Here is my issue.

I’ve played with the UV in Blender but no matter of tweaking seems to be able to fix this. The materials have exactly the same settings and texture. The texture tiles fine over walls. Adjusting the offset does not seem to fix it either. For the life of me I cannot get the texture to tile correctly between objects. The only difference in these models is the door way. Is there a way to fix this in Unity?
Whatever you did to the UVs you didn’t do it right.
There is a workaround in Unity which is to create a duplicate material for the doorway section and adjust the offset of that one separately. But that’s wasteful, you really just need to fix the UV mapping in Blender.
Substitute a texture map that is a grid of colors and numbers for the grey siding, that will make it a lot easier to match up correctly, then swap the original texture back in when you get it right.