Baltimore County maintains extensive on-line information at their web site at: BaltimoreCountyMD.gov. However, they have a nasty habit of removing important information after a year or two, as if no one is still interested. I have been downloading much of this information since 2009, so have an almost complete collection. It is being posted here, linked under the various agencies and Boards and Commissions.
Updated 7 Feb 2019 by MAP