Accessibility is often considered (inappropriately) as an add-on, but needs to be hardwired into water, sanitation and hygiene (WASH) services and systems from the outset. To achieve their rights to WASH, people with disabilities must be explicitly included in WASH programs, services and systems. Ensuring the accessibility and sustainability of WASH services, systems and infrastructure is fundamental to this process. Accessibility must be in place to achieve whole-of-community climate resilience. It is critical to measure and monitor progress towards disability equity within WASH, including achievements on accessibility. Resources for the development sector on accessibility and user-centric approaches to WASH are becoming widely available. However, there is still a need for additional guidance for WASH practitioners on what universal accessibility is and how they can track and measure their progress towards achieving accessibility in WASH. This learning brief provides lessons and guidance, drawn from the experiences of Water for Women, on measuring accessibility within WASH programming to achieve disability equity