Majority of the old and unplanned cities of the developed countries and fast growing irregular and unplanned cities in the developing countries have no static address in their buildings. Some technologies like what3words, plus codes, six-point maps exist but they work good only when the parcel size is bigger. The cost of assigning the address by manual survey is very costly. Leveraging the availability of the high-resolution satellite imagery and geospatial technology, a cost effective, reliable and semi-automatic system is developed for generating and maintaining the metric house addressing system using open source software. An interactive and easy-to-use web gis based application is developed and implemented in a municipality of western Nepal and the result was cross validated with the field-based address. It could generate address to all the building footprint provided with 100% accuracy in identifying the associated road, side of the building and with a very negligible variation in distance of 2 meters. This application can be used for maintaining not only the building footprint, their address and road but it can also store non-spatial attribute of the building like business entities, tax related information, household survey and many more. The application can be a major milestone for the implementation of e-government services, e-commerce activities and can be the baseline information for smart city. The system can be applied seamlessly to any cities of the other parts of the world.