This report documents the outcomes of the first two stages of the Brabham Action Learning Partnership, a research initiative of the CRC for Water Sensitive Cities and key Western Australian government and industry partners. After describing the case objectives and methodology, the report summarises the technical and process constraints to innovation for Brabham, the short-term and long-term implementation pathways for the proposed subsoil drainage water solution, and shares lessons for setting up and maintaining multi-stakeholder collaborations. The outcomes of the final stage of the research program are documented in the companion report, Enabling water sensitive urban development: planning and governance opportunities for Perth.