What we can do as of Condo owners to stop our downstair neighbor from complaining regarding walking talking and opening balcony door after 11 pm?

Answer 1

Unless your Condominium documents contain some kind of covenant or established rule or regulation that addresses this matter, your neighbor has no valid grounds to complain.

However - if your documents say something about "excessive noise" or refer to "quiet hours" they may properly complain to the Board of Directors about your actions. It then becomes incumbent upon the BOD to decide the validity of the complaint and and to either act upon it or reject it.

Whether this will have the effect of ending the complaining is anybody's guess.

Another Answer

Living in close proximity with other people always produces friction like this, based on life style combined with sound proofing.

Best practices dictate that everyone involved in the complaint sit down together and discuss the situation, calmly with a goal of negotiating a compromise that almost satisfies everyone involved. If you need a mediator, or someone to help maintain calm, call in a board member, or a competent, wise neighbor.

Meet up at the local library or some neutral place for the conversation. Give everyone the space to state their 'case'.

Once the people involved understand the requirements and the physical limitations of the shared space, they can agree to modify behaviour in some ways and expect less in other ways.

Another option is to call in soundproofing experts and spend money individually on soundproofing the spaces.