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Data Centers & Crypto Mining

Data Centers & Crypto Mining in Costa Mesa, CA: What Residents Actually Need to Know

By CityRuleLookup Editorial Team

If you live in Costa Mesa or are thinking about moving there, data centers & crypto mining are one of those things you probably won't think about until they affect you directly. Costa Mesa has 2 specific rules on the books covering different aspects of data centers & crypto mining, and some of them might surprise you.

Data Center Noise Limits

Costa Mesa caps exterior noise at 55 dB(A) from 7 a.m. to 11 p.m. and 50 dB(A) overnight, measured on the affected residential property. Municipal Code Section 13-280 sets the standard, and data-center chillers and generators are fixed noise sources bound by it.

Key details: Code: Muni Code Sec. 13-280. Daytime limit: 55 dB(A), 7 a.m.-11 p.m.. Night limit: 50 dB(A), 11 p.m.-7 a.m.. Tonal noise: Limits reduced five dB(A). Measured at: Affected residential property.

Noise exceeding the Section 13-280 standards is a Municipal Code violation enforced by Costa Mesa code enforcement through citations and administrative fines, and can breach noise conditions on a conditional use permit.

Data Center Zoning & Siting

Costa Mesa has no data-center use in its Land Use Matrix. Server facilities locate in the MG and MP industrial zones, permitted by right when the development services director finds similarity to a listed industrial use, and otherwise by conditional use permit.

Key details: Dedicated ordinance: None. Industrial zones: MG and MP. Unlisted use: Director similarity finding. Fallback permit: Conditional use permit. Discretionary review: CEQA plus public hearing.

Establishing a data center outside the MG or MP zones, or without a required conditional use permit, is a Municipal Code violation enforced by Costa Mesa code enforcement through citations, administrative fines, and abatement.

This is one of the stricter rules in Costa Mesa's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.

The Bottom Line

Costa Mesa's data centers & crypto mining rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Costa Mesa is broadly strict or permissive.

All of the above reflects Costa Mesa's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.