Harlovic and Perko is located in Dundee, Illinois, and serves clients in the northwest suburbs of Chicago and throughout Kane County, McHenry County, Cook County, and Dekalb County including the communities of Elgin, West Dundee, East Dundee, Crystal Lake, Sleepy Hollow, Carpentersville, Algonquin, Gilberts, Lake in the Hills, Hampshire, Pingree Grove, Hoffman Estates, and Barrington.