El Dorado County, CA Accessory Structures: ADU Rules (2026)
ADU rules in El Dorado County, CA, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.
Key Facts
- Detached ADU size
- 850-1,600 sq ft by lot size
- Attached ADU cap
- 50% of primary dwelling
- Side/rear setback
- No more than 4 feet
- Parking required
- Max 1 space/unit; many waivers
- Owner occupancy
- Required for permits after 1/1/2025
- JADU size cap
- 500 sq ft, inside existing home
- Units per lot
- 1 ADU plus 1 JADU allowed
Summary
El Dorado County allows one accessory dwelling unit and one junior ADU by right on any lot zoned for single-family or multi-family use under Code Section 130.40.300. Detached units are capped between 850 and 1,600 square feet by lot size, attached units cannot exceed 50 percent of the primary home, and permits issued after January 1, 2025 require owner occupancy.
A.This Section implements California Government Code Section 65852.2 et seq. regarding accessory dwelling units (ADUs) and California Government Code Section 65852.22 et seq regarding junior accessory dwelling units, to provide affordable housing alternatives, and to protect the public health, safety, and welfare of residents of El Dorado County. ... B.Applicability. In all zones that permit single-family or multi-family residential development, the expansion of the primary dwelling or the construction of a new structure for the purpose of creating an accessory dwelling unit or a junior accessory dwelling unit is allowed by right, subject to the provisions of this Section. The accessory dwelling unit may be rented separate from the primary residence for a term of not less than 30 consecutive calendar days, but may not be sold or otherwise conveyed separate from the primary residence except as provided for in Government Code Section 65852.26.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 13 Update 4).
Full Breakdown
300 implements state ADU law (Gov. 22) and makes ADU construction a ministerial, by-right approval in every zone that permits single-family or multi-family housing; no CUP or variance is needed. ft. on lots an acre or larger; attached units cap at 50 percent of the primary dwelling's square footage. Side and rear setbacks cannot exceed four feet unless fire, utility, or drainage easements require more, and converting an existing legal structure (garage, barn, pool house) needs no setback at all. Parking is limited to one space per ADU and is waived entirely within a half-mile of public transit, in a Design Review-Historic zone, when converting an existing legal parking structure, or when on-street permits aren't offered to the ADU occupant.
A junior ADU (JADU) tops out at 500 square feet built entirely inside the existing home, needs no extra parking, and must carry a recorded deed restriction barring separate sale and requiring an efficiency kitchen. Owner occupancy of one unit on the lot was suspended by state law for permits issued between January 1, 2020 and January 1, 2025; permits issued after that date require the owner to live in one of the dwellings, recorded via a notarized notice of restriction filed before the certificate of occupancy issues, except for nonprofit housing organizations, special-needs trusts, and licensed Community Care Facilities. Under the county's separate short-term rental chapter, ADUs and JADUs cannot be used as hosted or vacation home rentals.
Violations & Fines
Building beyond the by-right floor-area or setback standards without approval is a Title 130 zoning violation handled by Code Enforcement. For JADUs, the recorded deed restriction is directly enforceable: noncompliance with the no-separate-sale, owner-occupancy, or efficiency-kitchen conditions can trigger legal action against the property owner, including revocation of the right to maintain the JADU on the property.
Frequently Asked Questions
Do I need a conditional use permit to build an ADU in El Dorado County?
Can I rent my El Dorado County ADU out short-term?
Do I have to live on the property if I build an ADU?
How much parking does an ADU need in El Dorado County?
Sources & Official References
Other rules in El Dorado County
How El Dorado County compares: Easiest Cities to Build an ADU·California rules heatmap·Compare El Dorado County to another location·View the California accessory structures overview
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