This report seeks to assess the extent of favouritism – i.e., preferential treatment for some bidders over others – in the allocation of public procurement contracts in the construction sector in Croatia. The methodology is based on identifying opportunities for favouritism and evaluating the effectiveness of constraints. The research finds that Croatia’s public procurement law sets a high standard and there are numerous transparency and control mechanisms in place. Nevertheless, the integrity of procurement is undermined because a large share of it is contracted by entities which are owned by government units and thus subject to political influence and constrained by a much weaker control framework. Data on the procurement of high-value construction works is analysed for indicators of favouritism in the process or outcomes. Whilst there is only limited use of restrictive procedures, competition for public contracts is surprisingly weak in a sector under considerable economic pressure. Moreover, around one-half of the total contract value is won by tenderers which are not private companies but rather entities that are partially or fully owned by the state. This raises further questions about the potential for political leaders to influence the process in order to achieve favouritism in the allocation of public contracts, to benefit themselves or third parties. Evidence from the verdict of a trial involving high-ranking politicians suggests further that such favouritism may be widespread.