Objective To develop a self-report assessment tool for evaluating age-friendly living environment for urban home-dwelling older adults. Methods Based on the WHO′s age-friendly city guide, draft of an index system was developed through literature review and qualitative interview, then two rounds of expert consultation were conducted on 20 experts using the Delphi process. Results The return rate for questionnaires were 90.91% and 90.00% respectively. The specialist authority coefficient (Cr) was 0.865 in the second round and the Kendall′s coefcients of concordance (W) were between 0.305 and 0.671. The final index system included six primary indicators of outdoor spaces and buildings, transportation, housing, social interaction and participation, community support, information and communication, totaling 84 secondary indicators. Conclusion The self-report instrument achieved good consensus after two rounds of expert consultation, which can be used to evaluate living environments for urban home-dwelling older adults in China.