Dreams involving houses often symbolize different aspects of yourself or your life. In your dream, the house filled with ashtrays may represent your feelings about your current environment or the state of your mind. The ashtrays can symbolize clutter, habits, or negative influences that you want to clean up or eliminate.

The presence of unknown people might suggest that you are dealing with external influences or aspects of your life that feel unfamiliar or out of control. Your desire to clear up the rubbish and set rules about smoking in the living room indicates a need for boundaries and a desire to create a healthier space for yourself.

The realistic sensation of smelling smoke can highlight the intensity of your feelings regarding these issues. It may suggest that you are grappling with something that feels pervasive in your life, something that you want to remove but find difficult to address.

Overall, this dream could be encouraging you to take action to tidy up both your physical space and your mental state. Think about what aspects of your life feel cluttered or unhealthy, and consider steps you can take to reclaim your environment and set boundaries with others.