As a native Texan and having grown up in Richardson, it's not unusual anymore to see many of the older homes with foundation repairs. Our clay soil is really crappy and the constant shifting and moving runs havoc on many foundations. Not to mention all the rock areas as well. I'm even seeing this on homes at 10 years of age as well.
I first look to see who did the repair, what type of adjustments were made, are they still around, how long have they been here, do they still warranty the work, etc.
My parents still live in Richardson in the same home and had foundation repair completed in 1970. In 1990 they came out and made adjustments. In 2001 they redid the type of lift system to make it even better and allow for less repeat adjustments. Since 2001, no shifting has occurred and the home is fine.
It's the reputation of the company that I look for and determine if my buyers would get good service is something in the future happened and the foundation piers needed adjusting again. There are just so many homes in the North Dallas area that have had foundation repairs that it does't seem as much as a red flag anymore.
Hope this helps!
Ebby Haliday Realtors
1415 Legacy Drive, Suite 100
Frisco, TX 75034