Abstract
Improvement of the ecological aspect in residential buildings is connected with the need for high investment expenses, which meets with little interest from investors, who are mainly interested in decreasing investment building costs rather than maintenance costs or environmental protection. To change this attitude, it is necessary to evaluate the validity of applications in terms of pro-ecological solutions, technologies and materials used. This is the basis for developing a mathematical decision support model when choosing ecological solutions. Application is demonstrated on the example of the selection of ecological solutions for a residential building.