This document discusses scaling up circular economy innovations in the construction sector. It outlines barriers to scaling, including financial investment challenges, risk aversion in the low-margin construction sector, split incentives across the value chain, and resistance to change. It then presents a program with four workstreams to help circular scale-ups and their business partners overcome these barriers: 1) research on best practices for scaling, 2) hands-on coaching for scale-ups, 3) collaborations on large circular projects, and 4) training for contractors on circular contracting. The goal is to triple the probability of scale-ups succeeding and accelerate the transition to a circular construction industry.