Fresno's Accessory Structures: The Rules That Matter

Every city handles accessory structures a little differently. In Fresno, California, there are 6 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.

ADU Owner Occupancy

Fresno does not require the owner to live on-site for a standard Accessory Dwelling Unit, but a Junior ADU is different: FMC § 15-2754(F)(1) requires the owner to reside in either the primary residence or the JADU itself, unless the owner is a government agency, land trust, or housing organization.

Key details: ADU owner-occupancy: Not required. JADU owner-occupancy: Owner must live in house or JADU. Institutional exception: Gov't agency, land trust, housing org. Section: FMC § 15-2754(F)(1). Effective: Ord. 2025-024, eff. 7-27-25.

A JADU built without the owner residing in either the primary residence or the JADU, outside the governmental-agency, land-trust, or housing-organization exception, is out of compliance with Section 15-2754(F)(1). The Development and Resource Management Department can withhold final approval, require a recorded deed restriction correction, or pursue code enforcement against the non-compliant unit until occupancy is restored.

ADU Rental Restrictions

Fresno bars short-term rental of Accessory Dwelling Units: FMC § 15-2754(F)(3) requires any Second Dwelling Unit that is rented to be leased for 30 consecutive days or longer, closing off nightly or weekend rentals of ADUs and JADUs city-wide.

Key details: Minimum rental term: 30 consecutive days. Applies to: ADUs and JADUs alike. Section: FMC § 15-2754(F)(3). Effective: Ord. 2025-024, eff. 7-27-25.

Renting an ADU or JADU for stays under 30 consecutive days violates Section 15-2754(F)(3). The Development and Resource Management Department and Code Enforcement can act on complaints or short-term rental listing activity, and a unit found operating on a nightly or weekly basis can be required to cease rental and come into compliance with the 30-day minimum before it may be leased again.

ADU Rules

Fresno processes Accessory Dwelling Units ministerially under FMC § 15-2754, allowing up to two ADUs plus one JADU on a single-unit lot. ADUs can reach 50% of the primary home's floor area or 1,400 square feet, stand up to 30 feet tall, and need no additional off-street parking.

Key details: Units allowed (single-unit lot): Up to 2 ADUs + 1 JADU. Max ADU size: 50% of home or 1,400 sq ft, greater. Max height: Underlying district or 30 ft. Parking required: None. Process: Ministerial per Gov. Code § 66310 et seq..

Building an ADU or JADU that exceeds the section's size, height, setback, or unit-count limits, or that skips the ministerial permit process required by Section 15-2754, is a zoning violation the Development and Resource Management Department can enforce by withholding occupancy clearance or requiring the structure be modified to comply before it may be used or rented.

Tiny Homes

Fresno permits a Tiny House on Wheels as an Accessory Dwelling Unit under FMC § 15-2754(C)(1)(a), but only if it meets every ADU standard in the section plus three extra conditions: ANSI certification, an engineered foundation system, and skirting enclosing the gap between the home and the ground.

Key details: THOW eligible as ADU: Yes, if all ADU standards met. Certification required: ANSI certified. Foundation: Engineered foundation system. Skirting: Must enclose home-to-ground gap. Section: FMC § 15-2754(C)(1)(a).

A Tiny House on Wheels placed on a Fresno lot without ANSI certification, an engineered foundation, or skirting enclosing its underside does not qualify as an ADU under Section 15-2754(C)(1)(a) and is not entitled to ADU status or its ministerial permit path; the Development and Resource Management Department can require the unit be brought into compliance or removed as an unpermitted structure.

Garage Conversions

Converting a garage to living space in Fresno generally means creating an Accessory Dwelling Unit under Fresno Municipal Code Section 15-2754, and California Government Code Section 66314 bars the City from requiring replacement of the parking spaces lost when a garage is converted to or demolished for an ADU.

Key details: Garage-to-ADU code section: FMC 15-2754 (state Gov. Code 66314). Replacement parking: Not required for ADU conversion (Gov. Code 66314(d)(11)). Non-habitable conversion limits: Toilet/shower/sink OK; no bathtub or stove (FMC 15-2004-C). Permit: Building permit required via Citizen Access portal. Covenant: Required for non-habitable accessory conversions.

An unpermitted garage conversion is a violation of the Building Code and FMC 15-2004/15-2754, enforced by Fresno Building and Safety Services and Code Enforcement. The City may require a permit, correction of unsafe conditions, or restoration of the garage. The City cannot, however, demand replacement parking for a converted garage that creates a qualifying ADU.

Shed & Carport Rules

In Fresno a one-story detached tool/storage shed of 120 square feet or less, no more than 12 feet high, and at least 3 feet from property lines needs no building permit; accessory structures on residential parcels of 10,000 sq ft or less are capped at 12 feet high and must comply with Fresno Municipal Code Section 15-2004.

Key details: Permit-exempt shed size: 120 sq ft or less, one story. Exempt shed height: 12 ft maximum. Minimum setback for exempt shed: 3 ft from property lines. Height cap (parcels <= 10,000 sq ft): 12 ft. Code Section: FMC 15-2004.

A shed exceeding 120 sq ft without a permit, placed in a required setback, or over the height limit is a violation of FMC 15-2004 and the Building Code, enforced by Fresno Code Enforcement and Building and Safety Services. Typical resolution is a notice of violation requiring a permit, relocation, or removal; unresolved violations can lead to administrative citations and abatement at the owner's expense.

Fresno is more permissive than most cities when it comes to shed & carport rules. That said, there are still limits.

The Bottom Line

Fresno'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 Fresno is broadly strict or permissive.

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