Sources for local market appreciation numbers?

[Johann Jells]

I need to slap a value on a couple of my properties for college CSS forms.  I would think any reasonable methodology would be acceptable, or at least defensible.  Since I have 2012 appraisals for 2 of them, I thought maybe zip code stats for % increase since then would work.  It looks like Zillow no long provides the City and Neighborhood graphs along with its Zestimates history.

My other building will be real hard, multifamily owned for 19 years in a very hot market. Tempted just to use what the city says it's worth on the assessment, which is well below real value.

Sources for appreciation stats or any ideas would be welcome.