Providing enough affordable housing is a significant challenge across the country. For low-income households, high housing costs can lead to frequent moves that interfere with children’s school performance or force families to live in unhealthy or substandard housing. In order to identify the factors that are contributing to increased costs in Oregon, the legislature engaged the Blue Sky Consulting Group to study tax credit financed affordable housing projects developed in the state over the past two decades. The resulting analysis identified the important benefits of affordable housing while also shedding light on the factors that can influence costs, such as larger projects that benefit from economies of scale or local factors such as labor costs, system development charges, or community opposition that may add to costs.