Pinal County has been in a housing boom for a while, driven by several factors. The major one is people moving to the area. The need in Casa Grande has accelerated with rapid hiring at Lucid Motors, as people from outside Pinal help fill available jobs.
Subdivisions that had been dormant or partially so since the early-2000s boom have all come to life. Most of these have infrastructure, and developers snapped up available lots.
Another driver is the fact that those subdivisions have assured water certificates from the state, which now are harder to come by. A new state law, Senate Bill 1274, allows more homes under certificates if efficiency does not increase the overall water demand. That fits with higher density and also newer building design. Casa Grande is responding with allowing that in some areas, especially with the newer concept of build-to-rent, which also seems to work well for some people coming to the area. The city is also requiring considerable open space.
These changes are beneficial to the community, especially given the jump in jobs. The employment increase is something that was long sought here, but in the past it came more gradually.