Building Inclusion Criteria:  NYCHA buildings in Manhattan & the Bronx (stratified evenly by borough) with more than 50 units, not undergoing major renovations.  Building Exclusion Criteria:  Buildings in a borough that is not in Manhattan or the Bronx Buildings smaller than 50 units Buildings undergoing major renovations Buildings that are or will be part of Rental Assistance Demonstration (RAD) or Permanent Affordability Commitment Together (PACT) Buildings that are mixed finance Buildings that are exclusively for elderly Buildings that are privately managed  Participant Inclusion Criteria:  Recruit NYCHA residents via door knocking and lobby intercepts until we reach our targeted number per group (4 smokers, 4 non-smokers in each building). Residents will be screened for smoking status. Both smokers and non-smokers to be recruited but only one participant- smoker or a non-smoker- will be recruited per apartment. Smoking will be defined as those that report using a cigarette or other combustible tobacco product (e.g., little cigar, cigarillo) at least 5 days in the past month. Non-smokers include never smokers and former smokers who had quit 12 months ago or earlier. Additional eligibility criteria include individuals above 18 years old living in the building at least 5 days/week and 9 months/year, not planning on moving in the next 2 years.  Participant Exclusion Criteria:  Individuals with severe physical or mental medical conditions (i.e. cognitive disability) or other factors that could limit participation or ability to give informed consent in the study at baseline or during follow-ups. Individuals who participated in the earlier focus groups. Individuals who only smoke non-tobacco products (e.g., marijuana).