Block foundation wildly out of square on 16’x18’addition.

First time I’ve seen a foundation this pit of square. Notquite sure what’s standard practice out in the real world.

I showed up this afternoon to put the mud sill down and movematerials from the front to the back in preps to start framingtomorrow. Pulled a tape on the diags of the block and discovered a2 1/4” difference .

The block is the right length on both sides measured along thelength from the house. The outside wall / parallel wall to existinghouse wall is straight when checked with a string.

The outside corners 16’ from the house are dead on 18’across the width. When I measure from one side to the other side,3’ out from the house, the dimension is 1.25” narrower. Ican’t measure next to the house because of a bay window.

Question is; should I follow the block with my plate and justdeal with it all the way up to the roof or hang the plate over theedge so I can get to square with the mud sill.

The roof on the addition will be an intersecting gable.

TLDR: block foundation woefully out of square. How toproceed.