There are some unflattering opinions on Zillow, but at the risk of invokinr ire, I’d like to mention one of my data sources. Zillow has a chart that depicts historical home values (short and longer term) by zip, city, county, etc. I’m somewhat less skeptical of zip/city values than individual “Zestimates”, however the trend is clearly down. I haven’t found out exactly what the data is comprised of, weighting used, SFR/multi-family contribution, or whether the data is actual sales or a composition of “Zestimates”. It would be more convincing if the basis were actual sales and not “Zestimates”, but the trends seem to model current data from other sources. Also, it’s probably a couple months out of date, by the time it makes the charts.