The construction of a water well consists of several elements. Placement of the well is very important.
Local codes require certain distances from septic and sand mounds, property lines, etc.
Another consideration would be general sloping of the lot and access to the well for future servicing. The actual hole for most domestic wells is a diameter of 6 inches. Drilling a well requires the use of special equipment that requires considerable skill. All wells require casing to protect the well from possible contaminants at or near the ground surface. Casing may not be needed for the full depth of the well in solid rock.