Federal (ca. 1780 - 1830) - a formal, classical style of architecture, that is more a refinement of the Georgian style, than a clear departure from it.
- Symmetry is rigidly imposed, and classical ornament is more restrained, and the scale and execution of ornament is more delicate.
- Window frames are less bulky and muntins are more thin. Palladian windows and sidelights around doors are common. Window lights are larger, and tend to be used in multiples of three: nine over six, six over six (most common), or six over three.
- The cornices may be articulated with dentil or other decorative moldings, and porticoes are common. Applies ornamentation, such as garlands, swags, and cartouches may be used.
Georgian (ca. 1720 - 1790) - a formal, classical style with bold features and hierarchical arrangement of building elements.
- Front doors are often heavily accentuated with frontispieces, columns and pilasters and fanlights.
- Windows typically feature double-hung sashes with large muntins, and window lights tend to be smaller than those found on later buildings, sometimes with sixteen, twelve, or nine lights per sash.
- In addition to the size of the building, the expense of construction is indicated in the size of the windows, the number of window lights, the extent of ornament, and even the size of the cornice.
Greek-Revival (ca. 1815 - 1860) - a formal, classical style of architecture that tends to take a more literal approach to achieving classical forms and detailing, seeking to achieve a more temple-like form.
- Columns and pilasters are common either at the portico or supporting building's primary cornice.
- The roof becomes less prominent as the cornice and pediment becomes more so. Palladian elements are absent, and ornament is more specifically Greek, rather than Roman in origin.