We maintain yearly records on over 550 thousand parcels. Find property records, real estate tax assessment information, and more about properties and real estate in Allegheny County.Use the map below to hover over each state to see deadlines and click for more details. If you want to share your opinions concerning the proposed pipeline in the form of a letter to the editor, the following information might be helpful. Payments are to be mailed to the address on the tax notice which is P.O. Box 49, South Park, PA 15129. Meeting of the Allegheny County Board of Health September 6, 2023 1. Local Philadelphia Property Tax Expertise with a National Footprint. Will assist with the preparation of state personal income or property tax forms.