ADU Laws · 2026
ADU Owner-Occupancy Rules in California (2026)
You do not have to live on the property to build or rent out an ADU in California. State law currently suspends the owner-occupancy requirement for standard ADUs, so you can own the home, rent out both the main house and the ADU, and never set foot on the lot if you choose. The one big exception is a Junior ADU (JADU), which still requires the owner to live on site.
That single rule change is one of the reasons backyard ADUs have become such a strong investment for homeowners across Monterey, Santa Cruz, and Santa Clara counties. You keep full flexibility over how you use the unit.
The short version: Owner-occupancy is not required for a standard ADU in California. State law permanently removed the owner-occupancy requirement for standard ADUs, so you can rent out the ADU, the main house, or both. The only unit that still requires you to live on the property is a JADU (a junior ADU up to 500 sq ft built inside the existing home).
What “owner-occupancy” actually means
Owner-occupancy is a rule that says the property owner must live in one of the units on the lot, usually the primary residence, in order to legally keep the second unit. For decades, many California cities used owner-occupancy requirements to limit who could build an ADU and to discourage investors.
That changed with a series of state laws. To make it easier to add housing, California suspended the owner-occupancy requirement for standard ADUs. The state did this deliberately so that homeowners could build a backyard unit purely for rental income, for family, or for resale value without being forced to live there.
So in practice, for a standard detached or attached ADU:
- You can rent out the ADU to a tenant while you live in the main house.
- You can rent out both the main house and the ADU and live somewhere else entirely.
- You can move into the ADU and rent the big house.
- You can sell the property later, and the new owner inherits the same flexibility.
There is no requirement that you, or anyone in particular, occupy either unit.
The big exception: JADUs still require owner-occupancy
A Junior ADU (JADU) is the one type of unit where owner-occupancy is still mandatory. A JADU is a small unit, up to 500 square feet, carved out of the walls of an existing single-family home. Because it shares so much with the main house (it can even share a bathroom), the state kept the owner-occupancy rule in place for JADUs.
If you build a JADU, the owner must live in either the JADU or the main house. You cannot rent out both and move away. For a deeper comparison of the two unit types, see our guide on JADU vs. ADU.
| Standard ADU | JADU (Junior ADU) | |
|---|---|---|
| Max size | Up to 1,200 sq ft | Up to 500 sq ft |
| Owner must live on site? | No | Yes |
| Can you rent it out? | Yes | Yes (owner lives in the other unit) |
| Can you rent out the whole property? | Yes | No |
| Where it’s built | Detached in yard, or attached | Inside the existing home’s walls |
| Best for | Rental income, family, resale value | Lowest-cost family unit or light rental |
Why this matters for your investment
Because owner-occupancy is suspended for standard ADUs, a Framework First detached ADU works as a true income property. You can:
- House family now and rent later. Move a parent into the ADU today, then turn it into a rental once your situation changes. See our guide on ADUs for aging parents.
- Run it as a pure rental from day one. Many of our clients build specifically for monthly rental income. We break down realistic numbers in how much rent an ADU can earn.
- Sell with full flexibility. A property with a legal, no-strings ADU is attractive to buyers and appraisers because the next owner has the same freedom you did.
Our 14 models range from 405 to 1,200 square feet, and pricing runs from $180,000 to $557,000. That number includes a permitting budget along with plans, foundation, the factory build, delivery, hookups, appliances, and final inspection, with exact permit costs confirmed for your property in a feasibility study. You can browse the full lineup on our models page or estimate your project with the ADU calculator.
What still applies even without owner-occupancy
Owner-occupancy being suspended does not mean an ADU has no rules. A few things still hold true under 2026 California law:
- One ADU plus one JADU per single-family lot. A typical single-family property may add one ADU and one JADU. If you build a JADU, remember the owner-occupancy rule attaches to it.
- Ministerial approval. ADU applications are approved or denied without a public hearing, and the city must act on a complete application within 60 days.
- Standard ADUs can reach 1,200 sq ft. Cities must allow at least an 800 sq ft, 16 ft tall ADU regardless of local rules, with maximum 4 ft side and rear setbacks.
- Local fees and details vary. School fees, utility connection costs, and specific local standards vary by city. We confirm every one of these for your exact address in the feasibility study.
For a fuller picture of what landlords can and cannot do, read our California ADU rental laws guide.
Frequently asked questions
Do I have to live on the property to build an ADU in California?
No. Current California state law suspends the owner-occupancy requirement for standard ADUs. You can build one as an investment and rent it out without living on the property. The only unit that requires owner-occupancy is a JADU.
Can I rent out both my main house and my ADU?
Yes, for a standard ADU. Because owner-occupancy is suspended, you can rent the main home and the ADU at the same time and live somewhere else. This is one of the most common reasons our clients in Salinas and San Jose build with us.
Does a JADU require me to live there?
Yes. A JADU (up to 500 sq ft, built inside the existing home) keeps the owner-occupancy requirement. The owner must live in either the JADU or the main house, so you cannot rent out the entire property if you build a JADU.
Will the owner-occupancy rules change again?
ADU law in California has evolved as the state pushes to add housing, and the owner-occupancy exemption for standard ADUs is now permanent. We track the current rules closely and confirm exactly what applies to your property and address as part of the feasibility study, so you are never relying on outdated information.
Can I build an ADU on a property I don’t live in at all?
Yes, for a standard ADU. As long as the unit meets size, setback, and local standards, you can build on a property you own but do not occupy. Whether your specific lot qualifies is confirmed in the feasibility study, and you can learn more in can I build an ADU on my property.
The simplest way to know exactly how the owner-occupancy rules and every other ADU regulation apply to your address is to let our team check it for you. We are a family-owned builder (CSLB #1047146, MFG #1595931) that has been building done-for-you ADUs since 2021. Start with a feasibility study and we’ll confirm what you can build, what it costs, and exactly how you’re allowed to use it.