Hi J.! There are several brand new communities near Mather, the city is called Rancho Cordova. Anatolia (new housing area) is only a couple of years old, and I know several new families who live there. However, you still have to drive a bit to get to any stores, as the neighborhood stores have not been built yet. YOu might also like to look at the 'village' on Data/International Drive. I cannot remember the name of it, but it was designed as a small community, wallking distance to some stores, some that are already open. If you're looking more for apartments, there are several apartment complexes right around the corner from Mather, also on Data Drive (I believe Mather also has housing on the base)
As for pre-schools I won't be able to help much, as my step-kid's schools are decided entirely by their monthers... But Mather Field is actually in the Rancho Cordova area, if that helps any...