El Monte's code allows one junior ADU with one ADU on a single-family lot and requires no junior-ADU parking. Its code asks every junior-ADU owner to live on site, while state law requires that only when sanitation is shared; the City's 2026 addressing policy follows the state rule.
Last verified 2026-10-18. Rules change; the City of El Monte Building & Safety Division has the final word ((626) 580-2050).
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El Monte Municipal Code 17.110.030(R) still requires owner occupancy for every junior ADU. The separate-sanitation exception in Government Code 66333(b) is not reflected in that code wording.
El Monte Municipal Code 17.110.030(R)El Monte's April 2026 ADU/JADU Addressing Policy calls for owner occupancy where a junior ADU shares sanitation, matching Government Code 66333(b). Confirm how Building & Safety applies the policy to a junior ADU with a separate bathroom.
City of El Monte ADU/JADU Addressing Policy (Apr. 23, 2026)| Type | Est. all-in cost | Est. rent |
|---|---|---|
| Junior ADU (inside the house) | $60,000-$110,000 | $1,225-$1,575/mo |
Estimates for a first conversation, not bids or appraisals. Source: LotUpside price book em-2026-10. Provisional estimate: build costs are Los Angeles builder price lists and rents are scaled from HUD's El Monte rent benchmarks; neither has been checked against an El Monte builder's quote or listing. They are not quotes, bids or appraisals.
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El Monte Municipal Code 17.110.030(R) still requires owner occupancy for every junior ADU. Government Code 66333(b) requires it only when sanitation is shared, and the City's April 2026 ADU/JADU Addressing Policy follows that state rule. Ask Building & Safety how it applies the discrepancy.
No. El Monte Municipal Code 17.110.030(H)(1) expressly says no parking is required for a junior ADU.
Government Code 66333(d) counts an attached garage as part of the single-family residence, within whose walls a junior ADU must fit. Government Code 66313(d) caps it at 500 sq ft of interior livable space, and El Monte Municipal Code Table 17.110-1 permits one junior ADU on a single-family lot.
Neither. It is a screening from public records, not professional advice, and not a survey, soils report, appraisal, loan offer or permit; every number is an estimate. A licensed designer confirms the final plan, and your city or county gives final approval.