Are these records indexed/available yet? Are the images up and browsable? Are there any aids?
One collection that includes some of what is now New York City:
I went there. A few general assignment records for 1900s but all the rest appears to still be 19th century.
There are at least indexes through 1917 in that group:
Yes, looked at those, thank you. They don't really seem relevant to the transfer and ownership of property that full land records capture.