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Shed Permit Checker

Find out which factors trigger a permit for your build — then walk into the conversation with your building department already knowing exactly what to ask.

  • Plain-English risk read
  • Printable question checklist

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Educational guidance, not legal advice or a permit decision. Always confirm with your local building department.

Your permit read appears here

You'll get a plain-English risk assessment, the factors that raise a flag, and a printable list of exactly what to ask your building department.

Permits, honestly

Why no tool can just tell you "yes" or "no"

And why the useful answer is knowing which questions to ask.

There is no national shed permit rule

Permit requirements are set locally — there are thousands of permitting jurisdictions in the US, and they genuinely disagree with each other. Any website that claims to know whether your shed needs a permit is guessing, and a confident wrong answer is worse than no answer.

So this tool does something more honest and more useful: it works through the factors that commonly trigger a permit or a separate approval, tells you which ones apply to your plan, and hands you the exact questions to confirm with the one authority that can actually answer them — your local building department.

The factors that decide it

  1. Floor area. Two thresholds recur: the 120 sq ft limit many local codes still use, and the 200 sq ft exemption in the current IRC (R105.2). Work out your footprint first with the Size Calculator.
  2. Height. Many jurisdictions cap accessory-building height and require review above it.
  3. Foundation. A permanent slab or footings makes the shed a fixed structure, which is scrutinised more than a portable, skid-mounted one.
  4. Utilities. Running electrical or plumbing almost always needs its own permit and inspection, whatever the shed's size.
  5. Placement. Zoning setbacks govern how close you can build to a property line — a separate approval from a building permit.
  6. Use. A habitable space — office, studio, sleeping — falls under far stricter rules. Our studio shed guide covers that step up.

The one call worth making

The single best thing you can do is phone your local building department before you buy materials. They'll tell you exactly what applies to your address in a few minutes. This checker exists to make that call productive — you arrive with a specific, personalised list rather than a vague "do I need a permit?"

It also matters because getting it wrong is expensive. Building without a required permit can mean fines, a stop-work order, a costly retroactive application, or being told to modify or remove the shed — and it can complicate a future sale.

What this tool is not

It is not legal advice, and it is not a permit decision. The thresholds it uses are national reference points; your local rules override them completely. Treat the result as preparation for a conversation, not a substitute for one — and read our disclaimer before relying on it.

Questions

Shed permit FAQ

Straight answers on permits, thresholds, setbacks and utilities.

Do I need a permit to build a shed?
It depends entirely on where you live, and no online tool can give you a definitive answer — there are thousands of permitting jurisdictions in the US, each with its own rules. What decides it is a handful of factors: floor area, height, foundation, whether you run electrical or plumbing, how close it sits to property lines, and whether it's habitable. This checker walks through those factors, tells you which ones commonly trigger a permit, and gives you a list of exactly what to confirm with your local building department.
What size shed can I build without a permit?
Two thresholds matter. Many local codes still use a 120 sq ft limit, while the current International Residential Code (IRC R105.2) exempts one-storey accessory buildings up to 200 sq ft. Your local rules override both, and size is only one factor — height, foundation, placement and utilities all count too. Under 120 sq ft the size factor alone often doesn't trigger a permit, but always confirm locally.
Does running electricity to a shed need a permit?
Almost always, yes — independently of the shed's size. Running power to an outbuilding typically requires its own electrical permit and inspection in nearly every jurisdiction, and the same goes for water or drainage. Even a small shed that wouldn't otherwise need a building permit usually does once you add utilities.
Do I need a permit if my shed is on skids and not a foundation?
It can help. A portable, skid-mounted shed is treated more leniently than one on a permanent slab or footings in many jurisdictions, because a permanent foundation makes it a fixed structure. But 'portable' isn't a universal exemption — size, placement and use still apply — so it's one of the things worth confirming with your building department.
What are setbacks, and why do they matter for a shed?
A setback is the minimum distance a structure must sit from your property lines, set by local zoning rather than the building code. Even a permit-exempt shed usually still has to respect setbacks, and placing one too close to a boundary is one of the most common reasons people are told to move or remove a shed. Typical minimums are often around 5 ft, but they vary widely, so confirm the exact figure for your lot.
Does an HOA affect whether I can build a shed?
Yes, and separately from any government permit. A homeowners' association can require its own written approval and impose stricter rules on size, colour, placement and materials than your municipality does. If your property is in an HOA, get its architectural approval alongside — not instead of — any building permit.
Is this permit checker legal advice?
No. It's an educational self-assessment built on national reference points like the IRC, and it deliberately never issues a permit decision — because it can't know your local rules. Treat it as a way to understand which questions apply to your build and to prepare for the conversation with your local building department, which is the only authority that can tell you what you actually need.
What happens if I build a shed without a required permit?
It's not worth the risk. Building without a required permit can lead to fines, a stop-work order, being required to apply retroactively (often at higher cost), or in some cases having to modify or remove the structure. It can also complicate a future home sale. A short call to your building department before you start is far cheaper than any of those outcomes.

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