The size of some of mega-projects entering the construction pipeline continue to amaze Electrical Marketing’s editors: $30 billion. $20 billion. $10 billion.
A billion-dollar project used to catch our eye, but we found at least 24 projects of this size either in the design phase or breaking ground since April 2026 (see chart below). No surprise that so many them are data centers, led by OpenAI’s $30-billion Project Camellia Data Center in Effingham County, GA. Of the 35 large construction projects listed in the table, 43% of them are data centers.
When you look at the big picture, the growth of data center spend is indeed far outpacing other construction categories. For example, the most recent construction spending data from the U.S. Census Bureau,  in June, Total Construction Spending was down -3.2% to $2,166 billion from July 2025. Private construction, which accounts for the lion’s share of total construction spending was down even more on a percent basis — -4.7% YOY to 1,622.5 billion. Yet, data center spending is up +45.8% over June 2025 and the $68.3 billion in new construction spent on data center projects exceeds the spending of all other individual construction categories, outside of electric power construction and spending on single-family and multi-family projects.
Despite the predominance of data centers on our list of the largest projects, there’s plenty of other mega-projects of interest. The recently announced $22-billion renovation of Washington-Dulles Airport would quite possibly be the largest airport job ever; the $10-billion Starr Vegas Development planned for downtown Las Vegas would be  massive; and the $2.8-billion new American Express headquarters that broke ground near New York’s Freedom Tower is one of the larger office projects we have seen in the post-Covid/remote officing era.