You most definitely need a permit and engineered drawings
A you're changing structure
B dont use any contractor who says you dont
C even the concrete needs to be of known strength or have a stronger deeper footing to handle the extra loads at the end
D you need either wood or steel beam AND a lintel. A lintel is literally a piece of angle attached to structure to then hold up your brickwork above the new door . Go hit he "ledge" above those two doors now ... its steel
Goodluck with this could be super cool when done ... correctly lol
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