Phoenix Shed Permits: The 200 Sq Ft Rule and Fees

Do you need a shed permit in Phoenix?

Not if the shed is 200 square feet or less. Phoenix adopted the 2024 Phoenix Building Construction Code, effective August 2025, and in it the city struck the model code's 120 square foot figure and wrote in 200. The exemption covers one-story detached accessory structures used as tool and storage sheds, playhouses, non-cantilevered shade structures and similar uses, provided the structure complies with the Phoenix Zoning Ordinance.

That is a real local advantage. Much of the country works from a 120 square foot exemption, and Seattle for instance holds to exactly that. A Phoenix homeowner can put up a 200 square foot shed, roughly 10 by 20, with no building permit at all. For statewide context see our Arizona shed permit guide, and for the national baseline the complete shed permit guide.

Two more carve-outs ride along in the same sentence and are worth knowing:

• Non-cantilevered shade structures are named in the exemption, so a freestanding shade structure under 200 square feet is treated like a shed.
• Unaltered intermodal shipping containers up to 320 square feet are exempt. If the container is modified, it is not.

One condition kills the exemption regardless of size: utilities. If power, water or gas is provided to a detached accessory structure that is otherwise exempt, a permit is required for the installation of those utilities.

A caution on older city documents. Phoenix still hosts a 2013 zoning FAQ stating the threshold is 120 square feet. That page is superseded by the 2024 code. Use 200.

The corner lot height rule that rules out stock sheds

Height in Phoenix is a zoning rule, and it applies whether or not a permit is needed. For an accessory structure located in a required rear or side yard:

• Maximum 15 feet, confirmed by the city's own zoning adjustment hearing records, which show a 17-foot structure needing a use permit against a 15-foot maximum

Phoenix has also drafted a lower cap for structures close to a street side property line, which would bite on corner lots. We could not confirm that figure in adopted code rather than a proposal, so we are not publishing a number for it. If you are on a corner lot, ask the Zoning counter what applies before buying a stock gable shed. Moving the shed just 5 feet further in raises the cap to 15 feet. Above 15 feet, even at the greater distance, you need a use permit.

An accessory structure that is not in a required yard and meets the house's own setbacks follows the house's height limits instead, generally two stories or 30 feet in single-family districts.

Setbacks and lot coverage

The accessory structure rules in the Phoenix Zoning Ordinance are refreshingly simple. The figures below are the ones the city's zoning adjustment records confirm it enforces:

• Minimum 3 feet from a side or rear property line
• Not permitted in the required front yard. An accessory structure between the house and the front property line, even behind the front setback, needs use permit approval

Three feet is a genuinely permissive number, and it is enforced. Zoning adjustment hearings routinely deny variance requests to reduce it further, which tells you the city treats it as a floor rather than a starting point.

Lot coverage comes from the base zoning district rather than the accessory rules:

• R1-6, R1-8, R1-10: 50 percent, plus an additional 10 percent for an accessory dwelling unit or attached shade structures, for 60 percent total
• R1-18: 30 percent, plus 10 percent, for 40 percent total
• RE-24 and R1-14: 25 percent of net lot area, or up to 40 percent if all structures are one story and under 20 feet
• RE-43: 20 percent, with the same one-story alternative

Second stories do not count toward coverage. Note that the widely repeated figure of 40 percent for R1-6 comes from the same stale 2013 FAQ and is out of date.

Shade structures, ramadas and carports

Phoenix is a city where this distinction matters, and the dividing line is detached versus attached, not what you call the thing.

Detached and 200 square feet or less means no building permit. The exemption names non-cantilevered shade structures directly, and the city's guidance extends it to ramadas and gazebos as similar uses.

Attached means a building permit at any size, because the exemption covers only detached structures. An attached patio cover or carport that meets the prescriptive requirements of the residential code is eligible for a same-day over-the-counter permit, so the extra step is real but small.

One more distinction: shade cloth structures used for nursery or agricultural purposes are separately exempt, which is an agricultural provision rather than a backyard shade sail allowance. And attached shade structures count toward lot coverage, drawing on that extra 10 percent allowance in the R1 districts.

Build for 105 mph wind, and no frost footings

Phoenix's adopted climatic and geographic design criteria are unusual in a way that helps:

• Wind speed: 105 mph. This is the number an anchoring or tie-down design has to meet, which matters in monsoon season.
• Frost line depth: zero. No deep footings required, unlike most of the country.
• Seismic design category B, weathering negligible, termite risk moderate to heavy.
• Not in a special wind region, and not a windborne debris zone.

The zero frost line is a genuine Phoenix advantage for a shed foundation. The termite rating is the counterweight and should drive material choice for anything in ground contact.

What a permitted shed costs and how long it takes

Phoenix publishes no flat shed permit fee. The fee is computed from valuation: the shed's square footage multiplied by a published rate for its construction type, run through the permit fee table.

Phoenix publishes no shed fee and does not say which construction type a shed is valued as, and the plan review fee applies only where a plan review is required, so a total cannot be stated honestly in advance. Take your square footage and construction type to the Residential Services Counter on 602-261-8078 and have them run it.

One figure to ignore: a $98 fee circulates widely for Phoenix accessory buildings. It is real, but it sits under demolition and move-off permits in the fee schedule. It is not a new construction shed fee.

On timing, Phoenix publishes monthly turnaround data but has no category for detached accessory structures. Its smallest residential category, minor remodels and additions, carries a 20 calendar day goal against a 24 day recent average, which is the nearest published figure rather than a shed timeline. But there is a much faster path: single-level detached accessory structures with 500 square feet or less of habitable area that comply with the prescriptive requirements of the residential code can be issued over the counter, same day.

That fast lane closes if your project needs design review, hillside, grading, floodplain or historic review. Those approvals have to be obtained first, and the project drops back into the standard plan review queue.

Hillside lots and historic districts

Hillside review is triggered on any project on a property with a slope of 10 percent or greater. On a single-family hillside lot you may develop 35 percent of the lot or 20,000 square feet, whichever is less, with a maximum 25 percent allowable under roof. A shed roof counts against that allowance. Side setbacks become the zoning district requirement or 10 feet, whichever is greater.

Historic districts carry an HP or HP-L zoning overlay, and here Phoenix's own documents pull in two directions. The historic preservation handouts say the certificate process applies only to exterior work that requires a building permit, which would exclude an exempt shed. The live historic preservation FAQ says no structure may be erected in an HP or HP-L district without review by the historic preservation office. Given that conflict, the honest advice is to call historic preservation at 602-261-8699 before building any shed in an overlay district, exempt or not.

Where review does apply, minor work clearly within the design guidelines, described as including a small outbuilding not visible from the street, can get a Certificate of No Effect, often approved within a few days. More complex or street-visible work needs a Certificate of Appropriateness, which requires a pre-application meeting, a posted sign, and a public hearing.

Building a shed without a permit in Phoenix

Because the exemption is generous, the more common Phoenix problem is not a missing permit but a zoning violation on a shed that never needed one. The code is explicit that exemption from permit requirements does not authorize work that violates the zoning ordinance or any other city law, and the exemption itself is written as conditional on zoning compliance.

In practice that means the three-foot setback, the front yard prohibition, the corner lot 8-foot height cap and the lot coverage limit all bind a permit-free shed exactly as they bind a permitted one. Nobody checks them at the counter, because there is no counter visit. Checking your zoning district and your distance to a street side property line before you build is the difference between a finished project and moving a shed.