The article is devoted to the ecological assessment of buildings as the human environment based on the Green building conception. Authors proved the relevance of assessment of the impact of real estate as the man-made environment elements on the environment and human health. The concepts of comfort and safety of buildings and facilities for the people, which are considered as the basic category required for the formation of an effective human capital, were introduced in this article. The need to move from a traditional design and construction to the "green" was highlighted and its main objectives were marked. The actions of "green standards", which are an effective tool for environmental assessment of buildings, were described. The main objectives of the introduction of eco-standards and rating systems, and eco-certification were identified in this article. International and national standards were reviewed separately. The main criteria for evaluating the environmental performance of real estate included in the structure of various "green" standards are systematized. The structure of the existing national and international eco-standards, including Russian is reflected intuitively. Their basic features (for example, the minimum requirements for certification in one of the standards require compliance with all the criteria perfectly, and in the other - a certain set of minimum criteria) are marked, as well as strengths and weaknesses. In the article possibilities of adaptation of the most common eco-standards for use in other countries with different climatic, social, political and other features are indicated. Authors compare national and international "green" standards (including the Russian GOST R 54964-2012) in terms of their structure and composition of the main criteria for the environmental assessment of the property. The comparison highlighted basic categories common to all existing standards, as well as unique criteria inherent in this or that assessment systems. The authors also examined the application of various eco-standards and concluded that the same standard cannot be used simultaneously for residential, public and industrial buildings because the priority requirements for environmental safety directly depend on the destination of the property. The authors have formulated proposals for improvement of the Russian national ecological assessment system: the introduction of new criteria and a detailed study of existing, developing effective evaluation methodologies, the adjustment of the standard requirements depending on the destination of the property.