Mesa is the only city in this metro that ties its window permit exemption to energy performance rather than to geometry alone. A replacement that fits the opening perfectly still falls outside the exemption if it downgrades the energy rating, which makes the spec sheet part of the permit question in Mesa rather than a separate conversation about comfort and bills. Ask for the rating of the outgoing window as well as the incoming one.
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Mesa's residential construction guide puts "replacing existing windows with equal or better energy rating and using the same size opening" on the no-permit list. Elsewhere the test is purely dimensional. Here a replacement that fits the opening perfectly still falls outside the exemption if it downgrades the energy rating.
On the permit side the guide lists "window replacements that require a larger opening or new header", and converting a window to a door. Sleeping rooms carry a clear opening of at least 5.7 square feet.
Mesa moved to the 2024 International Code Council family and the 2023 National Electrical Code, in effect for applications submitted on or after 8 January 2026. Guidance published before that date describes a superseded code.
Historic homes go through Planning approval separately.
Mesa applies two conditions where most cities apply one, so the energy rating matters here before the permit question is settled.
Not if two conditions are met. Mesa's residential construction guide exempts replacing existing windows with an equal or better energy rating using the same size opening. Elsewhere the test is purely dimensional. Here a window that fits perfectly still needs a permit if it downgrades the rating.
The guide lists window replacements requiring a larger opening or a new header, and converting a window to a door.
Sleeping rooms carry a clear opening of at least 5.7 square feet. A like-for-like swap can quietly fail this if the new frame eats into the clear opening.
The 2024 International Code Council family and the 2023 National Electrical Code, in effect for applications submitted on or after 8 January 2026. Guidance published before that date describes a superseded code.
Yes. They go through Planning approval separately from the building permit.