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.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.