Accessory Structures in Tracy, CA

If you live in Tracy or are thinking about moving there, accessory structures are one of those things you probably won't think about until they affect you directly. Tracy has 3 specific rules on the books covering different aspects of accessory structures, and some of them might surprise you.

Shed & Carport Rules

A backyard shed in Tracy skips the building-permit process entirely if it's a one-story, detached tool or storage shed, playhouse, or similar structure no larger than 120 square feet with a story height of 11 feet 7 inches or less, under Tracy Municipal Code § 9.04.050's amendment to California Building Code § 105.2. Anything bigger needs a full permit and must meet zoning setbacks.

Key details: Permit-exempt size: ≤120 sq ft floor area. Permit-exempt height: ≤11 feet 7 inches. Governing section: TMC § 9.04.050 (amends CBC § 105.2). LDR accessory setback: 6 ft between buildings, TMC § 10.08.1220. Over threshold: Full building permit and zoning review required.

Building a shed that exceeds 120 square feet or 11 feet 7 inches in height without first obtaining a permit violates Tracy Municipal Code § 9.02.040 and is enforced as an infraction under § 1.04.030: up to $100 for a first offense, $200 for a repeat within twelve months, and $500 for each further repeat within that period, escalating to a misdemeanor after two convictions for the same violation in a year.

ADU Rules

Tracy allows one accessory dwelling unit on any residentially zoned lot with a single-family home under Municipal Code section 10.08.3180, capped at 1,200 square feet or 50 percent of the primary home's living area for an attached unit. Setbacks generally match the primary dwelling, but converting an existing garage into an ADU requires no setback at all, and most ADUs need only one extra parking space.

Key details: Units allowed: One ADU per lot with one single-family home. Detached size cap: 1,200 square feet. Attached size cap: 50% of primary home or 1,200 sq ft. Garage-conversion setback: None required. Separation distance: 6 feet from primary dwelling.

An ADU built without meeting the size, setback, distance or parking standards of TMC 10.08.3180, or a second ADU added to a lot that already has one, is a zoning violation subject to the City's standard enforcement tools under 10.08.3105: denial or revocation of the building permit, an administrative citation under chapter 1.28, or nuisance abatement under chapter 1.32. Selling an ADU separately from the primary dwelling also violates subsection (b)(1).

Tiny Homes

Tracy allows tiny homes as a primary single-family dwelling or in place of an ADU on any lot zoned for single-family use under Municipal Code Section 10.10.214. The structure is capped at 400 square feet, must sit on a permanent foundation engineered for Seismic Zone D, and needs one on-site paved parking space, but no separate garage or carport.

Key details: Maximum size: 400 gross square feet. Maximum width: 14 feet. Foundation requirement: Permanent, Seismic Zone D rated. Parking required: 1 on-site paved space, no garage. Wheeled tiny homes: Mobile home parks only.

A tiny home installed without the required foundation, parking space, or utility connections, or one placed on wheels outside a designated mobile home park, is a Title 10 zoning violation. Under Section 10.08.4900, the Community Development Director and authorized staff may issue a citation or a stop order halting further construction or occupancy until the deficiency is corrected, and the City may record a notice of violation against the property under Section 10.08.4905 if the owner fails to fix it.

The Bottom Line

Tracy'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 Tracy is broadly strict or permissive.

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