This style is predominantly found in the Midwest, South, New England, and Midatlantic regions, though you may spot subtypes in parts of California. Its popularity in the 1800s stemmed from archeological findings of the time, indicating that the Grecians had spawned Roman culture. American architects also favored the style for political reasons: the War of 1812 cast England in an unfavorable light; and public sentiment favored the Greeks in their war for independence in the 1820s.
Identify the style by its entry, full-height, or full-building width porches, entryway columns sized in scale to the porch type, and a front door surrounded by narrow rectangular windows. Roofs are generally gabled or hipped. Roof cornices sport a wide trim. The front-gable found in one subtype became a common feature in Midwestern and Northeastern residential architecture well into the 20th century. The townhouse variation is made up of narrow, urban homes that don't always feature porches. Look for townhouses in Boston, Galveston, Texas., Mobile, Ala., New York, Philadelphia, Richmond, Va., and Savannah, Ga.