August construction spending ticked up, but Census says the top-line gain is uncertain

What changed

The U.S. Census Bureau released its August 2026 Monthly Construction Spending report on Oct. 1. Total construction spending was estimated at a seasonally adjusted annual rate of $2.2031 trillion, up 0.9% from revised July spending of $2.1845 trillion. The release is here: https://www.census.gov/construction/c30/current/index.html

Treat that monthly gain carefully. Census marked the 0.9% change with an asterisk and a ±1.0 percentage-point interval. A Census Construction Spending bulletin explains that the asterisk means the 90% confidence interval includes zero and that Census lacks sufficient evidence that the actual change differs from zero.

The year-over-year comparison was weaker. August 2026 total construction spending was 1.7% below the August 2025 estimate of $2.2420 trillion. For January through August, spending totaled $1.4504 trillion, 3.1% below the $1.4966 trillion reported for the same period in 2025.

What it means for the shop

For HVAC, plumbing and electrical contractors tied to construction, the release is a demand signal, not a backlog report or a forecast. Census says the Construction Spending survey covers construction work done each month on new structures or improvements to existing structures in the private and public sectors.

The measure includes mechanical and electrical installations such as plumbing, heating, electrical work, elevators, central air-conditioning and emergency backup power. Census excludes maintenance and repairs to existing structures or service facilities, so this report does not directly measure service, repair or maintenance demand.

Private construction spending was estimated at $1.6553 trillion in August, up 1.1% from revised July’s $1.6377 trillion, with a ±0.5 percentage-point interval. Private residential construction was $882.3 billion, up 1.1% from revised July’s $872.7 billion, but that change carried an asterisk and a ±1.3 percentage-point interval. Private nonresidential construction was $773.0 billion, up 1.0% from revised July’s $765.0 billion, with a ±0.5 percentage-point interval.

Public construction was flatter in the release. Public spending was $547.8 billion, up 0.2% from revised July’s $546.8 billion, but Census marked that change with an asterisk and a ±2.0 percentage-point interval. Educational construction was $113.1 billion, up 0.1% from revised July’s $112.9 billion, also with an asterisk and a ±1.5 percentage-point interval.

What remains unknown

The supplied Census materials do not provide usable August 2026 table values or month-over-month changes for commercial, manufacturing or health care construction. They also do not provide category-level year-over-year changes for private residential, private nonresidential, commercial, manufacturing, health care, educational or public construction.

The figures are adjusted for seasonal variation but not for price changes, according to Census. That means the release should not be read as inflation-adjusted growth.

The evidence does not establish regional conditions, contractor backlog, bid activity, retrofit demand or service demand. For now, the practical takeaway is narrow: August’s national construction-spending report showed a statistically uncertain top-line monthly increase, stronger private categories in the monthly data, and total spending still below last year.