This Study describes a methodological approach based on the use of GIS and multi criteria analysis to identify Tree planting sites in Manchester. A set of criteria were defined to evaluate tree planting sites. After defining the criteria, next step was to selecting suitable indicators and variables to measure the selected criteria for analysis. Later on these criteria were ranked using the pair wise comparison method of multi criteria analysis and results was integrated into GIS. Multi criteria analysis and GIS is an effective approach for GIS decision makers as it allows one to gradually narrow down a problem. Integration of multi criteria analysis and GIS will give decision makers to explore the options of providing effectiveness to the factors.This study also shows that how GIS and MCE are a powerful tool for decision makers and how it helps people in identifying problem areas that need immediate attention or for further planning purpose.