Management of municipal solid waste (MSW) is a challenge faced by urban centres worldwide, including the European Union (EU) and Canada, as a result of urbanization and economic prosperity accelerating the generation of municipal solid wastes (MSW) along with its organic fraction. Within a concept of waste recovery, source separation and on-site treatment of urban organic waste (UOW) can resolve major economic issues and faced by urban centres along with environmental and social issues associated with landfilling. In this context and as compared to the traditional landfilling practice (Base Sce), this paper examines on-site UOW composting strategies using a combination of centralized composting facilities (CCF), community composting centres (CCC) and home composting (HC) (Sce 1, 2 and 3). This study consists of a feasibility and economic study based on available data and waste management costs. This study indicates that on-site treatment of UOW using practices such as home and community composting can lower management costs by 50, 37 and 34 % for the rich European countries (annual GDP over $25000 US), the poorer European countries (annual GDP under $25000 US), and Canada, respectively. Furthermore, on-site composting can reduce greenhouse gas (GHG) emissions by 40 % for Europe and Canada, despite gas capture practices on landfill sites.However, the performance of home composters and the quality of the compost products are issues to be further addressed for the successful implementation of UOW on-site composting.