What if you could change your decades-old house into a modern, comfortable, energy-efficient home in less than ten days without having to move out or pay extra? Does it sound too good to be true? That’s exactly what a consortium of construction companies and social housing corporations are doing in the Netherlands. The ambitious program that could drastically cut Dutch residential energy consumption is called the Rapids (de Stroomversnelling in Dutch). Its aim is to collaboratively develop an industrial approach to net-zero retrofitting of the Dutch housing stock, while retrofitting 111,000 social houses by 2020. Social houses are owned by social housing corporations, which rent at least 90 percent of their housing stock to people with a relatively low income. The Rapids focuses primarily on typical Dutch terraced houses that were built in large quantities from the 1950s until the 1970s, making them a significant part of the Dutch housing stock.