ADU Regulations in Redlands, California (2026)

Regulations at a glance

Local rules & notes

Direct Application of State Law: The City of Redlands is currently bypassing its own non-compliant municipal code in favor of direct application of California State ADU Law due to HCD findings. Outdated 'Second Unit' Terminology: The city's existing code (Sections 18.156.430 through 18.156.460) uses the obsolete term 'second unit' and is considered legally insufficient by the state.

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

Frequently asked questions about ADU regulations in Redlands

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

  In Redlands, the maximum ADU size is typically 1200 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; Redlands may follow state defaults or have local limits. Verify with Redlands planning for your specific lot.

• What are the setback requirements for ADUs in Redlands?

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

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

  In Redlands, 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 Redlands or county planning for your zone.

• Is ADU approval ministerial in Redlands?

  In Redlands, 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; Redlands planning can confirm the exact process.

• Are there parking requirements for ADUs in Redlands?

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