High medical and energy costs, limited incomes, and narrow comfort ranges present multiple health-related challenges for older adults. A variety of studies indicate that weatherizing and repairing the homes of elderly households can help to address some of these issues, ultimately improving resident health and reducing energy and health costs. Essentially, weatherization and home repairs can serve as preventative healthcare in some situations. Several pilot programs have recently been launched that build on these findings. Additional pilots and good evaluations of their impacts are both needed. Ultimately, these programs hold promise for improving health and reducing medical costs.