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Marin County, CA Data Centers & Crypto Mining: Data Center Zoning & Siting (2026)

Significant Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified July 2026

Key Facts

Dedicated Ordinance
None
Only Industrial Zone
IP (Industrial, Planned)
Approval Path
Use determination + Use Permit
Environmental
CEQA; Coastal Permit on coast
Jurisdiction
Unincorporated county only

Summary

Marin County has no data center ordinance, and its unincorporated land is overwhelmingly residential, agricultural, and open space with very little industrial zoning. A data center is not a listed use, so building one would need a Director's use-equivalence finding, a Use Permit, and CEQA review.

These county ordinances apply to unincorporated areas of Marin County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

The IP zoning district is intended for areas of the County appropriate for business park, light industrial and manufacturing uses in campus-like settings.

Source: Marin County Development Code (Title 22) & Marin Countywide Plan Noise ElementView official code

Full Breakdown

Unincorporated Marin is governed by Title 22, the Development Code. Only one district, IP (Industrial, Planned), is set aside for light industrial and manufacturing, and the county has very little IP-zoned land. A data center appears nowhere in the Title 22 land use tables, so it would first need a Community Development Agency Director determination under Section 22.02.020.E that it is equivalent to a listed use such as research and development or warehousing, then a Conditional Use Permit under Chapter 22.48 plus CEQA review. Coastal Zone parcels also need a Coastal Development Permit under Title 20, the Local Coastal Program. These rules cover unincorporated land only; incorporated cities apply their own zoning.

Violations & Fines

Building a data center on unincorporated Marin land without a Director use determination, a Use Permit, CEQA clearance, or a required Coastal Development Permit halts approval and draws Community Development Agency enforcement until the project is properly permitted.

Frequently Asked Questions

Can you build a data center in unincorporated Marin County?
Yes, but uncommon. Industrial land is scarce, and a data center is not a listed use, so it needs a Director equivalence finding under Section 22.02.020.E, a Use Permit, CEQA review, and a coastal permit on the coast.
Does Marin County have data center rules, and how can I weigh in?
No dedicated data-center ordinance exists; projects are handled case by case under Title 22. To advocate for rules, contact the Marin County Board of Supervisors at marincounty.gov/departments/board or email BOS@marincounty.gov.
Does Marin County have a crypto mining ordinance?
No. There is no rule specific to cryptocurrency mining. A commercial mining operation is treated as a data center or industrial use, needing the same Use Permit, CEQA review, and Countywide Plan noise compliance.

Sources & Official References

Other rules in Marin County

Data Center Noise LimitsSome RestrictionsParking Rules: EV ChargingSome RestrictionsParking Rules: Loading ZonesSome RestrictionsParking Rules: Preferential Parking DistrictsSome RestrictionsAnimal Ordinances: Bird ProtectionSome RestrictionsLandscaping Rules: Native PlantsLight RestrictionsLandscaping Rules: Rainwater HarvestingFew Restrictions

All Marin County rules

California rules heatmap·Compare Marin County to another location·View the California data centers & crypto mining overview

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