Total Construction Spending: Total Construction in the United States (TTLCON)

Source: U.S. Census Bureau  

Release: Construction Spending  

Units:  Millions of Dollars, Not Seasonally Adjusted

Frequency:  Monthly

Definitions related to the construction data can be found at https://www.census.gov/construction/c30/definitions.html
Methodology details can be found at https://www.census.gov/construction/c30/methodology.html