ADU Regulations in Lincoln, California (2026)

Regulations at a glance

Local rules & notes

Subjective Design Standards: The City ordinance requires 'similar exterior materials', 'same trim location', and 'matching windows'. HCD flags these as invalid subjective standards. JADU Garage Prohibition: The City ordinance incorrectly states JADUs must be within the 'dwelling structure' and excludes attached garages. HCD clarifies attached garages are eligible. Multifamily Detached Unit Cap: The City limits detached ADUs on multifamily lots to 2. HCD notes that under SB 1211 (2025), up to 8 are allowed on existing multifamily lots. Front Setback Requirement: The City requires front setbacks matching the primary residence. HCD states this must be waived if it precludes construction under state safe harbor rules.

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

Frequently asked questions about ADU regulations in Lincoln

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

  In Lincoln, the maximum ADU size is typically 1000 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; Lincoln may follow state defaults or have local limits. Verify with Lincoln planning for your specific lot.

• What are the setback requirements for ADUs in Lincoln?

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

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

  In Lincoln, 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 Lincoln or county planning for your zone.

• Is ADU approval ministerial in Lincoln?

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

• Are there parking requirements for ADUs in Lincoln?

  In Lincoln, 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 Lincoln planning for your address.