Abstract The London Borough of Tower Hamlets conducted a policy analysis to explore the key challenges to the delivery of Health Impact Assessment (HIAs) Policy within the infrastructure development setting in order to enhance service delivery through effective policy implementation, in order to influence the wider determinants of health. This study tested whether the mechanisms provided by the planning system are achievable and measurable or whether policy changes are needed to make the delivery of HIAs more effective.A policy analysis research method was undertaken underpinned by grounded theory, that identified thematic categories and the relationship between them. A purposive sampling technique was used to identify participants to respond to a pre-defined survey questionnaire and stakeholder interviews. The codes and subsequent themes identified through primary research, aligned seamlessly into five themes identified through the literature review, strengthening critical analysis and ratifying subjective and objective data sources. Recommendations were made to enhance the evidence base by conducting an evaluation on the emerging policy, demonstrating how HIAs can be an effective decision-making tool. A proposal was made to build capacity within the LA by developing operating guidance and bespoke assessments tools, alongside a training and development package as well as recruiting a dedicated HIA officer. Finally, the author proposes to develop tools to support the policy externally though quality assurance frameworks and topic papers to clarify and manage expectation with developers, elected members and our residents. External funding details