Wire arc additive manufacturing (WAAM) offers a level of geometric flexibility that has never been seen before in construction, and has great potential to deliver a substantial reduction in embodied carbon by enhancing material utilisation in steel structures. As an emerging technology, WAAM currently faces a general lack of standards, particularly in the context of construction, which presents a significant barrier to its wider adoption in the construction sector. Therefore, it is imperative to develop new standards for novel steel structures featuring WAAM components, and the aim of the present study is to make headway by establishing a framework for standardisation. First of all, an overview of the current standardisation landscape for metal additive manufacturing, with a particular focus on WAAM, is presented. The existing standardisation framework for conventional steel structures, covering requirements for constituent products, structural design and execution, is subsequently described, and areas where new provisions are needed for WAAM are identified. Finally, a framework for the future standards on steel structures featuring WAAM, informed by the existing standards on metal additive manufacturing and conventional steel structures, is proposed. The scope of the new standards is initially defined, and preliminary recommendations are subsequently made for the qualification of WAAM components, structural design methods and partial safety factors. Lastly, gaps and underdeveloped areas in the proposed framework are highlighted for future research. Through this framework, the present study will help to shape the future standards and advance the standardisation of WAAM in the construction sector.