u/IncidentDesperate605

I am building a house, but I have a problem. My corners have different lengths and heights. Because of this, the building looks messy. Does anyone know how to fix this?

https://preview.redd.it/okw8z1bykkzg1.png?width=1399&format=png&auto=webp&s=1ae898783f289645d2437aafa820de35c932ca25