A backyard cottage looks like the same asset no matter which side of a city line it sits on. In Santa Cruz, it isn't.
Buyers touring homes with an accessory dwelling unit usually run the same math: extra square footage, extra bedroom, extra income if the numbers work. That math holds up for long-term rental. It falls apart the moment short-term rental enters the conversation, because inside Santa Cruz city limits, adding an ADU or a junior ADU to a parcel does not expand your options. It closes one down. A few miles away, in unincorporated county territory, the rule is moving in the opposite direction. Same structure, same square footage, opposite outcome, depending on which jurisdiction the parcel happens to sit in.
What the city's rule actually says
As of this year, a Santa Cruz property with a single-family home plus an ADU or JADU cannot hold a short-term rental permit, full stop. That was still true when the city council met in February 2026 to update its ADU standards for state law compliance. The planning commission had floated a fix: let owner-occupied properties with an ADU rent short-term for up to seven consecutive nights and no more than 90 nights a year. The council didn't adopt it. Instead, Lookout Santa Cruz reported that staff was sent back to study the idea further, with no timeline for a decision.
The same meeting did modernize the construction side of the rule. ADUs and JADUs are now measured by interior livable space rather than exterior wall dimensions, and JADUs picked up the same fire sprinkler and fee exceptions that ADUs already had. The city made it easier to build the unit. It left in place the rule that the unit, once built, forecloses the short-term rental path for the whole parcel.
Why the council punted
The debate wasn't close to unanimous in spirit, even though the underlying ADU update passed. Councilmember Susie O'Hara worried the proposed limits still allowed too much turnover, noting the plan could mean "a lot of different people potentially coming in and out." Councilmember Renee Golder argued the opposite, saying the exclusion was "a missed opportunity from my perspective" on transient occupancy tax revenue during peak tourist months.
"I think we are missing out on potential [transient occupancy tax] income during high tourist seasons."
Councilmember Shebreh Kalantari-Johnson asked that the question return at the next annual ADU update, which means this isn't settled policy. It's a policy the council is actively arguing about, with no fixed date for resolution.
The same question, answered differently one border over
Unincorporated Santa Cruz County has been running its own version of this debate, and it landed somewhere different. A short-term rental subcommittee spent 2024 and early 2025 drafting a consolidated ordinance, and the county's own planning commission materials describe one piece of that draft as expanding eligibility for hosted rental permits to parcels with accessory dwelling units and junior accessory dwelling units, something the county's rules had also prohibited outright until then.
The county's hosted rentals page now cites an April 16 adoption date for the new countywide Short-Term Rental Ordinance, approved by the California Coastal Commission and in effect as of this writing. What isn't fully confirmed from the public materials is whether every detail of the 2025 ADU carve-out survived unchanged into final adoption. Ordinance language shifts between a subcommittee's proposal and a Coastal Commission signoff, and the version that ends up on the books is the only one that matters. If the county's ADU allowance is part of your plan, that's a call to county planning before it's a line item in your offer.
Here's the shape of the divide as it stands today:
| City of Santa Cruz | Unincorporated Santa Cruz County | |
|---|---|---|
| ADU/JADU on the parcel | Disqualifies the parcel from any short-term rental permit | Historically disqualifying, but the new ordinance moves toward allowing hosted permits under specific conditions |
| Condition for any carve-out | None adopted as of February 2026 | Proposed version requires the owner or immediate family to live in the ADU while the main home is rented |
| Permit transferability | Non-transferable, expires at sale | Non-transferable, expires at sale |
| Most recent regulatory action | ADU construction standards modernized; STR exclusion left in place | New Short-Term Rental Ordinance adopted by the Coastal Commission and now in effect |
What this means if you're the one evaluating the listing
An ADU still adds real value in Santa Cruz. It just doesn't add the value most buyers assume it does, and the difference matters enough to check before you write an offer around it.
- Confirm the jurisdiction first. City limits and unincorporated county lines cut through parts of the coastal side of town that look identical from the sidewalk. The parcel's jurisdiction determines which rulebook applies, not the neighborhood name on the listing.
- Don't price in a seller's current STR income. Permits are non-transferable in both the city and the county. A listing that shows strong nightly revenue under the current owner tells you nothing about what you'll be allowed to do after closing.
- Ask whether the ADU is actually permitted. An unpermitted structure carries its own file. Under the county's Senate Bill 13 legalization path, a Notice of Violation stays recorded on the property's title until the violation is resolved through legalization or demolition, which is a fact a title search will surface and a buyer should ask about directly.
- Check for Coastal Zone overlap. ADUs in the Coastal Zone can require additional review before a building permit is issued, separate from the standard ADU application most sellers describe.
- If the county carve-out matters to your plans, verify it fresh. The subcommittee's proposal and the ordinance the Coastal Commission ultimately approved may not be word for word identical. County planning can confirm what actually applies to a specific parcel today.
The rule serves two different goals at once
It's worth sitting with why the city moved on construction standards but not on rental use in the same meeting. Streamlining how an ADU gets built serves the housing supply goal the state has been pushing since 2016. Keeping ADU parcels out of the short-term rental pool serves a different goal, protecting long-term rental stock in a county where housing is tight in every direction. Those two goals don't conflict when the ADU is being built for a family member, a long-term tenant, or a home office. They collide the moment a buyer's spreadsheet assumes nightly rate income from day one.
A few questions worth asking before you assume
Does this apply to an ADU that's been there for decades, or only new construction? The exclusion attaches to the parcel, not the build date. A JADU converted from a garage years ago carries the same restriction as one framed this year.
What if I only want to rent the ADU long-term, not short-term? Long-term rentals, generally 31 days or more, sit outside the short-term rental definition entirely. That use isn't affected by this rule. Only the short-term permit path is closed.
Could the city eventually adopt the same carve-out the county is testing? Possibly. Kalantari-Johnson asked staff to bring the question back at the next annual ADU update. As of the February 2026 meeting, no change had been adopted.
If you're weighing a Santa Cruz property with an ADU already in place, or wondering whether to add one, the answer depends on a parcel line most listing photos never show you. I'd rather walk that line with you before you're under contract than after.
Reach out to Caroll Basile for a free home valuation, and let's look at what a specific parcel actually allows before you build a plan around what you assume it does.
