To select fire-rated and soundproof doors for apartments, builders must match the door rating (20, 45, 60, or 90 minutes) to IBC and NFPA 80 fire-rated door requirements, ensure certified hardware and proper installation, and choose solid-core doors with adequate STC ratings for noise control. Compliance with residential fire-rated door requirements and correct wall ratings ensures safety, inspection approval, and long-term durability.