Every style the index knows, as a tree: a family counts every style beneath it. Each has a page with its definition and period; a style is ranked once at least one city has five listings in it, and until then its page lists the cities that have some. Periods are the typical United States range.
- Colonial 1600–1780 49 cities ranked
- Georgian 1700–1780 33 cities ranked
- Dutch Colonial 1625–1840 1 city ranked
- French Colonial 1700–1830 no city has 5 yet; 8 have some
- Spanish Colonial 1600–1850 no city has 5 yet; 13 have some
- Postmedieval English 1600–1700 no city has 5 yet; 14 have some
- Early Republic 1780–1830 72 cities ranked
- Federal 1780–1820 66 cities ranked
- Early Classical Revival 1770–1830 no city has 5 yet; 12 have some
- Mid-19th Century 1830–1870 269 cities ranked
- Greek Revival 1825–1860 149 cities ranked
- Gothic Revival 1840–1880 63 cities ranked
- Carpenter Gothic 1840–1880 no city has 5 yet; 32 have some
- Italian Villa 1840–1870 1 city ranked
- Octagon Mode 1850–1870 no city has 5 yet; 35 have some
- Exotic Revival 1835–1890 3 cities ranked
- Egyptian Revival 1830–1860 no city has 5 yet; 25 have some
- Moorish Revival 1850–1900 1 city ranked
- Early Romanesque Revival 1840–1860 no city has 5 yet; 10 have some
- Late Victorian 1860–1900 654 cities ranked
- Italianate 1840–1885 166 cities ranked
- Second Empire 1855–1885 28 cities ranked
- Stick/Eastlake 1860–1890 18 cities ranked
- Queen Anne 1880–1910 171 cities ranked
- Free Classic 1890–1910 no city has 5 yet; 18 have some
- Folk Victorian 1870–1910 no city has 5 yet; 5 have some
- Shingle Style 1880–1900 8 cities ranked
- Romanesque Revival 1840–1900 98 cities ranked
- Richardsonian Romanesque 1880–1900 2 cities ranked
- High Victorian Gothic 1860–1890 32 cities ranked
- Renaissance Revival (Victorian) 1840–1890 83 cities ranked
- Late 19th and 20th Century Revivals 1880–1955 623 cities ranked
- Colonial Revival 1880–1955 179 cities ranked
- Dutch Colonial Revival 1895–1930 no city has 5 yet; 35 have some
- Georgian Revival 1895–1955 2 cities ranked
- Cape Cod Revival 1920–1955 no city has 5 yet; 4 have some
- Classical Revival 1895–1950 189 cities ranked
- Beaux-Arts 1885–1930 35 cities ranked
- Italian Renaissance Revival 1890–1935 2 cities ranked
- Late Gothic Revival 1900–1940 31 cities ranked
- Collegiate Gothic 1890–1940 no city has 5 yet; 34 have some
- Tudor Revival 1890–1940 58 cities ranked
- Spanish and Mediterranean Revivals 1890–1940 73 cities ranked
- Mission Revival 1890–1920 59 cities ranked
- Spanish Colonial Revival 1915–1940 11 cities ranked
- Mediterranean Revival 1915–1940 7 cities ranked
- Monterey 1925–1955 no city has 5 yet; 3 have some
- Pueblo Revival 1910–1990 6 cities ranked
- Chateauesque 1880–1910 no city has 5 yet; 19 have some
- Byzantine Revival 1890–1930 1 city ranked
- Art Nouveau 1890–1915 1 city ranked
- French Eclectic 1915–1945 no city has 5 yet; 8 have some
- Colonial Revival 1880–1955 179 cities ranked
- Late 19th and Early 20th Century American Movements 1880–1930 242 cities ranked
- Arts and Crafts 1890–1930 152 cities ranked
- Craftsman 1905–1930 116 cities ranked
- Prairie School 1900–1920 26 cities ranked
- American Foursquare 1895–1930 4 cities ranked
- Chicago School 1880–1910 67 cities ranked
- Commercial Style 1880–1930 35 cities ranked
- Skyscraper 1885–1930 6 cities ranked
- Sullivanesque 1890–1920 no city has 5 yet; 4 have some
- Arts and Crafts 1890–1930 152 cities ranked
- Modern Movement 1920–2000 130 cities ranked
- Art Deco 1920–1940 47 cities ranked
- Moderne 1930–1950 32 cities ranked
- Streamline Moderne 1930–1945 no city has 5 yet; 72 have some
- PWA Moderne 1933–1944 1 city ranked
- International Style 1925–1975 20 cities ranked
- Minimal Traditional 1935–1950 1 city ranked
- Usonian 1936–1959 no city has 5 yet; 30 have some
- Mid-Century Modern 1945–1975 4 cities ranked
- Contemporary 1945–1990 no city has 5 yet; 13 have some
- Ranch 1935–1975 3 cities ranked
- Split-Level 1955–1975 no city has 5 yet; 3 have some
- Googie 1945–1972 no city has 5 yet; 3 have some
- New Formalism 1955–1975 no city has 5 yet; 15 have some
- Brutalism 1950–1980 no city has 5 yet; 14 have some
- Expressionist Modern 1950–1975 no city has 5 yet; 5 have some
- Shed 1960–1985 no ranked city has one yet
- Postmodern 1965–1995 no city has 5 yet; 8 have some
- Other 2 cities ranked
- Vernacular 2 cities ranked
- I-House 1800–1900 no city has 5 yet; 10 have some
- Hall-and-Parlor 1700–1900 no city has 5 yet; 6 have some
- Gabled Ell 1850–1910 no city has 5 yet; 11 have some
- Shotgun 1860–1930 no city has 5 yet; 3 have some
- Log 1700–1900 no city has 5 yet; 1 has some
- National Park Service Rustic 1916–1942 no city has 5 yet; 69 have some
- Vernacular 2 cities ranked