Overall, investment in building construction decreased 1.1% (-$243.3 million) to $21.4 billion in October, after a 2.6% increase in September. Year over year, investment in building construction grew 3.4% in October. In October, investment in the residential building construction sector decreased by $312.3 million to $14.9 billion, while investment in the non-residential sector rose by $69.0 million to $6.5 billion. Investment in multi-unit construction was the only component to post a decrease (-5.1%; -$423.2 million) in October, dragging down gains posted in the other components. On a constant dollar basis (2017=100), investment in building construction decreased 1.1% compared with the previous month to $12.9 billion in October, but was up 0.3% year over year.