ADU Regulations in Gridley, California (2026)

Regulations at a glance

Local rules & notes

Gridley-Specific Streamlining (AB 430): Gridley is one of a few specific cities granted a streamlined ministerial approval process for specified housing developments under AB 430. Separate Sale to Nonprofits (AB 587): Allows ADUs to be sold separately from the primary residence if sold to a qualified nonprofit buyer.

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

Frequently asked questions about ADU regulations in Gridley

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

  In Gridley, the maximum ADU size is typically 850 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; Gridley may follow state defaults or have local limits. Verify with Gridley planning for your specific lot.

• What are the setback requirements for ADUs in Gridley?

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

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

  In Gridley, 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 Gridley or county planning for your zone.

• Is ADU approval ministerial in Gridley?

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

• Are there parking requirements for ADUs in Gridley?

  In Gridley, 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 Gridley planning for your address.