Monterey's Accessory Structures: The Rules That Matter

Every city handles accessory structures a little differently. In Monterey, California, there are 3 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Garage Conversions

Converting a garage to living space in the City of Monterey requires a building permit and zoning review for egress, light/ventilation and parking; converting to a separate unit is often processed as an ADU under state law.

Key details: Permit: Building permit required. If Separate Unit: ADU rules apply. Parking: Often not required (ADU). Authority: Building / planning.

Contact your local code enforcement office for specific penalty information.

Shed Rules

Sheds in the City of Monterey must meet zoning setback rules for accessory structures. Under the California Building Code, a building permit is generally required for sheds over 120 square feet; smaller sheds still must meet placement rules.

Key details: Permit Threshold: Over 120 sq ft. Setbacks: Per zoning. Code Basis: CA Building Code. Authority: Building / planning.

Contact your local code enforcement office for specific penalty information.

ADU Rules

California's statewide ADU law (Gov. Code §65852.2) requires the City of Monterey to allow accessory dwelling units on residential lots by right — detached ADUs up to 1,200 sq ft, 4-foot side/rear setbacks, no owner-occupancy requirement, and no added parking within ½ mile of transit.

Key details: State Law: CA Gov. Code §65852.2. Approval: By right (ministerial). Max Detached: 1,200 sq ft. Setbacks: 4 ft side/rear.

Contact your local code enforcement office for specific penalty information.

Monterey is more permissive than most cities when it comes to adu rules. That said, there are still limits.

The Bottom Line

Monterey's accessory structures rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Monterey is broadly strict or permissive.

These rules come from Monterey's publicly available municipal code. For complete penalty schedules, exemption details, and answers to common questions, see the individual ordinance pages throughout this guide.