Most of Hidden Hills was built recently: 0.0% of its homes predate 1940 and the median home dates from 1970. Below: 2 old photos and papers, maps from 1903 on, and the census since 1970.
On its age, its old homes and the National Register, Hidden Hills is among the newest of U.S. towns. Its National Register listings hold the grade up; its age pulls it down.
D−
HistoryA character grade: shown, never part of Hidden Hills’ overall grade.
Few California towns list much on the Register (a typical California town has 0.0 per 10,000 residents, the U.S. 2.4), so Hidden Hills’ 0.0 sits below most of its state (31% of California towns have fewer) while its 0 listings outnumber those of 23% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would still be D−. The pre-1940 share (±1.9 points) is firm at this size. Two sources give 1961.
Founding year: Wikidata (other dates in Quick answers). Homes: Census ACS 2020–24. National Register: National Park Service, May 2026 list; each listing counted once (boundary changes and added documentation belong to their listing), and a historic district counts its contributing buildings. How TownRatings grades history →
What stands out about Hidden Hills’ past
Read from the archive, the National Register and the record. The page puts what stands out first.
The community was designed and developed in the 1950s by A. E. Hanson, a Southern California landscape architect and planned community developer. His earlier projects included Rolling Hills and Palos Verdes Estates, and the 1920s Beverly Hills Harold Lloyd Estate "Greenacres".
Hidden Hills became the 73rd city in Los Angeles County on October 19, 1961.
[W]ith its absence of sidewalks and streetlights, copious "Horses & children at play" signage, and abundant 2-acre lots surrounded by white three-rail fences, Hidden Hills exudes a certain rough-around-the-edges charm.
Originally conceived of as a "rustic retreat" from LA, it is now described as the "glitzy epicenter of Nouveau Hollywood" and an "uber-elite enclave".
Nothing in the archives for these yearsWeddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
In 1961, according to Wikidata. the census of 1970 counted 1,529 people here.
How does Hidden Hills rank for history?
Hidden Hills is among the newest of U.S. towns. The History grade combines the town’s founding era, the share of homes built before 1940 and its National Register listings. It’s a character grade, so it isn’t part of the overall grade. How it works.
How old are the homes in Hidden Hills?
0.0% of Hidden Hills’ homes were built before 1940 (Census estimate, ±1.9 points), against a typical 3.4% for a California town; the median home was built in 1970.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021).
From Wikimedia Commons (5), Wikipedia, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia) and the USGS Geographic Names Information System. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.
Date?
c. 2018
2015
2015