Coto de Caza · Orange County · California

Septic in Coto de Caza, CA

Coto de Caza is in Orange County, and that page sets out the county's septic rules for any address that isn't on public sewer. California lets a city, a county or a special district act as the local agency for septic systems, so if you're unsure who issues your permit, ask the city first and the county second.

Residents: 15,363
Homes built before 1980: 4.7%
Median home value: $1,419,400

The resident, housing-age and home-value figures come from the Census Bureau's ACS 2023 five-year estimates (B01003, B25034, B25077).

Written by SepticMatch's editorial teamLast reviewed Oct 23, 2026

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Orange County sets the septic rules

The city doesn't issue septic permits or set the sale-inspection and installer rules, because the county health department handles all three. Orange County's septic management program was still under state review as of February 2026..

Who permits septic systems: Orange County Health Care Agency, Environmental Health, 1241 E. Dyer Road, Suite 120, Santa Ana; (714) 433-6000. Its Land and Water page lists well permitting, cross-connection, liquid waste haulers and solid waste; no septic permit page was found, and the office that issues septic permits in unincorporated Orange County is not stated.
Inspection at sale: No rule found in the county's published code

See the Orange County septic rules

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