Legal Question in Real Estate Law in Pennsylvania

If the proceedings were held in NJ then that is where you need to seek to enforce the judgment. Does the landlord own other property in NJ? Work in NJ? If so, then you can garnish his wages or execute on other property (like bank accounts). See a NJ collection attorney about that.

If the landlord owns no property in NJ, has no bank accounts in NJ and does not work in NJ, then you do need to find out where the landlord does own property, have a bank account or work and transfer the judgment to that place. If he works in PA, there is no wage garnishment there, but if he works in NY for example, then there is wage garnishment so you might want to transfer there. If all he owns is real property in PA, you can transfer the judgment to PA, and the judgment will be a lien on the property.