Can a new neighbor expand his driveway onto a side-yard that has been maintained for over 23 years by the owner of the house next door for 23 years claiming a survey says it is his la?

Whether the new neighbor can expand their driveway onto the side yard depends on several factors, including local property laws, zoning regulations, and any existing easements. If the area has been maintained by the neighbor for 23 years, it may suggest a potential claim of adverse possession, but this typically requires continuous and exclusive use without permission. It's crucial for both parties to consult a property attorney to understand their rights and obligations based on the specific circumstances and local laws.