ADU Regulations in Rolling Hills, California (2026)

Regulations at a glance

Local rules & notes

SB 1211 Multifamily Expansion: Lots with existing multifamily dwellings can now add up to eight detached ADUs, provided the number does not exceed the number of existing units on the lot. AB 2533 Unpermitted ADU Amnesty: The city must provide a pathway to permit previously unpermitted ADUs and JADUs, providing protections for homeowners seeking to legalize existing structures. Neighborhood Compatibility Ban: The city's requirement for a neighborhood compatibility determination for two-story attached ADUs is an illegal additional standard under state law.

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

Frequently asked questions about ADU regulations in Rolling Hills

• What is the maximum ADU size in Rolling Hills, California?

  In Rolling Hills, the maximum ADU size is typically 800 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; Rolling Hills may follow state defaults or have local limits. Verify with Rolling Hills planning for your specific lot.

• What are the setback requirements for ADUs in Rolling Hills?

  In Rolling Hills, 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 Rolling Hills planning for overlay zones or design standards that could affect your site.

• What is the maximum height for an ADU in Rolling Hills?

  In Rolling Hills, 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 Rolling Hills or county planning for your zone.

• Is ADU approval ministerial in Rolling Hills?

  In Rolling Hills, 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; Rolling Hills planning can confirm the exact process.

• Are there parking requirements for ADUs in Rolling Hills?

  In Rolling Hills, parking for ADUs is generally Often waived per state law; check local ordinance. California law often waives parking for ADUs within a half-mile of transit or in certain historic districts. Check with Rolling Hills planning for your address.