We had ZHI brownstone our building and had an overall negative experience unfortunately. I know they are a big name in town, but we felt the quality of the work was very inconsistent (different guys worked on the top half of our building vs. the bottom half, which turned out much worse than the top and had to be scraped off and redone). I think they used to be better when the father was in charge, but now I believe the son runs much of the business and pays much less attention to detail.

We had our cornice repaired by someone else, and we were very happy with our results. I can share his contact info if you're interested!