Recently, Microsoft released 125 million US building footprints as open data across 50 states. The data is freely available for download and use. You can read about previous release of 9.8 million buildings here.

With the help of tippecanoe and Mapbox Studio, I have visualized Hawaii dataset to know how data looks like.

Sharing few screenshots and gif: Honolulu

The dataset doesn’t contain height attributes and looks good for me. You can find it in Github.