| Holiday Inn | Laurel | MD |
| Holland Thompson | Baltimore | MD |
| Hollins-Payson Branch Enoch | Baltimore | MD |
| Holly Hall Apartments | Silver Spring | MD |
| Holy Cross Hospital | Silver Spring | MD |
| Holy Rosary Church | Baltimore | MD |
| Home For Aged | Baltimore | MD |
| Hong Qi 147 | Baltimore | MD |
| Hood College | Frederick | MD |
| Hooker Chemical | Perryville | MD |
| Horace Gray | Baltimore | MD |
| Hotel Belvidere | Baltimore | MD |
| Howard A. Kelly | Baltimore | MD |
| Howard County General Hospital | Columbia | MD |
| Howard Senior High School | Baltimore | MD |
| Howard Victory | Baltimore | MD |
| H&S Bakery | Baltimore | MD |
| Hughes & Rigby Engineering | Baltimore | MD |
| Humble Oil & Refinery | Baltimore | MD |
| Hutzler's | Catonsville | MD |
| Hutzler's | Towson | MD |
| Hw Wagner Station | Baltimore | MD |
| I.B.E.W. Building | Baltimore | MD |
| IBM | Gaithersburg | MD |
| IBM | Bethesda | MD |
| Immanuel Lutheran Church | Baltimore | MD |
| Insley | Clinton | MD |
| Insulation Contractors | Seat Pleasant | MD |
| Investment Building | Towson | MD |
| Israel J Merritt | Baltimore | MD |
| Istros 11 | Baltimore | MD |
| Iverson Mall | Marlow Heights | MD |
| Iverson Towers Apartments | Temple Hills | MD |
| Jacob H Schiff | Baltimore | MD |
| Janet Lord Roper | Baltimore | MD |
| Jason High School | Salisbury | MD |
| JCPenney | Eastpoint | MD |
| Jefferson Building | Towson | MD |
| Jemcor Realty | Baltimore | MD |
| Jersey May | Baltimore | MD |
| Jessup & Moore | Providence | MD |
| Jewish Medical Center | Baltimore | MD |
| J.F. Ford Fords Grand Opera House | Baltimore | MD |
| J.H.H. Hospital, Admin Building | Baltimore | MD |
| J.H.U. College | Baltimore | MD |
| J. N. Hagan Ice Cream | Grantsville | MD |
| John Bannard | Baltimore | MD |
| John Dushane & Company | Baltimore | MD |
| John Gallup | Baltimore | MD |
| John H. Hatton | Baltimore | MD |
