Clarifying the demand factors for green construction, as well as evaluating their advantages, is important in the construction process not only in the private sector but also in the public and public buildings sector. An actual question is how to measure green building criteria, according to international sustainability systems, in relation to green public procurement criteria. The authors of the research note that it is important to determine mandatory criteria for green public procurement in construction in Latvia and the steps for their implementation. The research finds out the demand factors for green construction and the advantages they provide, also analyses how green construction can be measured, what measurement systems are, and explains the regulation and standards of green construction. To obtain correct results, research was conducted on the application trends of green public procurement criteria, and the ten largest public building construction procurements in Latvia were evaluated. The procurement criteria of the green public building Ogre Library and their compliance with green public procurement criteria have been assessed for credibility. Calculations of the life cycles of buildings have been carried out to justify the advantages of the construction, maintenance, management costs, and environmental impact of the green building in relation to an alternative building, as well as the author of the work provides proposals to introduce mandatory green public procurement criteria in Latvia and will indicate the steps to be taken for their implementation. Comparing the costs of building maintenance and management over a 20-year period, it was proven that green building is a more efficient solution in terms of costs and environmental impact, although the short-term total capital investment is higher than the cost of an alternative building.