The Case Study Houses have finally made the National Register of Historic Places (well, 11 of them have). The modest, modern, houses--built through an Arts & Architecture magazine program launched in 1945--helped establish Los Angeles as the American center of mid-century modern architecture (participants included Richard Neutra, Charles Eames, Pierre Koenig) and of mid-century futurist living (they were meant to be easily replicable, made with "new materials and new techniques in house construction," and were of course car-centric and single-family). The newly-landmarked include Pierre Koenig's Stahl House (aka CSH #22), which might just be the most famous house in Los Angeles, thanks to a photograph by Julius Shulman, along with the Entenza House in Pacific Palisades and Koenig's CSH #21 in the Hills. Here's a map guide to all the extant CSHes in the greater Los Angeles area.

The LA Conservancy's Modern Committee spent nearly a decade trying to get some of the CSHes recognized and last month the National Park Service officially listed 10 of the houses (see below); an eleventh "was determined eligible for listing but not formally listed due to owner objection," according to the Conservancy. And about time: "Few of the homes have actual protections against demolition or excessive alteration. Since the nomination process began eight years ago, Case Study House #16 designed by Rodney Walker has been completely demolished, and two others have been altered to the extent that they no longer meet the requirements for designation." Here's the full list of newly-protected houses (Some of the CSHes, including the Eames House in Pacific Palisades, were left off this landmarking because they're listed individually.):

Los Angeles County:

-- Case Study House #1, 10152 Toluca Lake Ave., Los Angeles

-- Case Study House #9, 205 Chautauqua Blvd., Los Angeles

-- Case Study House #10, 711 S. San Rafael Ave., Pasadena

-- Case Study House #16, 1811 Bel Air Rd., Los Angeles

-- Case Study House #18, 199 Chautauqua Blvd., Los Angeles

-- Case Study House #20, 2275 N. Santa Rosa Ave., Altadena

-- Case Study House #21, 9038 Wonderland Park Ave., Los Angeles

-- Case Study House #22, 1635 Woods Dr., Los Angeles

San Diego County

-- Case Study House #23A, 2342 Rue de Anne, La Jolla, San Diego (determined eligible but not officially listed)

-- Case Study House #23C, 2339 Rue de Anne, La Jolla, San Diego

Ventury County

-- Case Study House #28, 91 Inverness Rd., Thousand Oaks

The Conservancy has a lot more information on all the houses.

· Case Study Houses [LA Conservancy]

· The Case Study House Map of Los Angeles [Curbed LA]