Frederick County, HFH of 2 East Church St 3rd Fl Frederick, MD 21701 Phone: (301) 698-2449 Web site | Email Our blitz: As part of Home Builders Blitz 2008, Habitat for Humanity of Frederick County and their building partners are building one home during the week of May 31 – June 7. This is the second Home Builders Blitz event in Frederick.