RANKING · 2024 ACS · 58 SHOWN OF 58

Oldest housing stock, California counties

California counties ranked by oldest median year of construction (2024 ACS). This list covers the 58 counties in California that qualify, ranked against each other statewide. The median across all 58 is 1981. Biggest climber in the top 100 since 2020: Nevada County, CA, up 9 places to #41.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDMost expensive homes Cheapest homes Highest median rent Lowest median rent Highest homeownership rate Highest renter share

YEAR1990 2010 2020 2024

RANKPLACESTATEPOPMEDIAN YEAR BUILTVS 1990

01San Francisco County, CACA826,07919460%

02Los Angeles County, CACA9,694,93419650%

03San Mateo County, CACA743,56819660%

04Marin County, CACA253,69419670%

05Alameda County, CACA1,636,63019690%

06▲7Sierra County, CACA3,09819710%

07▼1Humboldt County, CACA131,6471973+1%

08Santa Cruz County, CACA258,85219740%

09Santa Barbara County, CACA442,06519740%

10▼3Inyo County, CACA18,15819750%

11▲1Santa Clara County, CACA1,914,39119750%

12▼2Modoc County, CACA8,4261976+1%

13▼2Monterey County, CACA433,72919760%

14Napa County, CACA132,9491976+1%

15▲4Siskiyou County, CACA42,01319760%

16Glenn County, CACA28,1411977+1%

17▲5Lassen County, CACA28,11719770%

18▼1Mendocino County, CACA88,12219770%

19▼1Orange County, CACA3,149,50719770%

20▲4Trinity County, CACA15,72019770%

21▼6Colusa County, CACA21,8361978+1%

22▼1Contra Costa County, CACA1,170,07019780%

23▼3Ventura County, CACA830,85119780%

24▼1Sonoma County, CACA486,44419790%

25▲6Lake County, CACA67,77219800%

26▲6Mono County, CACA12,50519800%

27▲1San Diego County, CACA3,282,24819800%

28▲1Tuolumne County, CACA53,16019800%

29▲8Alpine County, CACA1,04319810%

30▼5Butte County, CACA209,2111981+1%

31▼1Del Norte County, CACA26,41019810%

32▲1Plumas County, CACA18,58319810%

33▼6Sacramento County, CACA1,618,4601981+1%

34Stanislaus County, CACA557,71919810%

35▲1Tehama County, CACA64,6651981+1%

36▼10Fresno County, CACA1,035,4561982+1%

37▲2Shasta County, CACA181,64819820%

38▲2Solano County, CACA455,37619820%

39▼4Sutter County, CACA98,7871982+1%

40▲8El Dorado County, CACA192,32319830%

41▲9Nevada County, CACA101,91119830%

42▲2San Luis Obispo County, CACA282,36719830%

43▲2San Bernardino County, CACA2,224,09119830%

44▼3Tulare County, CACA485,1461983+1%

45▲1Yolo County, CACA224,4101983+1%

46▼4Amador County, CACA41,8761984+1%

47▲2Kern County, CACA927,0681984+1%

48▼5San Joaquin County, CACA823,8151984+1%

49▲5Calaveras County, CACA46,60519860%

50▲1Kings County, CACA154,3271986+1%

51▲1Mariposa County, CACA16,9181986+1%

52▼14Merced County, CACA297,2601986+1%

53▼6Yuba County, CACA88,6911986+1%

54▲2Imperial County, CACA181,4111988+1%

55Madera County, CACA167,9271988+1%

56▼3San Benito County, CACA70,0821989+1%

57Riverside County, CACA2,544,9161990+1%

58Placer County, CACA442,0811994+1%

SHOWING 1–58 OF 58

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES