The Growth of Los Angeles County

 I don’t know who to give credit for this as there does not appear to be an “About” page, but here is a web site where you can watch a video of the growth of Los Angeles County since 1880.

The full video includes a small amount of text describing the county’s growth. The page allows you to pick from several specific areas, pan and zoom around or enter an address. Remember Pasadena in 1982? Here is part of it.

Here is the entire county in 2026.

You can color code the buildings by decade or by height, though since they are also shown in 3D the height option seems a bit redundant.

Hovering over any block will get you some stats.

Here is a video where you can see the downtown area growing upwards over a few decades.