Garage Conversions: Arcata vs Eureka
How do garage conversions rules compare between Arcata, CA and Eureka, CA?
Arcata and Eureka have similar restriction levels.
Arcata, CA
Humboldt County
Humboldt County allows conversion of an existing garage or accessory structure into an ADU or JADU with zero required setback, ministerial approval, no separate utility connection fees, and no impact fees if under 750 sq ft; short-term rentals (30 days or less) remain prohibited.
View full Arcata rules →Eureka, CA
Humboldt County
Humboldt County allows conversion of an existing garage or accessory structure into an ADU or JADU with zero required setback, ministerial approval, no separate utility connection fees, and no impact fees if under 750 sq ft; short-term rentals (30 days or less) remain prohibited.
View full Eureka rules →Key Facts Comparison
| Fact | Arcata | Eureka |
|---|---|---|
| Code Section | Humboldt County Code sections 314-69.05.3.8.1, 69.05.4.1.3, 69.05.4.5 | Humboldt County Code sections 314-69.05.3.8.1, 69.05.4.1.3, 69.05.4.5 |
| Setback for existing-structure conversion | Zero (none required) | Zero (none required) |
| Expansion allowance | Up to 150 sq ft beyond existing dimensions, for ingress/egress only | Up to 150 sq ft beyond existing dimensions, for ingress/egress only |
| Separate utility connection | Not required for conversions within existing structures (no connection/capacity fee) | Not required for conversions within existing structures (no connection/capacity fee) |
| Impact fees | None for ADUs under 750 sq ft (69.05.4.1.2) | None for ADUs under 750 sq ft (69.05.4.1.2) |
| Approval type | Ministerial (no hearing or discretionary review) | Ministerial (no hearing or discretionary review) |
| Short-term rental rule | Cannot be rented for terms of 30 days or less | Cannot be rented for terms of 30 days or less |
Highlighted rows indicate differences between cities.
Arcata FAQ
Can I convert my garage to an ADU in unincorporated Humboldt County?
Yes, ministerially, under section 314-69.05.3.8.1. The conversion needs a separate exterior entrance, must comply with state building standards, and has no setback requirement under section 69.05.4.5 because it stays within the existing footprint.
Do I have to add a new utility connection when I convert the garage?
No. Section 69.05.4.1.3 says no new or separate utility connection is required and no connection fee or capacity charge applies, unless the ADU is built concurrently with a new single-family dwelling.
Will I have to pay impact fees on the converted unit?
Not if the converted ADU is less than 750 sq ft. Section 69.05.4.1.2 prohibits impact fees on ADUs under 750 sq ft and requires ADUs at or above 750 sq ft to be charged proportionate to the primary dwelling's square footage.
Can I short-term rent the converted garage on Airbnb?
No. Section 69.05.3.4 explicitly states 'The ADU shall not be rented for periods of 30 days or less,' which applies to garage conversions the same as new-construction ADUs.
Eureka FAQ
Can I convert my garage to an ADU in unincorporated Humboldt County?
Yes, ministerially, under section 314-69.05.3.8.1. The conversion needs a separate exterior entrance, must comply with state building standards, and has no setback requirement under section 69.05.4.5 because it stays within the existing footprint.
Do I have to add a new utility connection when I convert the garage?
No. Section 69.05.4.1.3 says no new or separate utility connection is required and no connection fee or capacity charge applies, unless the ADU is built concurrently with a new single-family dwelling.
Will I have to pay impact fees on the converted unit?
Not if the converted ADU is less than 750 sq ft. Section 69.05.4.1.2 prohibits impact fees on ADUs under 750 sq ft and requires ADUs at or above 750 sq ft to be charged proportionate to the primary dwelling's square footage.
Can I short-term rent the converted garage on Airbnb?
No. Section 69.05.3.4 explicitly states 'The ADU shall not be rented for periods of 30 days or less,' which applies to garage conversions the same as new-construction ADUs.
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