Permit Required? Sometimes Required
Typical Fee Range $125–$350 Exempt if 200 sq ft or less and detached; $125 minimum fee for permitted work (2026).
Fee Method Valuation-based
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What's Required in Portland

  • No permit required for detached accessory structures up to 200 square feet.
  • Must be one-story and not used for human habitation or living space.
  • Must maintain 3–5 foot setbacks from property lines and 6 feet from the primary house.
  • Any shed with electrical wiring, plumbing, or mechanical work requires a permit regardless of size.
  • Maximum height is 15 feet from grade to the highest point for exempt structures.
  • Structures over 200 sq ft must meet Oregon Residential Specialty Code standards.

What Size Shed Needs a Permit in Portland

Whether you need a building permit for a shed in Portland usually comes down to size. In Portland, the cutoff is clear: detached sheds of 200 square feet or less don’t need a building permit, while anything larger does. A popular 10x12 shed (120 sq ft) comes in under the limit, so it typically doesn’t need a building permit. Larger sheds, and any shed with electrical, plumbing, or a permanent foundation, almost always need a permit regardless of footprint.

Building a Shed Without a Permit in Portland

Even when a shed is small enough to skip a building permit in Portland, “no permit” doesn’t mean “no rules.” A permit-exempt shed generally must stay at or under the 200-square-foot limit, sit on a non-permanent base (sheds on skids or a gravel pad are treated more leniently than those on a poured foundation), and have no electrical or plumbing run to it. Crucially, zoning setbacks still apply — your shed usually has to sit a minimum distance from property lines and other structures, and that holds even for a permit-free shed. Confirm both the size exemption and the setback distance with the Portland Permitting & Development before you build.

How to Get a Shed Permit in Portland

1

Step 1: Size Verification

Measure the footprint to determine if the 200 sq ft exemption applies.

2

Step 2: Check Zoning Map

Verify setbacks and impervious area limits for your specific residential zone.

3

Step 3: DevHub Submission

Submit a 'Building' permit request on the Development Hub PDX portal if over threshold.

4

Step 4: Fee Payment

Pay the valuation-based permit and plan check fees ($125 minimum).

5

Step 5: Inspection

Schedule a final structural inspection once the shed is anchored.

Frequently Asked Questions

No, a 120 sq ft shed is under the 200 sq ft exemption threshold.
Typically 15 feet max; structures taller than 10 feet may have increased setback rules.
No, Portland zoning restricts accessory buildings to the side and rear yards.
In Portland, sheds of 200 square feet or less can be built without a building permit; anything larger needs one. The exemption usually also requires no permanent foundation and no electrical or plumbing, and zoning setbacks from property lines still apply even without a permit.
Often not, if it’s also within Portland’s 200 sq ft limit and has no utilities — many jurisdictions treat a shed on skids or a gravel pad as movable rather than a permanent building. A poured foundation or any electrical/plumbing typically triggers a permit. Confirm with the Portland Permitting & Development; zoning setbacks apply either way.