ADU Rental Restrictions: Carlsbad vs San Diego
How do adu rental restrictions rules compare between Carlsbad, CA and San Diego, CA?
Carlsbad and San Diego have similar restriction levels.
Carlsbad, CA
San Diego County
Carlsbad prohibits short-term rentals (under 30 days) of any ADU permitted on or after January 1, 2020. The prohibition is recorded as a deed restriction under CMC 21.10.030 and reinforced by Carlsbad's Short-Term Vacation Rental ordinance (CMC 5.60), which limits STR permits to specific coastal zone areas only.
View full Carlsbad rules →San Diego, CA
San Diego County
San Diego ADUs may be rented long-term (30+ days) without restriction. Short-term rentals are governed by SDMC § 510.0101 et seq. (the four-tier STRO program). ADUs cannot operate as Tier 3 or Tier 4 STRs in most cases because those tiers require the host's primary residence. Junior ADUs are restricted to 30-day minimum rentals by SDMC § 141.0302(c)(2).
View full San Diego rules →Key Facts Comparison
| Fact | Carlsbad | San Diego |
|---|---|---|
| Code Section | CMC 21.10.030; CMC 5.60 | - |
| Min Rental Term | 30 days | - |
| Deed Restriction | Required (recorded with SD County) | - |
| STR Permit for ADU | Not available (categorical exclusion) | - |
| Daily Fine | Up to $1,000/day (CMC 5.60.090) | - |
| Long-Term (30+ days) | - | Permitted, no separate license |
| STR Tiers | - | 1-4 under SDMC § 510 |
| ADU as Tier 3/4 | - | Generally not eligible |
| JADU STR | - | Banned (30-day minimum) |
| STRO Code | - | SDMC § 510.0101 et seq. |
Highlighted rows indicate differences between cities.
Carlsbad FAQ
Can I list my Carlsbad ADU on Airbnb?
No. Any ADU permitted on or after January 1, 2020 carries a recorded deed restriction prohibiting rentals shorter than 30 days. Carlsbad's STR ordinance (CMC 5.60) also categorically excludes ADUs from the short-term rental permit program.
What's the minimum lease term for a Carlsbad ADU?
30 days. Government Code 65852.2(a)(6) and CMC 21.10.030 require a 30-day or longer rental term for any ADU permitted in Carlsbad on or after January 1, 2020. Long-term tenants, monthly rentals, and family living arrangements are all permitted.
What happens if I rent my ADU on Vrbo anyway?
Carlsbad enforces CMC 5.60 with administrative citations of up to $1,000 per day, deed-restriction enforcement, and revocation of the Certificate of Occupancy. The city also reports unpermitted listings to Airbnb and Vrbo for removal.
San Diego FAQ
Can I rent my ADU on Airbnb in San Diego?
Generally no for Tiers 3 and 4 because those require the host's primary residence. An ADU can serve as a Tier 1 STR (≤20 nights/year). Long-term rental (30+ days) is always allowed without an STR license.
Can I short-term rent a junior ADU in San Diego?
No. SDMC § 141.0302(c)(2) requires JADU rentals to be 30 days or longer. JADUs cannot be short-term rented under any STRO tier.
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