This document specifies the safety rules related to passenger and goods/passenger lifts installed in existing buildings where limitations enforced by certain building constraints mean that some requirements of EN 81-20:2020 cannot be met. This document is intended to be read and applied in conjunction with EN 81-20:2020. It addresses the following constraints and gives requirements for alternative solutions: existing perforate walls of the lift well; reduction in available well are leading to reduced distance between car, counterweight or balancing weight; counterweight or balancing weight in a separate existing well; reduced building dimensions and clearances leading to: reductions in available space for headroom and pit; reduced car roof balustrade dimensions; reduced height of sill apron; reduced height of machine and/or pulley room; reduced available area for access door/trap door; reduction in available height of landing doors. This document is not applicable to lifts installed before the date of its publication.