Everything you know. You’re required to provide a written description about any known issues with your home that could hurt its value. Those issues include: termite damage, presence of lead-based paint, foundation cracks, plumbing or HVAC issues, septic or sewer problems, HOA fees and restrictions. The seller disclosure is good for buyers AND sellers, as it brings transparency to the transaction, minimizes delays, and heads off risk of legal headaches down the road.