National Register of Historic Places architectural style categories

In the United States, the National Register of Historic Places classifies its listings by various types of architecture. Listed properties often are given one or more of 40 standard architectural style classifications that appear in the National Register Information System (NRIS) database. Other properties are given a custom architectural description with "vernacular" or other qualifiers, and others have no style classification. Many National Register-listed properties do not fit into the several categories listed here, or they fit into more specialized subcategories.

The complete list of the 40 architectural style codes in the National Register Information System—NRIS follows:
Obs — ARSTYLCD — ARSTYL

Some selected National Register Information System (NRIS) styles, with examples, include:

Federal architecture was the classicizing architecture style built in the newly founded United States between c. 1780 and 1830. Examples include: the Old Town Hall in Massachusetts, and Plumb House in Virginia.

Greek Revival architecture is a Neoclassical movement of the late 18th and early 19th centuries in Europe. It emerged in the U.S. following the War of 1812 and while a revolutionary war in Greece attracted America's interest. Greek Revival architecture was popularized by Minard Lafever's pattern books: The Young Builders' General Instructor in 1829, the Modern Builders' Guide in 1833, The Beauties of Modern Architecture in 1835, and The Architectural Instructor in 1850.

Greek Revival in the U.S. includes vernacular versions such as the 1839 Simsbury Townhouse built by an unknown craftsman and the Dicksonia Plantation, and high-style versions such as the Second Bank of the United States, Philadelphia.

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