The aim of the project is to support the technical assistance of the Main Building Supervision Authority (GUNB) and 16 voivodship building supervision inspectorates (winb), i.e. services responsible for matters related to investment control and issuing decisions on the use permit, among others for POIiŚ and CEF projects. The support provided will improve the efficiency of wineb work and will improve the supervision of these investments by increasing the number of controls at the construction stage and increasing the number of samples taken of construction products. Intensifying the inspection of construction sites will allow the construction supervision to become aware of the construction process in advance and therefore eliminate possible irregularities at a sufficiently early stage, so that they do not in future constitute obstacles to obtaining a permit for use. In order to fulfil these tasks, it is necessary to provide GUNB and wineb with adequate staff and administrative and technical facilities. Hence, the project plans to finance expenditure on salaries of employees performing tasks related to POIiŚ and CEF projects, expert and legal support, organisational, technical and administrative costs. The project is compatible with the provisions of the programming documents, i.e.: — Operational programme Infrastructure and Environment for the years 2014-2020, – Detailed description of the priority axes of the Operational Programme Infrastructure and Environment 2014-2020, – Guidelines for the use of technical assistance measures for the period 2014-2020 – Guidelines for the eligibility of expenditure under the European Regional Development Fund, the European Social Fund and the Cohesion Fund for 2014-2020.