OK. All 'new' assessment values for City of Pittsburgh commerical parcels are in a comma delimited file online here. Just two fields, Block and lot number (one field) and the 2012 assessment. Scraped with this program if you are interested.
So the top 10 new commercial valuations in the city that I come up with are....
500 Grant St. $242 million
Rivers Casino $242 million
1 PPG Place $238 million
600 Grant St. (aka Steel Tower) $233 Million
301 Grant St. $167 million
1001 Liberty $149 million
500 Ross St. $102 million
210 6th St. $98 million
401 Liberty $93 million
625 Liberty $92 million
So yes, I am sure they will all appeal and some may be overassessed. But it begs some questions on others. Look at the Steel Building (or Steel Tower or 600 Grant St. or whatever its moniker is these days). $233 million dollar assessment, but it is reported to have sold for $250 million last year all while it paid no real estate transfer tax on the deal. In past years the City of School District might have appealed against the assessment, but I suspect the political climate precludes that happening this year. This is speculation, but that steel building sale may be setting the market in the valuations.
Likewise the casino valuation will be appealed (again?), but realize that since it's base year assessment value set all sort of things have happened. The law changed allowing them to engage in the much more profitable table games was enacted and in a sense that would impact what the property is worth. For an establishment reportedly set up with $800 million in investment, you think it might be worth a third of that in the assessment valuation?
I have an idea.. they would need to change some laws for this to happen, but for anyone really balking at their assessment valuation then the fallback could be to use replacement cost.