Whitehall Township borders Allentown to the north, and many of its homes have full basements that owners have finished into living space. Water in a finished basement is a bigger problem than in an unfinished one, because it hides behind drywall and carpet until it smells or stains.
If you suspect a leak behind a finished wall, the contractor may need to open a small section to see the foundation before quoting. That is normal, and a good company will tell you what it will cut and how it will be patched. Interior drainage can often be installed along the edges of a finished room with the walls rebuilt afterward. Mention any past flooding, insurance claims or previous waterproofing work in your request, since it helps the company quote accurately the first time.