About Union Street Flats Union Street Flats opened in 2013, and since then has been synonymous with luxury apartment living here in Westfield. From spacious floor plans ranging from 1 bedroom apartments to 3 bedroom townhomes, to a vast array of community amenities, we’ve built an unrivaled Westfield living experience, and we hope you can be a part of it. Union Street Flats is situated close to E 171st St. and S Union St. and is a few short minutes away from Grand Park and Cool Creek Park. With easy access to US 31, you can get the best of both worlds with your new place at Union Street Flats–a convenient location alongside comfortable surroundings. Union Street Flats is Does Union Street Flats seem like somewhere you might see yourself in the future? Take a tour and take a closer look at what your new home could offer you.