When a team from Latham & Watkins filed a long-shot challenge to New York City's property tax system back in 2017, they brought the data: Homeowners in Canarsie, a majority-minority neighborhood, were paying effectively three times the tax rate charged their Brooklyn neighbors in wealthy, majority-white Park Slope. Some upscale cooperatives valued at $4,500 per square foot were being taxed as if they were rent-regulated apartments worth $188 per square foot.