Its a concrete and steel building, so they will boast that it is sound proofed. The reality is even the absolute best construction you will be able to somewhat hear your neighbors if they are being loud. In general altessa is one of the nicer built buildings in u.city. You should also check out 4301 park-not as many amenities but a very nice solid build building. If your not working with a realtor and would like some help please feel free to call I'm very familiar with u.city and hudson county for that matter. Hope that helps anthony curty liberty realty 201-937-8802.