This document discusses capacity building needs for transparency frameworks under the Paris Agreement and proposes a comprehensive capacity building assessment process. It summarizes capacity needs identified in countries' first Biennial Update Reports and notes gaps in institutional arrangements, inventories, mitigation, and monitoring, reporting and verification systems. It also reviews the types of capacity building activities undertaken from 2012-2015 but notes a lack of information on their scale, duration and impact. To better align needs with support, the document proposes a feedback-based, outcomes-driven capacity building assessment process within the transparency framework that strategically improves existing systems and finds synergies across processes to enhance transparency.