ADU Regulations in Colton, California (2026)

Regulations at a glance

Local rules & notes

Proportional Transportation Impact Fees: Transportation fees for ADUs 750 sq. ft. or greater are not charged at the full Single Family rate but are calculated proportionally based on the size of the primary dwelling. Standard Plans for Accessory Structures: The fee schedule references standard plans for accessory structures, indicating a program that likely offers reduced fees or expedited review.

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

Frequently asked questions about ADU regulations in Colton

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

  In Colton, 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; Colton may follow state defaults or have local limits. Verify with Colton planning for your specific lot.

• What are the setback requirements for ADUs in Colton?

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

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

  In Colton, 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 Colton or county planning for your zone.

• Is ADU approval ministerial in Colton?

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

• Are there parking requirements for ADUs in Colton?

  In Colton, 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 Colton planning for your address.