How San Leandro Handles Accessory Structures: A Practical Guide

San Leandro maintains 158 local ordinances across all categories, and 3 of those deal specifically with accessory structures. Here is a breakdown of what the city actually requires, what is prohibited, and where San Leandro falls on the strict-to-permissive spectrum compared to other cities.

ADU Rental Restrictions

San Leandro Municipal Code § 4-40-120 flatly states that 'hosted short-term rentals are prohibited in secondary dwelling units (ADUs).' California's Government Code protects an owner's right to build and permit an accessory dwelling unit, but it does not force a city to allow that unit's use as a short-term rental, and San Leandro carves ADUs out of Chapter 4-40 entirely.

Key details: ADU short-term rentals: prohibited, no exceptions listed. Governing exclusion: SLMC § 4-40-120. State law status: ADU construction rights unaffected. Only lawful ADU rental term: 30+ days or long-term tenancy. Unpermitted ADU rental falls under: Ch. 4-41 non-hosted ban.

Advertising or operating a short-term rental out of an ADU does not qualify for a Chapter 4-40 permit at all, so the City treats it as an unpermitted, non-hosted rental under Chapter 4-41: a first notice of violation is a misdemeanor with a $1,000 fine or up to six months in jail, escalating to a public nuisance declaration, an injunction action, and triple damages on a third violation within two years (§ 4-41-110).

This is one of the stricter rules in San Leandro's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.

ADU Rules

Section 2.04.388 lets any single-family lot add one ADU plus one JADU, or a two-family/multi-family lot add up to two detached ADUs, through ministerial review approved within 60 days. Setbacks drop to 4 feet, no parking is required, and short-term rentals under 31 days are banned.

Key details: ADUs per single-family lot: 1 ADU + 1 JADU. Detached ADUs on multi-family lot: up to 2. Max ADU size (single-family lot): 800-1,200 sq ft. Side/rear setback: 4 feet minimum. Parking required: None.

An ADU or JADU built outside the permitted number, size, setback or height standards of Section 2.04.388, or rented for 30 days or less in violation of Subsection I, is treated the same as any other Zoning Code violation under Section 5.24.112: chargeable as a misdemeanor (up to $1,000 fine, up to one year in County Jail) or, at the Zoning Enforcement Official's discretion, as an infraction, with each day of noncompliance a separate offense. The City can also issue a Notice to Abate under Section 5.24.116 requiring correction before pursuing further enforcement.

Shed & Carport Rules

A detached tool or storage shed in San Leandro skips the building permit if it is one story and 120 square feet or less, under Building Code Section 105.2. In the RD, RM, and RS residential districts, Zoning Code Section 2.04.348 still caps every accessory structure at 500 square feet, a six-foot separation from other buildings, and setbacks that grow with height.

Key details: Permit-exempt shed size: One story, 120 sq ft or less (§105.2). Max accessory structure size: 500 sq ft (§2.04.348), except ADUs. Required separation: 6 feet from other structures on the lot. Setback by height: 0 ft, 3 ft, or 5 ft depending on height. Lot coverage limit: 50%-70% of lot, depending on district.

Build a shed over 120 square feet, or in the wrong spot, without going through the Building Official and Zoning Enforcement Official, and it becomes an "Unpermitted Structure" under Section 105.1.1, which the owner is barred from using or maintaining until it is legalized or removed. Any Code violation, including a zoning setback or lot-coverage breach under Section 2.04.348, is prosecutable as a misdemeanor (up to $1,000 and six months in jail) or a lesser infraction under Section 1-12-200, and the City can order corrective work.

The Bottom Line

San Leandro'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 San Leandro is broadly strict or permissive.

This guide is based on San Leandro's current municipal code. Local rules can and do change, so check the individual ordinance pages for the latest details, penalties, and FAQs.