Being a homeowner in the Northern Virginia area we forgot how much real estate property taxes we are paying since most of us have escrows setup with our monthly mortgage payment. For few who are fortunate to have no mortgage or lender allows you to pay your own tax bill you will need to stick a reminder to pay the bill on time to avoid penalties or worst case lien on your home.
Here are the real estate tax rates around the Northern Virginia area of the City of Falls Church, Fairfax County, Arlington, Alexandria, Town of Herndon, City of Fairfax, Loudoun and Prince William County. 

New Construction real estate tax assessment:  

If you are purchasing a new construction home most of the counties & cities will send out a supplement bill that will show the adjustment of the tax due. Speak with your closing agent on what to do if you receive a supplemental insurance bill. 

Sources:

City of Alexandria, Arlington County, City of Falls Church, Fairfax County, City of Fairfax, Town of Herndon, Loudoun County,  and Prince William County.

Consult your tax advisor or respective counties if you have any questions regarding your tax rate or bill.