The building at 393 West End Avenue, put up in 1926, is being converted to 75 condos (down from an initial plan of 88) by Rabina and Simon Baron Development. Though this type of project was all the rage in the mid 2010s, it is now among a dying breed: Conversions fell out of favor in 2019, when state legislators passed new tenant protection laws meant to keep renters from being displaced.