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December 1, 2016
We have good news and bad news here:
A permit is required if changing a flat window to a Bay Window or a Bow Window, even if the rough opening size is not changed. This is because the weight of the bay or bow window is cantilevered out from the home and creates special structural considerations to properly carry that load.
A Building Permit is required for enlarging any doors or Windows where a header needs to be added or altered. This includes brand new windows where there is no window now.
If the new proposed header will be over 8' wide then typically the City of Calgary will request an Engineer review the project and create stamped drawings showing the structural framing required to support all loads. This can be costly up front, but not nearly as costly as experiencing structural damage to your home later because the proper due diligence was not taken up front.
In order to obtain a permit the City will require the following information:
A more costly and longer process is involved if dramatically changing the appearance of your home, especially the front elevation. This would require obtaining a Development Permit in addition to the Building Permit and can add months and thousands of dollars to your project, so carefully consider thsee factors before planning dramatic renovations.
Other Building Code considerations that are looked for during the permit process include:
Our Team (including our the Independent Permit Expert we rely on) is fully trained in the requirements for Permits to ensure your Window or Door Enlargement Project is done safely, correctly, and legally.