jtrotta,
Three Mile Island. After the leak, property values declined. It was measurable. But, interestingly, and not many remember this, those values recovered very quickly- to the extent that the prevailing values only 3 years afterward had caught up with the rest of the market.
There are a lot of misconceptions out there. Our job is to deal with the facts. If you can measure the impact, then by all means adjust for it. If not, do not stick your neck out. You simply tell the client about the proximity, that it does not appear to be measurable (if that is true) and get on with life.
Another misconception is the proximity of public housing. Many automaticlly assume it has a negative impact on surrounding SFRs. But Mike Marous, MAI in Park Ridge, IL did an academic study on this some 5-7 years ago. His data indicated absolutely no impact.
Now neither of these are necessarily universal. It may not be the case in each micro market. But absent any proof of negative impact, I'd shy away from anything more than reporting what is in the market area and be done with it.
Both articles/studies were published by the AI .
Brad Ellis, IFA, RAA