The most difinitive information will be had from the office of the Recorder of Deeds for your county.
Some municipalities have it on line for most however you need to go in person to examine the records.
Fran and Mark Redding
Prudential Fox & Roach, Realtors
1010 stonyhill Road
Yardley, PA 19067
There are several local & national websites (Zillow, Trlia, etc) that can provide you with basic info pertaining to this matter. Additionally, Realtors have access to the MLS & public records which contain more detailed information. If you have any further questions feel free to contact me via email: firstname.lastname@example.org.