{"nrhp_refnum":"09000802","name":"Stevens House","other_names":[],"category":"building","location":{"address":"23524 Malibu Colony Rd.","address_restricted":false,"city":"Malibu","county":"Los Angeles County","state":"CA","lat":34.03181332200006,"lon":-118.68700141699998,"geom_source":"nps_gis"},"listed_date":"2009-10-09","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A single-family beach house at 23524 Malibu Colony Road in Malibu, California, designed by architect John Lautner and built in 1968 on a narrow oceanfront lot.","why_significant":"The house is presented as a significant work of John Lautner, one of Southern California's most important twentieth-century architects. Its design solved the problem of a very narrow lot with two offset half-catenary concrete shells that echo ocean waves and fit five bedrooms, a studio and a pool. The form shows his approach of linking people, buildings and the surrounding environment.","narrative":"This oceanfront house in the gated Malibu Colony was designed by architect John Lautner and completed in 1968. It occupies nearly the full width of a lot only 37.5 feet wide and 110 feet long, with the front facing the mountains and the back facing the sea. Reinforced board-formed concrete makes up the structure, and the roof consists of two offset half-catenary concrete shells that Lautner said \"goes with the waves.\" Inside, five levels hold five bedrooms, five bathrooms, a painting studio, a playroom and a lap pool tucked beneath the curved roof. Large glass walls give views to both ocean and mountains. Lautner also designed details such as doorknobs, built-in furniture and cabinetry. Later changes, including a basement exercise room and a terraced rear deck, were mostly kept to secondary spaces. The house is recognized as a work by one of Southern California's most important twentieth-century architects, and as an inventive answer to a difficult narrow site.","period_of_significance":null,"architect_builder":"John Lautner (architect)","architectural_style":"Modern Movement","criteria":[],"status_note":"Still in use as a single-family dwelling; alterations are described as limited to secondary spaces with little impact on integrity.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:29.777763-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/09000802.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123859548","wikipedia":null,"wikidata":"https://www.wikidata.org/wiki/Q123419325"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/los-angeles-county/stevens-house-09000802/"}