Home Repair Decoded

Do I Need a Permit to Replace Windows?

Short answerIt depends on where you live and on the opening. Replacing a window in the same size opening often needs no permit, as in Portland, Oregon, but Bedford, Texas and Mukilteo, Washington require one. Cutting a new opening or resizing one commonly requires a permit. Confirm with your local building department before ordering windows.

What this costs

Our national estimates, not quotes.
OptionJobLowHigh
ReplaceWindow Replacement (per window)$370$1,300

Local examples show the range

These are examples only, and rules change.

What can change the answer

A bedroom window may also be an emergency exit. The 2015 International Residential Code, as published by Springville, Utah, says ordinary repairs don't include changing a required means of egress. Portland says historic and design overlay zones can add review of exterior work, and it exempts storm windows from a building permit.

What to ask

Call or check the website of your city or county building department before you start, and give them your address and a short description of the job.

Why it's worth asking first

Portland, Oregon's 2022 permit guide says inspections catch problems early, that buyers, realtors or lenders may require unpermitted work to be corrected before closing, and that a lack of permits and inspection approvals may void insurance. Even where no permit is needed, the work generally still has to meet code and zoning rules.

Permit offices in major cities

Common questions

Do I need a permit to add a new window?
Usually. Portland, Falls Church and Louisville all treat a new or enlarged opening differently from a same-size swap, and cutting into a wall can involve structure.
Do I need a permit for storm windows?
Portland lists installing storm windows among work that doesn't need a building permit. Check your local rule, especially in a historic district.

Related questions

Last verified 2026-11-03

Sources

General information, not professional advice. Conditions, codes and prices vary. Turn off power, gas or water before any work, and hire a licensed professional when in doubt. Cost figures are our estimates, not quotes.