Shed & Accessory Structure Permits in Los Angeles

The short answer: it depends on who issues your permit

Owners searching for shed permit rules usually find one confident number: 120 square feet. That number is real, but it is not a universal Los Angeles rule. It comes from a specific official source, Los Angeles County Public Works guidance for unincorporated County areas, and it does not automatically apply inside the City of Los Angeles or in the independent cities such as Glendale, Pasadena, Burbank, or Santa Monica. Before you order a prefab kit, the first question is not how big the shed is. It is which building department has jurisdiction over your parcel.

In the City of Los Angeles, the Department of Building and Safety (LADBS) administers the Los Angeles Building Code, which is part of the Los Angeles Municipal Code (LAMC). LAMC Section 91.106.1.1 requires a building permit for construction work, and LAMC Section 91.106.2 lists the specific local exceptions. In unincorporated communities such as Altadena, East Los Angeles, or Topanga, the County Building Code and County Building and Safety apply. Each independent city adopts and amends its own code. A rule that is correct in one of those places can be wrong a few blocks away.

This guide explains what the County guidance actually says, why it cannot substitute for a City rule, what zoning and trade permit layers apply even when a building permit is not required, and how the LADBS review process works when a permit is needed.

• Garden and tool storage sheds
• Prefab and kit accessory buildings
• Workshops, hobby rooms, and home offices
• Art studios and music rooms
• Playhouses and pool equipment enclosures
• Sheds being rebuilt after a fire

What the LA County 120-square-foot guidance says, and what it does not

Los Angeles County Public Works publishes an FAQ answer stating that a detached, one-story accessory building used as a tool or storage shed, playhouse, or similar use is exempt from a building permit if the floor area does not exceed 120 square feet gross, the height does not exceed 12 feet, and the roof projection does not exceed 24 inches. The same guidance is explicit about the limits of that exemption: all zoning requirements still apply, and electrical, plumbing, and mechanical permits are separately required when that work is included.

That is County guidance for parcels under County building jurisdiction. It is not a California-wide entitlement and it is not a City of Los Angeles rule. The model code provisions that similar exemptions are based on, California Building Code Section 105.2 and California Residential Code Section R105.2, sit in administrative chapters that local jurisdictions adopt, amend, or replace. Health and Safety Code Section 17922 establishes the state building standards framework that local codes build on; it does not grant a free zoning entitlement for any shed size, and no Health and Safety Code section creates a direct 120-square-foot shed exemption that overrides local administration.

You may also find older publications that describe a 64-square-foot threshold. We do not rely on those for current projects. Code editions and local administrative provisions change, and a document from a prior code cycle should not decide whether you need a permit today.

Inside the City of Los Angeles: verify the exact LADBS exception

The City adopted the 2025 California codes with local amendments through Ordinance 188797, effective for the 2026 code cycle. Under that ordinance, the administrative provisions in Chapter 1 of the Los Angeles Building Code govern residential accessory structures as well as other buildings, and the list of exceptions in LAMC 91.106.2 does not contain a blanket 120-square-foot shed exemption. In other words, the County number cannot simply be imported into a City parcel.

Practically, City applicants should identify the exact LADBS exception that applies to their structure, by section number, before buying a kit or pouring a pad. If no listed exception fits, plan for a permit. Many small accessory buildings in the City are processed quickly, sometimes through express or counter review, so needing a permit does not have to mean a long schedule. It does mean drawings that show the structure, its location, and its relationship to property lines and other buildings.

If someone tells you a shed under a certain size never needs anything in Los Angeles, ask which code section they are citing and which jurisdiction it belongs to. That single question resolves most of the confusion we see.

Zoning applies even when a building permit does not

A building permit exemption, where one exists, only answers the building code question. Zoning is a separate layer, and it always applies. In the City of Los Angeles, accessory buildings are regulated under LAMC Section 12.21 C.5, which addresses accessory building location and yards, and Section 12.21 C.5(d), which addresses separation between accessory buildings and the main building. The current LADBS Counter Plan Check Correction Sheet references both provisions, which tells you plan checkers are looking at them.

There is no universal zero setback for sheds in Los Angeles, and the four-foot side and rear setback associated with many detached ADUs is not an automatic rule for a storage shed. Allowed placement depends on the zone, lot configuration, whether the structure sits in a required yard, its height, and its distance from the house. Specific plans, Historic Preservation Overlay Zones, hillside designations, and other overlays can add their own limits. We confirm the parcel profile in ZIMAS before recommending a location.

Private rules sit on top of all of this. HOA covenants and CC&Rs are not enforced by LADBS, but they can still require approval of a shed's size, color, or position.

Storage, workshop, or habitable space: use decides the path

The intended use of an accessory building changes the code path more than its size. A storage shed holds tools, bikes, and garden equipment. A workshop or hobby room adds people working inside, often with power tools, lighting, and dust collection. A home office or studio adds conditioned space, outlets, and sometimes a sink. A habitable room for sleeping or living is a dwelling question, and a building with independent living facilities for sleeping, eating, cooking, and sanitation is reviewed as an accessory dwelling unit or, within the house, a junior ADU.

Relabeling does not change the use. Calling a structure a shed on the application while finishing it with insulation, a bed, a kitchenette, and a bathroom is not a storage shed, and inspectors and plan checkers look at what is built rather than what it is called. Using a non-habitable accessory building as a residence can trigger enforcement and leaves the owner with a structure that was never reviewed for egress, light, ventilation, energy, fire separation, or sanitation.

