Corporate social responsibility is defined by five dimensions; the dimension of voluntariness, the environmental, social and economic dimensions, and the dimension of stakeholders. The importance of stakeholder involvement is particularly emphasized. Stakeholders are part of society, with influence and interest in the observed company. Corporate social responsibility can be divided into internal and external. It's contained in the company's strategy, and it's presented in a non-financial report using standards and guidelines. Given that the impact of construction companies on the environment and society is twofold, complex and comprehensive, in construction, corporate social responsibility is increasingly assessed as one of the factors contributing to sustainable business. The thesis highlights the achievement of internal socially responsible business for construction companies and internal stakeholders, human resources and employees. Employees are the foundation and key resource of any construction company. Activities and practices of internal socially responsible business relate to health, safety, workplace, wellbeing, equality, education, development, innovation, relations and employment. This increases the engagement, motivation, happiness, satisfaction and productivity of employees, as well as the trust and commitment of employees to the company. All of the above leads to a reduction in the number of absences from work and leaving work, a reduction in operating costs and an increase in the success and competitiveness of companies while retaining and attracting quality employees. Investing in human resources, through the mentioned activities and practices, is of great importance for construction companies in Croatia, given the shortage and migration of employees. The thesis analyzes and presents examples of good practice for construction companies from around the world and a case study at a large Croatian construction company.