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.