Between 1991 and 1999, pre-1950 structures in Johnson County were identified and surveyed by the Johnson County Museum. This survey was part of a larger project to document historic architectural resources in the state of Kansas, funded by a historic preservation survey grant from the National Park Service, United States Department of the Interior and administered by the Kansas Historic Preservation Department.

A survey of these resources contributes to understanding of the county's history and aids in planning to preserve historic structures. This survey includes residences, commercial buildings, barns, outbuildings and bridges. Volunteer surveyors recorded information about location of structures, their architectural style and form, construction materials and techniques. Each structure was photographed and all the information was entered into a database. A final report, analyzing the built environment in Johnson County, is currently being prepared. The full report will be available on this website when complete. From these surveys, significant structures are nominated for the Kansas and National Registers of Historic Places.

The following Johnson County properties are currently on the National Register of Historic Places:

> Blackfeather Farm, 8140 W. 183rd, Stilwell (1923)
> Ensor Farm, 18995 W. 183rd St., Olathe (1875-1930s)
> Gardner Lake Beach House, west side of Gardner Lake (1937-38)
> Horn-Vincent-Russell Estate, 6624 Wenonga Road, Mission Hills (1931)

> Lanesfield School, 18745 S. Dillie Road, Edgerton (1869, altered 1904)
>  Loomis District: Emily Loomis House, 8325 Johnson Drive (1886) Charles Loomis House, 5900 Hadley Avenue (1912); and Lloyd Griffith House, 5923 Hadley Avenue (1944)
> J.B. Mahaffie House, 1100 Kansas City Road, Olathe (1865)
> John McCarthy House, 19700 Sunflower Road, Edgerton (ca. 1860)
> Albert Ott House, 401 S. Harrison, Olathe (1894)
> Martin Van Buren Parker House, 631 W. Park, Olathe (1880)
> I.O. Pickering House, 507 W. Park, Olathe (1869)
> Redel District, 163rd & Mission Road, Overland Park (1905, 5 buildings)
> Rio Theater, 7204 W. 80th Street, Overland Park (1946)  
>Shawnee Methodist Mission, 3403 W. 53rd St., Fairway West Building (1839), East Building (1841), North Building (1845)
> Turner Barn, 19805 S. Moonlight Road, Gardner (1898)
> Herman and Ella Voigts House, 2405 W. 103rd Street, Leawood (1923)
> John S. Wolcott House, 5701 Oakwood, Mission Hills (1928)
> Virginia School, District #33, 71st St. and Clare Rd., Shawnee (1875)
 

The following properties are on the Register of Historic Kansas Places:

> Caenen Castle, 12407 Johnson Drive, Shawnee (1904-1907)
> Dutton-Thomas-Soule Farm (also known as the Palmberg farm), 7925 Sunflower Road, De Soto (1884)                                                               
> Edgerton Grange Hall, 404 E. Nelson, Edgerton (1904, altered1930s)
> William C. Harkey House, 224 E. Main, Gardner (1902)
> George Hodges House, 425 S. Harrison, Olathe (1892, altered 1921)
> Hycrest, 505 E. Cedar, Olathe (1881, altered 1919)
> Lackman-Thompson Farm, 11180 Lackman, Lenexa (1887)
> Frank Lanter House, 562 W. Park, Olathe (1901)
> Graham Rogers House, 6741 Mackey, Overland Park (c. 1845)
> Spring Hill Historic District, Main Street, Spring Hill (1887-1888, 1903-1905)
>

For more information about the historic site survey project contact jcmuseum@jocogov.org or call 913-715-2550.