ADU Regulations in Marysville, California (2026)

Regulations at a glance

Local rules & notes

Tiny House Minimum Size Exemption: While standard ADUs must be at least 300 square feet, tiny houses used as ADUs are specifically exempt from this minimum size requirement. Annual Owner-Occupancy Renewal: Owners are required to file a declaration of owner-occupancy prior to permit issuance and must renew this declaration annually with the planning department. Public Notice for Conversions: Applications to convert existing detached accessory structures into ADUs are subject to public notice criteria, unlike standard ministerial ADU approvals.

For the official ordinance and latest updates, check your city or county planning department.

Frequently asked questions about ADU regulations in Marysville

• What is the maximum ADU size in Marysville, California?

  In Marysville, the maximum ADU size is typically NaN square feet, depending on whether the unit is attached or detached. California state law allows up to 1,200 sq ft for detached ADUs and 800 sq ft for attached in many jurisdictions; Marysville may follow state defaults or have local limits. Verify with Marysville planning for your specific lot.

• What are the setback requirements for ADUs in Marysville?

  In Marysville, typical setback requirements are 4 feet from the side property line and 4 feet from the rear. These may be reduced to 4 feet under California Government Code § 65852.2 where applicable. Check with Marysville planning for overlay zones or design standards that could affect your site.

• What is the maximum height for an ADU in Marysville?

  In Marysville, the maximum height for an ADU is generally 16 feet. State law often allows up to 16 feet for detached ADUs and up to 25 feet when within 4 feet of the property line in some cases. Confirm with Marysville or county planning for your zone.

• Is ADU approval ministerial in Marysville?

  In Marysville, ADU approval is typically Ministerial (by-right) per Gov Code §65852.2. Ministerial (by-right) review means the city must approve qualifying applications without discretionary review, per California Gov Code § 65852.2. Your project must still meet objective standards; Marysville planning can confirm the exact process.

• Are there parking requirements for ADUs in Marysville?

  In Marysville, parking for ADUs is generally true. California law often waives parking for ADUs within a half-mile of transit or in certain historic districts. Check with Marysville planning for your address.