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Technical Memo

Mill Valley ADU TA 2025

City of Mill Valley – Letter of Technical Assistance Accessory Dwelling Unit (ADU) Ordinance Repeal Request

City of Mill Valley

Issued: April 9, 2025

Summary

HCD provides technical assistance regarding Mill Valley's noncompliant ADU Ordinance 1330 (adopted November 15, 2021). Key points: • The City intends to exclusively use State ADU Law to process ADU applications rather than amending its ordinance • HCD advises that processing under state law alone does not satisfy Gov. Code § 66326(b) requirements • The City must either amend the ordinance to comply or formally adopt it with findings explaining compliance • HCD recommends the City repeal the noncompliant ordinance for clarity to ADU applicants • Keeping a noncompliant ordinance in the Code of Ordinances may confuse applicants

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