Self-built houses in rural areas are wider than those built by neighbors. Is this good in feng shui?

The houses of the neighbors before and after you described are narrower than yours.

This is not a big problem in feng shui.

It doesn't matter

The good or bad luck of geomantic omen is comprehensively considered by the internal structure and external layout of the house.

It is not a simple condition that can determine the good or ill luck of residential feng shui.