Can You Really Sell Your ADU? Santa Cruz Joins Cities Allowing ADUs as Condos

- Dax Nollenberger

Can You Really Sell Your ADU? Santa Cruz Joins Cities Allowing ADUs as Condos

August 27, 2025

Accessory Dwelling Units (ADUs) have become a defining feature of California’s housing market, offering flexible space for family, rental income, or long-term investment. With the passage of Assembly Bill 1033 (AB 1033), homeowners across the state gained something entirely new: the ability, where cities allow it, to legally sell an ADU as a condominium separate from the main home.

This year, the City of Santa Cruz officially opted in. As of February 2025, local homeowners now have a path to convert ADUs into condos and sell them individually. That makes Santa Cruz one of the first coastal communities in California to embrace this shift, and it could reshape how residents think about property ownership, generational wealth, and affordability.

What the Law Actually Does

AB 1033 does not split your lot like a traditional subdivision or an SB 9 lot split. Instead, it creates a condominium map, where both the primary residence and the ADU become legally recognized condo units.

• Shared land: The lot remains a single parcel, with common ownership of the underlying land.
• Separate titles: The main home and the ADU each get their own deed, allowing separate mortgages and sales.
• HOA structure: Owners form a small homeowners association to manage shared elements like driveways, utilities, or landscaping.

Think of it as turning one property into a two-unit condo development, even though it still looks like a single-family lot from the street.

How Condo-izong Works in Practice

Turning an ADU into a condo is not as simple as putting up a For Sale sign. Here is what the process looks like in Santa Cruz:

1. Hire professionals: A surveyor or engineer prepares the condo map, an attorney drafts the CC&Rs and HOA documents, and a title company helps with recordation.
2. Apply through the city: You submit a parcel map (if it is just the house and one ADU) through Planning and Public Works for approval.
3. Lienholder consent: If you have a mortgage, the lender must sign off before the subdivision can be recorded.
4. Safety and compliance: The ADU must pass inspection and utilities must be notified of the change.
5. Record the documents: The condo map and CC&Rs are recorded, and the county issues separate APNs for each unit.
6. Sell the unit: At this stage, the ADU can be financed and sold like any other condo.

The process is similar to developing a two-unit condo project, just on a smaller scale.

Why It Could Make Sense for Santa Cruz Homeowners

Unlock Equity Without Selling Everything

Condo-mapping the ADU lets you sell one piece of the property while keeping the other, unlocking equity for retirement, education, or reinvestment.

Easier Financing Options

Once condoized, an ADU becomes eligible for conventional mortgage financing, making it easier for buyers to purchase and for sellers to capture full market value.

Create a More Affordable Entry Point

ADU condos could serve as starter homes, priced below single-family houses, creating options for teachers, service workers, and young families who want to stay local.

Keep Housing in the Community

Because they are smaller and more affordable, ADU condos are more likely to be bought by local residents rather than investors, which helps maintain neighborhood stability.

Multi-Generational Possibilities

Families can sell or transfer the ADU to relatives, giving adult children or aging parents the ability to own property outright while staying nearby.

The Catch

As promising as this law sounds, AB 1033 is still very new. Santa Cruz is one of only a handful of cities to adopt it so far. Condoizing an ADU requires time, money, and legal work, which may limit how many homeowners actually take advantage. Like other housing bills before it, this may prove to be good in theory but slower to catch on in practice.

Also of note, only the city of Santa Cruz has adopted this so if you’re in the county but outside the city limits, it’s not an option for you. 

The Bottom Line

With AB 1033 and Santa Cruz’s early adoption, selling an ADU as a condo has gone from a “what if” to a real option. For the right homeowner, it could be a way to unlock equity, create a more affordable entry point into the market, or keep family close while maintaining ownership. But the path requires careful planning, professional help, and an understanding that selling an ADU means releasing the control of use that ownership provides.

If you are curious whether condo-mapping your ADU might work for you, let’s talk. I can walk you through the process, help connect you with the right professionals, and explore how this fits into your larger real estate goals.

📩 dax@sereno.com
📞 831-227-5847