Materials & Labor - Discussion Brief

FC BS+B Session A6 · June 25, 2026 · leader prep (facts cited, tap any source)
The myth is "materials are what cost money." The sharper story your A6 page already makes: labor hours, sequencing, coordination, and rework drive cost more than material unit prices. And labor is the one input that is getting scarcer while barely getting more productive.

1Where the money actually goes

There is no clean official labor-vs-materials split. NAHB's "Cost of Constructing a Home" bundles labor and materials together within each stage. Average construction cost was $428,215 in 2024 (64.4% of the sale price). [NAHB 2024]
A common industry rule of thumb puts labor at roughly 30-40% of hard construction cost, materials a bit more, so "labor is half" sits at the high end. NAHB's own survey does not isolate labor, so the precise split is genuinely hard to pin down. [NAHB 2024; the 30-40% range is a general industry rule of thumb]
The biggest single cost categories are finishes and MEP rough-ins (plumbing + electrical + HVAC), which alone are 19.2% ($82,319) of construction cost. [NAHB 2024, via A6]
The real signal: wood/composites line-item costs rose 110% in a decade while the lumber materials price index rose only 39%. That ~70-point gap is labor and process inefficiency, not material cost. [Terner Center, Hard Costs of Construction 2020]

Takeaway: argue cost in labor-hours and rework, not unit prices.

2Why construction is different from cars and electronics

Since 1950, US economy-wide labor productivity has grown about 290% (nearly 4x), while construction-sector productivity has actually fallen below its 1950 level. Seventy years; the economy multiplied, construction went backward. [Goolsbee & Syverson, "The Strange and Awful Path of Productivity in the U.S. Construction Sector," NBER 2023] · [Construction Physics]
Even over just the last two decades, manufacturing labor productivity more than doubled (+103%) while construction crept up only +22% (compounding McKinsey's ~3.6% vs ~1% annual rates). Closing the gap is a ~$1.6 trillion/year global opportunity. [McKinsey Global Institute 2017]
Cars and electronics got cheaper because they industrialized and automated labor out. Construction largely did not. It stayed fragmented, on-site, and custom, so labor stays a large and rising share of cost. [Construction Physics]
Unlike most manufactured goods, construction costs rarely fall. They rise at or above general inflation. [Construction Physics]
Why it resists industrializing: fragmentation, historically cheap labor, low-density patterns, and zoning that pushes toward custom, complex, hard-to-systematize projects. [Potter, Aspen Institute 2025]

3The labor squeeze

81% of construction firms say lack of available labor is their most significant challenge. [Freddie Mac / AGC 2021, via A6]
The industry needed to attract about 439,000 extra workers in 2025 and ~349,000 in 2026, on top of normal hiring, just to keep pace. [ABC] [Construction Dive]
The workforce is aging out faster than it is replaced. Roughly 41% of the construction workforce is projected to retire by 2031. [NCCER]

Scarcer labor + flat productivity = labor-cost pressure that will not ease on its own.

4The counter-current (your optimism was right)

The WSJ dubbed Gen Z the "Toolbelt Generation." Construction-trades program enrollment rose about 23%, and vocational-focused community-college enrollment hit its highest level since 2018 (+16%). [WSJ / National Student Clearinghouse 2024, via NPR]
Gen Z interest in the trades is real and rising. Drivers: soaring 4-year-college costs, strong trade wages, and plausibly AI anxiety steering people toward hands-on work that is hard to automate. [NPR 2024]

Live question for the room: enough to offset the retirements, or a drop in the bucket?

5Levers that actually cut labor cost

6Discussion questions

Opener (myth-buster): When someone says "we need cheaper materials," is that ever the real lever, or is it labor, rework, and coordination?

  1. Which material substitution saved money on paper but cost more once labor, waste, inspection, or callbacks were included?
  2. On Northern Colorado projects, which trade or constraint most often controls the schedule, and where does the cost show up first: idle days, price premiums, resequencing, rework, or callbacks?
  3. Which detail or assembly should local builders standardize because saving labor hours, handoffs, or callbacks justifies paying more for materials?
  4. Cars and phones got cheaper as they industrialized; houses did not. What is the single biggest reason construction never industrialized here, and is that changing?
  5. If skilled labor keeps getting scarcer and pricier, what actually closes the gap locally: prefab/modular, better training pipelines, fewer standardized details, or design that simply needs less labor?
  6. Will the "toolbelt generation" meaningfully offset the retirements we are seeing, or not even close?
  7. What is one change to local code, inspection, or contracting that would cut labor hours without cutting durability?

7Quick fact-check (so you are bulletproof)

If someone asserts "labor is half the cost," gently reframe: no one cleanly measures it, the usual estimate is ~30-40%, and NAHB does not even separate labor from materials. The sharper, defensible point is that labor hours and rework, not unit prices, move the number (Terner: line items +110% vs materials +39%). [NAHB / Terner, via A6]

Sources