LL 152 stipulates that building owners must have subsequent inspections conducted every fourth calendar year after the initial inspection. It should be completed no later than December 31 of that year. So, a building that was inspected in 2020 will need another inspection in 2024, then in 2028, and so on. Note that this only applies until 2024 when all buildings will have their inspections due on the anniversary date of their initial inspection every four years. So, if your building was inspected on December 20, 2021, after 2024, that will be your due date moving forward. It’s also important to note that gas inspections cannot be conducted more than 60 days before the official due date.