ADU Questions · 2026
Can I Sell My ADU as a Condo?
Yes, you can sell an ADU as a condo separately from your main home, but only if your city has specifically opted in to allow it. The state law that makes this possible exists statewide, but each city has to pass its own local ordinance before you can actually use it on your property.
The short version: Selling an ADU as a separate condo is legal statewide, but it only works in the specific cities that have adopted a local ordinance allowing it. Call your city’s planning department before you assume it applies to you.
What actually has to happen for this to work
California passed a law, AB 1033, that gives cities the option to let homeowners map an ADU as a condominium and sell it as its own unit, separate from the main house. That’s an important distinction: it’s not automatic statewide like the basic ADU size and setback rules are.
For your ADU to be sellable as a condo, three things need to line up:
- Your city has adopted an implementing ordinance. Some cities have done this. Many have not, or are still working through it. This is a local decision, city by city (or county by county for unincorporated areas), and it’s changing over time as more jurisdictions catch up.
- Your property qualifies under that ordinance’s local rules. Cities that opt in can still set their own specific standards for how the condo mapping process works.
- You go through the condominium mapping process, which is a real subdivision-style process, not just a form you fill out. It typically involves surveying, recording a condo plan, and working with your city’s planning and building departments.
If your city hasn’t opted in yet, you can still build and own the ADU, rent it out, or use it for family, but you cannot legally sell it as a stand-alone condo unit at this time. That could change if your city adopts an ordinance later.
How to find out if your city allows it
The fastest, most reliable path is a direct call or email to your city’s planning department, asking specifically whether they have adopted an ordinance implementing AB 1033 for ADU condominium conversions. This is a specific enough question that most planning staff will know the answer immediately or be able to point you to the right person.
A local real estate attorney or a title company that handles subdivisions in your area can also confirm current status, since they deal with this process directly when it applies.
Because this is a fast-moving, city-by-city area of law, don’t rely on a blog post, a real estate agent’s general impression, or something you read a year ago. Confirm current status directly with your city before you plan around it.
Why this matters for how you plan your ADU
If selling the ADU separately down the road is part of your long-term plan, whether for your own exit strategy or to eventually pass a unit to a family member as its own property, it’s worth checking your city’s status before you build, not after. It won’t change how the ADU itself is built, but it affects what your options look like later.
Either way, the ADU still needs to meet standard California ADU requirements: it can be up to 1,200 square feet under state law depending on your city’s local maximum, needs at least 4 feet of side and rear setback for new construction, and goes through the same ministerial permit process regardless of whether it will ever be condo-mapped. A Framework First feasibility study confirms what’s buildable on your specific lot, and our team can help you think through how your city’s rules affect your options, including this one, before you commit to a model. You can also browse our full lineup of 14 models to get a sense of what fits your property.
For the deeper legal and legislative background on AB 1033 itself, including how the law came about and what it changed, see our companion article on selling an ADU separately in California.
Frequently asked questions
Do all California cities allow selling an ADU as a condo?
No. AB 1033 gives cities the option to allow it, but each city has to adopt its own local ordinance first. It is not automatic statewide. Some cities have opted in, many have not yet, and the list is changing over time. Always confirm directly with your specific city’s planning department.
What’s the difference between renting out my ADU and selling it as a condo?
Renting an ADU is allowed statewide with no special ordinance needed, subject to your city’s rental rules (some jurisdictions require minimum rental lengths, for example). Selling an ADU as a separate condo unit is a different, more involved legal process that requires your city to have opted in under AB 1033 and requires an actual condominium mapping process, closer to a mini subdivision than a simple sale.
If my city hasn’t opted in yet, can I wait and sell it later once they do?
Potentially, yes. If your city adopts an implementing ordinance after you’ve already built your ADU, you may be able to go through the condo mapping process at that point, assuming your property and ADU meet whatever standards the ordinance sets. There’s no way to guarantee your city will opt in, so this should be treated as a possibility, not a plan to count on.
Does condo-mapping an ADU change how it needs to be built?
No. The ADU still has to meet the same California ADU standards regardless of whether it will ever be sold separately: size limits, setbacks, height, and the standard ministerial permit process all apply the same way. Condo mapping is a separate legal and title process that happens on top of a normally built, code-compliant ADU, not a different construction standard.
Curious whether your property and your city’s rules line up for the ADU you want? Start a feasibility study and get real answers for your address.