Ontario is projected to fall over 550,000 homes short of its 1.5 million new homes target by 2031 due to fragmented and outdated zoning and building codes. A provincial zoning code with standardized rules for housing types and limits on restrictions like parking and setbacks is recommended. Changes to building codes, such as allowing single-stair buildings up to six storeys, could reduce costs and delays. Increasing housing supply is essential for lasting affordability.