, with the main residence. If the JADU has its own separate bathroom, owner occupancy is not required. This rule is effective January 1, 2026 under AB 1154.

Can an investor own a property with an ADU and JADU and rent all units?

Yes, in most cases. There is no owner occupancy requirement for ADUs under §66323. For JADUs, owner occupancy is only triggered under §66333(b) if the unit shares sanitation facilities with the primary residence. If the JADU has a separate bathroom, all units may be rented.

Can an LLC own a property with an ADU or JADU in California?

Yes. An LLC or other legal entity may own property with an ADU or JADU. However, if a JADU shares sanitation facilities and triggers owner occupancy under §66333(b), a natural person must reside on site. A legal entity cannot physically occupy property. If the JADU has its own bathroom, owner occupancy does not apply.

Can cities require owner occupancy for ADUs?

No. Government Code §66323 establishes the maximum standards local agencies may impose. Owner occupancy is not among them. Cities may require rentals to be 30 days or longer but may not require the owner to live on site. Read more about rental ADUs.

Can a JADU be sold separately from the main house?

No. Under Government Code §66333(c)(1), a JADU cannot be sold separately from the primary residence. A deed restriction must be recorded prohibiting separate sale. Read more about the sale of ADUs.

How many JADUs are allowed per lot?

Only one. Government Code §66333(a) limits JADUs to one per single-family residential lot with a single-family residence built or proposed.