Window Replacement Portland: $3,422 to $13,466 + Permits

Portland rows are local figures from Angi; the national row is labeled.

Do you need a permit to replace windows in Portland?

No, not for a straight swap: Portland Permitting and Development lists replacing doors or windows as residential work that needs no building permit when the existing openings are not widened or reduced. Cutting a new opening, widening one or shrinking one needs a permit, and zoning rules still apply either way. Angi puts that permit at $145 to $380, depending on the project's valuation. Questions go to General Inquiries at 503-823-7300.

Codes are changing this year. The Oregon Building Codes Division adopted the 2026 Oregon Residential Specialty Code on October 1, 2026, and Portland says residential permit requests must follow it from April 1, 2027, after a six-month phase-in that ends March 31, 2027. If your job needs a permit, ask the installer which code edition it is applying under.

Lead paint: 63% of Portland homes were built before 1980

Most Portland housing is old enough for the lead rule: the Census Bureau puts the median year built at 1966 and counts 195,145 of 307,719 units (63.4%) built before 1980. The EPA's Renovation, Repair and Painting rule says anyone paid to disturb paint in a home built before 1978 must be lead-safe certified, and the rule's minor repair exemption does not cover window replacement. The EPA estimates that about three-quarters of U.S. homes built before 1978 still contain some lead-based paint. Ask for the firm's lead-safe certificate up front.

Portland's damp winters and what to ask for in a window

Portland is a heating climate: Portland International averages 31.7 nights a year at or below 32 F and 14.6 days at or above 90 F in NOAA's 1991 to 2020 normals. Angi says Pacific Northwest rain makes moisture-resistant frames worth asking about. ENERGY STAR says certified windows cut energy bills by an average of up to 13% when they replace single-pane windows, and it tells buyers to match the ENERGY STAR label for their climate zone next to the NFRC label. The federal window tax credit ended for anything placed in service after 2025 (IRS). Frame and style prices nationally: window replacement cost.

Is there an Energy Trust rebate for windows in Portland?

Not on Energy Trust's current page: its window incentive of $10 per square foot, for windows rated U-0.30 or lower, is listed only for SW Washington customers of NW Natural who heat with a gas furnace and are replacing single or double pane metal windows. Applications are due within 60 days of installation. Portland homeowners should ask an installer about any manufacturer promotions instead, and check Energy Trust again before ordering, since programs change.

How to hire a window installer in Portland

Every contractor working in Oregon needs a Construction Contractors Board license, the state Building Codes Division says, and you can search the CCB online by name or number. Ask each bidder: insert or full-frame replacement, the U-factor on each NFRC label, whether the opening changes (and so whether a permit is needed), its EPA lead-safe certificate for a pre-1978 house, and proof of insurance. Calls go to an independent company that serves your area and takes this kind of job (how calls work).

Rules, programs and conditions for window work in Portland, from official city, state, Census and NOAA pages unless marked.

More Portland home repair guides

Heating: furnace repair in Portland and HVAC repair in Portland. Roofs: roof repair in Portland. Damp and leaks: mold removal in Portland and plumber in Portland. Compare window replacement in Seattle and window replacement in Salt Lake City. Insulation: attic insulation cost. All prices: home repair costs.