Do I Need a Permit to Build a Shed in Portland, OR?

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Project type City Shed size (sq ft) Stories Electrical work planned? Plumbing planned?

Fees

Estimated city fees

Baseline for a simple permitted deck: $200–$600 estimated city fees for a permitted shed (over 200 sq ft), plus 12% state surcharge; structures ≤ 200 sq ft and ≤ 15 ft tall typically require no building permit fee

Fee	Amount	Notes
Building permit (sheds over 200 sq ft)	$200–$600 (estimated range)	Fees are calculated from project valuation using ICC Building Valuation Data. Sheds are valued at 50% of the ICC U/VB cost per sq ft. A 12% State of Oregon surcharge is added. Use Portland's permit cost estimation tool for a project-specific estimate.
Electrical trade permit	$75–$200 (estimated range)	Required if the shed has any electrical wiring, outlets, or lighting, regardless of building permit status.
Plumbing trade permit	$75–$200 (estimated range)	Required if the shed includes plumbing fixtures.
State of Oregon surcharge	12% of permit fees	Applied on top of all Portland building permit fees.
School construction excise tax	$1.67/sq ft	Applied to residential construction in Portland.

Documents

Required documents

Completed residential building permit application through the Portland DevHub portal (devhub.portlandoregon.gov).
Site plan drawn to scale showing property lines, existing structures, setbacks, easements, and the proposed shed location and dimensions.
Floor plan and elevation drawings showing shed dimensions, height, roof pitch, wall and roof materials, and door or window locations.
Foundation plan showing slab, pier, or post design appropriate for the shed size and site conditions.
Structural details for prefabricated shed kits: manufacturer installation instructions and engineering documents.
Geotechnical engineering report if the lot slope exceeds 20%.
Erosion control plan or simple site form for ground-disturbing activity.
Property survey or recorded plat if the shed is near a setback line or shared property boundary.
HOA approval documentation if required by subdivision CC&Rs.
Homeowner authorization if a contractor files on the owner's behalf.

Timeline

Typical timing

Plan review: 10–20 business days
Total cycle: 4–8 weeks from application to final inspection

Permit-exempt sheds (≤ 200 sq ft, ≤ 15 ft tall) can proceed after confirming zoning compliance. Permits expire 180 days after issuance if no inspection is approved; each approved inspection extends the permit by 180 days. Check current review times on the Portland Permit Review Dashboard.

Process

How the permit process works

Determine whether your shed requires a permit Check the size and height of your shed. Structures 200 sq ft or less and 15 ft tall or less are generally exempt from a building permit. Sheds over 200 sq ft or over 15 ft tall require a building permit. On lots of 2+ acres, the exemption increases to 400 sq ft if the structure is 20+ ft from all property lines. Electrical and plumbing always require separate trade permits.
Verify zoning setbacks and lot coverage Even permit-exempt sheds must comply with Portland Title 33 zoning standards. Use PortlandMaps or call 503-823-7300 to verify your zone-specific setbacks, height limits, and the 20% lot coverage limit for detached accessories. Structures within 3 feet of a shared property line require fire-rated construction.
Check for overlay districts and environmental constraints Verify the proposed location for any overlay district requirements, tree preservation obligations (Title 11 applies on lots 5,000+ sq ft), and steep-slope or environmental constraints that may require a geotechnical report.
Prepare your site plan and drawings Draw a site plan showing the lot boundary, existing structures, setbacks, and the shed's footprint and dimensions. Prepare elevation drawings showing height, roof pitch, and materials. Include foundation and framing details for permitted sheds.
Submit through Portland DevHub Log in to DevHub at devhub.portlandoregon.gov, start a new residential permit application, and upload your plans. Portland offers a Residential Combination Permit Package that bundles structural, electrical, mechanical, and plumbing under one permit number.
Respond to plan review comments Portland targets 5–7 business days for re-review turnaround. Respond promptly to any plan check comments and resubmit updated documents through DevHub.
Receive permit and begin construction Download and post the permit at the job site. Do not start permitted work before the permit is issued. For exempt sheds, confirm zoning compliance before breaking ground.
Schedule and pass required inspections Request inspections through Portland's online system at the required stages: foundation, framing, and final. Trade permits (electrical, plumbing, mechanical) have their own inspection stages. Do not cover or conceal work before inspection.
Close out the permit After the final inspection passes, the permit is closed. Retain all documentation for insurance, title review, and future resale.

