Source: US. Bureau of Economic Analysis
Release: Gross Domestic Product by Industry
According to the source, value added represents the sum of the costs-incurred and the incomes-earned in production, and consists of compensation of employees, taxes on production and imports, less subsidies, and gross operating surplus.
US. Bureau of Economic Analysis, Value Added by Private Industries: Construction as a Percentage of GDP [VAPGDPC], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/VAPGDPC, July 25, 2016.