Patio Cover Permits in Portland and Oregon: The 200 Square Foot Rule

Patio covers sit in a gray area for many owners. Oregon's residential code exempts small patio covers, and each city reads that exemption into its own rules. Portland's version is short: a patio or porch cover is exempt if it is not over 200 square feet and is supported by an exterior building wall.

Portland's rules

• Exempt: a patio or porch cover not over 200 square feet, supported by an exterior building wall.

• Permit required: adding or enlarging an open sided roofed structure attached to a house when it is greater than 200 square feet.

• Permit required: enclosing a patio cover, porch or carport.

• Always: zoning rules apply even when no building permit is needed.

How other Oregon cities read the exemption

Cities outside Portland apply the Oregon Residential Specialty Code exemption with their own handouts. Wilsonville, for example, exempts patio covers only when all conditions are met: not over 200 square feet and not used as a habitable room, a floor no more than 30 inches above grade, the covered portion at least 3 feet from any property line, one story and no more than 12 feet tall. Check the handout for the city or county where the site sits.

When a small cover still needs a permit

• It meets some but not all of the exemption conditions.

• The project changes the house, such as a new or enlarged door or window opening.

• An exit from the house opens under an enclosed patio.

• Electrical, plumbing or mechanical work, such as heaters or lights, needs trade permits even when the cover is exempt.

What the drawings show

• Site plan with property lines, setbacks and the cover's footprint.

• Framing plan with beams, posts, rafters and the ledger connection to the house.

• Footings and post bases.

• Loads, including the snow load for the site, which governs in many parts of Oregon.

Common questions

Do I need a permit for a patio cover in Portland?

Yes, if it is attached and greater than 200 square feet, or if you enclose it. A cover not over 200 square feet supported by an exterior building wall is exempt, but zoning still applies.

Can I enclose my patio cover without a permit?

No. Portland requires a building permit to enclose a patio cover, porch or carport.

Is a freestanding patio cover treated differently?

Exemption conditions vary by city. Many Oregon cities apply size, height and setback limits from the state residential code. Confirm with the local building department.

Do I need an engineer for a patio cover?

Often not for a small cover built to prescriptive framing. Larger spans, high snow loads or unusual connections can need structural design.

How SASHKOV handles it

• Confirms whether the cover is exempt or needs a permit in that city or county.

• Designs the framing and connections, with an engineer where the loads or spans need one.

• Prepares the site plan, framing plan and details for submittal.

• Submits the permit and tracks it through inspection to final.

Where a building requires a licensed architect or engineer of record, SASHKOV brings them into the contract.

Need patio cover drawings? See Permit and Construction Documents. For decks under the cover, read Deck Permits in Portland.

Planning a patio cover? Send the address, size and photos, and SASHKOV will confirm the permit path and timeline in business days.