If you want a backyard building someone will live or sleep in, design it as an ADU from day one. State ADU law and the City's ADU program offer meaningful pathways, and a properly permitted ADU adds legal, rentable space. Our ADU permit service handles that path.

Electrical, plumbing, and mechanical permits are separate

Even where a structure is exempt from a building permit, trade work is not automatically exempt. The County guidance says so directly, and the same principle runs through City review. A circuit run from the house to a shed, a subpanel, outlets, lighting, a mini-split heat pump, an exhaust fan, a utility sink, a hose bib with a new line, or a gas line for a heater each brings electrical, plumbing, or mechanical permit requirements.

Trenching for conduit or piping, burial depth, GFCI protection, panel capacity, and disconnecting means are all inspected. A workshop with heavy tool loads may need a service evaluation. This is also where many unpermitted sheds get discovered: a later panel upgrade or sale inspection reveals an extension cord culture that was never permitted.

Foundations, grading, drainage, and site conditions

Kit sheds are often sold with a floor system intended to sit on blocks or a gravel pad. Larger or permitted accessory buildings typically need a foundation designed for gravity, wind, and seismic loads, with anchorage to resist uplift and sliding. A concrete slab for a workshop raises questions of thickness, reinforcement, and footing depth at the perimeter.

Site work can trigger its own review. Cutting into a slope, building a retaining wall to create a flat pad, importing or exporting soil, or placing a structure on a hillside parcel can bring grading permits, hillside ordinance limits, and in some cases geotechnical information. Drainage matters on every lot: roof runoff from a new building must not be directed onto a neighbor's property, and a pad that blocks an existing drainage path can create a problem the inspector will notice. Protected trees and their root zones also limit where foundations go.

Fire separation, fire hazard zones, and rebuilds

Distance matters. An accessory building close to a property line or to the main house can raise fire-separation questions under the building code, including wall ratings, opening limits, and eave projections, in addition to the zoning separation provisions noted above. In a mapped Very High Fire Hazard Severity Zone, ignition-resistant construction requirements and defensible space rules may affect materials, vents, and placement. A wood shed against a fence on a fire hazard parcel is the kind of condition fire agencies flag.

Fire rebuild owners frequently ask whether a lost shed or workshop can be replaced at the same time as the house. Pacific Palisades is in the City of Los Angeles, so LADBS reviews it under City rules and any applicable emergency orders. Altadena is unincorporated County, so County Building and Safety and the County guidance apply there. Accessory structures can often be included in a rebuild strategy, but whether a replacement fits a like-for-like path depends on the size, use, and location compared with what legally existed before. Confirming prior permits early saves time.

The LADBS accessory structure process, step by step

First, we confirm jurisdiction by address and parcel number, then pull the ZIMAS profile for zoning, overlays, hillside, fire hazard, and other designations. Second, we pull LADBS permit records to understand what was legally built on the lot, because an existing unpermitted structure nearby can complicate a new one. Third, we identify whether a specific LAMC 91.106.2 exception applies to the proposed structure. If it does, we document why and still flag the zoning and trade permit layers. If it does not, we prepare for a permit.

For a permit, the package usually includes a plot plan showing property lines, the main building, the new structure, dimensions to each, and existing accessory buildings; floor plan and elevations with height; foundation and framing details or manufacturer drawings with engineering for prefab units; and any electrical, plumbing, or mechanical scope. Smaller scopes may qualify for express or counter review; others go through ePlanLA electronic plan check.

Plan check corrections for accessory buildings commonly involve the separation and yard provisions, height measurement, incomplete plot plans, missing anchorage details, and fire separation near property lines. We answer each correction in a matrix tied to a sheet and resubmit once. After issuance, inspections typically follow construction: foundation or footing, framing and anchorage, trade rough-ins where applicable, and final. The permit is not complete until the final inspection is signed off.

• Confirm jurisdiction and ZIMAS profile
• Pull permit history for the lot
• Identify the exact exception, or plan a permit
• Prepare plot plan, elevations, and structural details
• Express, counter, or ePlanLA plan check
• Corrections, issuance, inspections, and final

Already built without a permit?

Many Los Angeles properties have sheds, studios, and workshops that were built without review. Options usually include legalizing the structure with as-built drawings and any required upgrades, reducing it to fit a genuine exception, or removing it under a demolition permit where one is required. Converted sheds used as living space are the most sensitive situation, and often the best outcome is a properly permitted ADU. Our guides to legalizing unpermitted work and demolition permits cover those paths.

Ocean Permits can manage your accessory structure permit

Ocean Permits & Development is a women-owned Los Angeles permit expediting firm founded in 2021 by Katherine Amaya. We help homeowners and businesses confirm jurisdiction, identify the correct exception or permit path, coordinate drawings with your designer or kit manufacturer, and move the application through review, inspections, and final. Fire rebuild permitting in Pacific Palisades and Altadena is a core specialty.

Call 213-277-8777 or contact us for a free consultation. Send the address, the kit or design you are considering, its intended use, and a photo of where it will go. We will tell you which agency controls it and what to confirm before you buy.

Accessory structure scenarios and review questions

Illustrative scenarios for planning only, not descriptions of specific client projects or legal determinations.

Estimated planning cost ranges

These are Ocean Permits nonbinding planning ranges for budgeting conversations. They are not official LADBS or County fees, not flat fees, and not quotes. Agency fees follow published schedules based on valuation and scope.

Estimated planning ranges only. Confirm official fees with LADBS fee schedules or County Building and Safety for your specific application.

Frequently Asked Questions