Code basis

What Austin reviews against

Oregon Residential Specialty Code (ORSC) as adopted by the City of Portland under Title 24; Portland Title 33 (Planning and Zoning) Chapter 33.110 (Single-Dwelling Zones) and Section 33.110.245 for detached covered accessory structure standards.

Residential permit page AB+C portal

If you skip the permit

What can go wrong

Portland code enforcement can issue a stop-work order if unpermitted construction is discovered.
Fines and penalties can accumulate until the violation is resolved through an after-the-fact permit or removal of the structure.
An after-the-fact permit may cost significantly more than the original permit and may require opening completed work for inspection.
Insurance claims involving shed damage or liability may be denied if the structure was unpermitted.
Unpermitted sheds that violate zoning setbacks or lot coverage limits can complicate real estate transactions and may require removal.
Unpermitted electrical work creates fire and safety hazards with no inspector verification.
Structures built without required erosion control or tree protection may trigger separate environmental code violations.

FAQ

Common Austin deck permit questions

Do I need a permit to build a shed in Portland, OR?

It depends on the size and height. Sheds of 200 square feet or less and 15 feet tall or less are generally exempt from a building permit under the Oregon Residential Specialty Code. Any shed larger than 200 sq ft or taller than 15 ft requires a building permit. On lots of 2+ acres, the exemption increases to 400 sq ft. Electrical and plumbing always require separate trade permits regardless of shed size.

What is the maximum shed size allowed without a permit in Portland?

On standard residential lots, sheds of 200 square feet or less (measured from interior of exterior walls) and 15 feet tall or less are exempt from a building permit. On lots of 2 acres or more, the exemption increases to 400 sq ft if the structure is at least 20 feet from all property lines and other structures. A zoning permit may still be required to confirm lot coverage compliance.

What are the setback requirements for a shed in Portland?

Setbacks are zone-specific under Portland Title 33 and must be verified for each parcel using PortlandMaps or by calling 503-823-7300. Structures within 3 feet of a shared property line require fire-rated construction. Detached covered accessory structures in single-dwelling zones are limited to 20 feet in height under Title 33.110.245.

Does adding electricity to my shed require a permit in Portland?

Yes. Any electrical work requires a separate electrical trade permit regardless of whether the shed itself is exempt from the building permit. Homeowners may self-perform electrical work on owner-occupied properties if not planning to sell or rent within 6 months; otherwise a licensed electrician is required.

Does adding plumbing to my shed require a permit in Portland?

Yes. Any plumbing fixtures require a plumbing trade permit regardless of shed size or building permit status.

How much does a shed permit cost in Portland?

Building permit fees are calculated from project valuation — sheds are valued at 50% of the ICC U/VB cost per sq ft — and typically run $200–$600 for a standard permitted shed. A 12% State of Oregon surcharge and $1.67/sq ft school construction excise tax are added. Permit-exempt sheds incur no building permit fee. Use Portland's online permit cost estimation tool for a project-specific quote.

How long does it take to get a shed permit in Portland?

Plan review times vary; check the Portland Permit Review Dashboard for current estimates. Re-reviews typically take 5–7 business days. Total project timing is roughly 4–8 weeks from application to final inspection. Permits expire 180 days after issuance if no inspection is approved.

What is the maximum height for a shed in Portland?

Detached covered accessory structures in single-dwelling zones are limited to 20 feet in height under Title 33.110.245. Structures 15 feet tall or less may qualify for the building permit exemption if also 200 sq ft or less.

Sources

Official links and freshness

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