I have seen this many times in western Delaware County & Chester County. Entire Toll Bros developments with bad stucco. Its incredible. You drive through the 10-year-old development and most houses are surrounded by scaffold. Just when you thought all the homes have been repaired, there is a new crop that seem to spring up. Friends of mine are dealing with this as we speak. They switched to siding instead of new stucco. When I have appraised these things, I have received estimated from agents dealing with comps with the same stucco issue and made dollar-for-dollar adjustments for 100's of thousands in some cases. In all cases in these developments I call for a stucco inspection. I am not sure there will be any increase in value to make the home whole and in-line with what a buyer expects when making a purchase in the area. I am not sure the typical buyer would be willing to pay a premium for new stucco as opposed to a home with older stucco that has been inspected and deemed proper. I always tell buyers to proceed with extreme caution with stucco homes. I'm not sure I would buy one.
Another note, let's say there was an increase in value due to newer stucco. Unless the home is being sold very soon, my thought is that after a certain period of time the newer stucco would lose it's impact on overall value anyway. This is assuming we are dealing with a home that is less than 15-years old. My entire post assumes the property is less than 15-years old.