All of our lots were laid out by the developer with 1” rebar ‘pins’ at all corners. Those pins were marked with wooden stakes with lot numbers painted on them. I doubt the pins have rusted away but it might take metal detector to locate them now. Some of the original Wooden stakes are still around. I can find 3 of my 5 original pins and the two I am searching for should be where I know them to be. You will need the surveyor for property issues but just deciding where to rake the old pins should be available.