Abstract The Kingdom of Saudi Arabia (KSA) has adopted a new law and policy framework, Vision 2030, designed to deliver a transition to a diversified and low-carbon economy. This paper analyses from an environmental law and policy perspective how law is providing opportunities and challenges in achieving the outcomes of this national masterplan. The paper employs traditional legal scholarship to assess the law itself and also explores its impact in practice, via an analysis of findings from expert stakeholder interviews. Key issues around environmental governance are discussed in depth in the light of Vision 2030. One of the key issues of focus is that of integration, in terms of the design and practice of law, institutions and outcomes. To date, it is clear that the further policies needed to ensure that environmental integration and a low-carbon transition take place are currently being created in the effort to deliver the aims of the Vision. This study finds that the transition to a low-carbon economy in the KSA is under-researched and under-explored in practice, from an environmental perspective. The findings attest that although some significant actions have been initiated, further action needs to be taken, given the importance of this transition, in the KSA in the light of the promising nature of Vision 2030 in this regard.