The Builders' Blueprint

On October 15, the September Producer Price Index put numbers on a squeeze that has been building all summer. AGC's analysis found that inputs to new nonresidential construction rose 11.9% from September 2025 to September 2026, the most in four years. ABC's analysis of the same release put overall construction input prices up 2.2% in the month and 11.2% on the year, the largest annual increase in nearly four years. The detail that matters to an owner sits underneath those headlines: the producer price index for new nonresidential building construction, which tracks what contractors would charge, rose only 5.4%. For now, contractors are absorbing the difference, and for a Houston medical, dental, or veterinary owner that is a reason to buy out the cost-sensitive packages before the squeeze reaches the price.

What the September data says

The two trade groups measure slightly different baskets, which is why 11.9% and 11.2% both appear. They agree on direction and on cause. The detail:

• Acceleration: AGC's input-cost figure was 7.1% in its July analysis, 8.9% in its August analysis, and is now 11.9%. The trend has been up three months running.
• Metals: steel mill products are up 28% year over year, copper and brass mill shapes 30%, and aluminum mill shapes 25%. AGC ties the metals increases to tariffs of up to 50% imposed about a year earlier.
• Fuel and concrete products: the diesel fuel index is up 115% year over year, liquid asphalt 18%, and precast concrete products, which have steel embedded in them, 10.5%.
• What contractors charge: the index for new nonresidential building construction is up 5.4% year over year, less than half the rate of the inputs.
• Contractor outlook: ABC reports that more than one in four contractors in its Construction Confidence Index expect profit margins to contract over the next six months. Chief economist Anirban Basu attributes a substantial share of the increase to higher fuel prices tied to the conflict in Iran and to continued rises in tariffed materials such as iron, copper, and other metal products.

Why the gap between 11.9% and 5.4% matters

AGC's read is that contractors are absorbing most of the increase because demand outside the data center boom is soft and they are competing for work. That is a rational response for a quarter or two. It is not a stable position, because a contractor cannot buy material at one price and sell it at a much lower one indefinitely. Our reading, which is analysis and not a forecast from either association, is that the repricing shows up where it is least visible: in bids that arrive thin on scope, in allowances and exclusions that later become change orders, in substitutions, and in subcontractors stretched past what their margins can carry. For an owner, the lowest number in a bid tabulation deserves more scrutiny than usual, not less.

The supply side: order books through spring 2027

Price is only half the problem. Reporting by Construction Dive on October 16 relayed that supplier order books are full through spring 2027, that some firms have been told they will receive only a small fraction of the steel beams they ordered, that lead times for key steel components have lengthened, and that some alternative suppliers are refusing orders from new customers. AGC chief economist Ken Simonson described the situation as a “double whammy of tariff- and war-induced materials cost increases.” An owner who waits to release steel or equipment until the building is permitted may be joining the queue behind customers who ordered months ago.

The Texas and Houston read

The Dallas Fed's October 14 Beige Book, which covers the Eleventh District that includes Houston, adds regional color. Respondents most commonly cited diesel as the cost driver compressing margins. Data center construction is raising labor costs and pulling workers from other industries, and data center developers report difficulty finding electricians and technicians. New data center construction has slowed because Texas paused permits while it audits grid and water effects, which may ease some pressure on electrical trades over time but has not yet. For nonfinancial services, the report says health care activity weakened over the period, a district-wide statement that is not specific to Houston construction.

On labor, national first-year union wage-and-benefit settlements averaged 4.9% from January through September 2026, up from 4.6% in 2025, according to the Construction Labor Research Council as reported by AGC. And on October 15, KPRC Click2Houston reported that the Greater Houston Builders Association's CEO, Aimee Bertrand, says concern about labor has grown since about mid-summer, and that several greater Houston contractors say they lost multiple workers to immigration enforcement over the past year. The NAHB figures in that story — immigrants are over a quarter of construction workers and shortages add roughly two months to build timelines — describe home building, so this brief cites them as a Houston labor-market signal and does not apply them to commercial schedules.

By the Numbers

• 11.9% — inputs to new nonresidential construction, September 2025 to September 2026 (AGC); 7.1% in July, 8.9% in August
• 11.2% — overall and nonresidential construction input prices, same period (ABC); +2.2% in the month, +2.3% for nonresidential
• 5.4% — index for new nonresidential building construction, what contractors would charge (AGC)
• 28% / 30% / 25% — steel mill products / copper and brass mill shapes / aluminum mill shapes, year over year
• 115% — diesel fuel index, year over year
• Spring 2027 — how far supplier order books are reported full for key steel items
• 1 in 4 — ABC contractors expecting profit margins to contract over six months
• 4.9% — average first-year union wage-and-benefit settlement, January to September 2026

Six moves for a Houston medical, dental, or veterinary owner

1. Buy out the metals-heavy and long-lead packages first. Structural and miscellaneous steel, electrical gear, mechanical equipment, and copper-intensive plumbing and medical gas scope should be committed with written lead times and dates before the rest of the project is bought out. Dental and veterinary suites carry little structural steel but a high share of plumbing, electrical, and mechanical scope, which is where their exposure sits.
2. Require dated quotes with stated hold periods and a named escalation owner. A quote that does not say how long it holds and who carries movement afterward has not priced the risk, only deferred it.
3. Ask every bidder how it handles fuel. With diesel up 115%, ground-up projects with site work, hauling, and concrete deliveries are exposed. A fuel adjustment tied to a published index, with a cap, is often cleaner than an unexplained increase in the number.
4. Level the bids for scope, not just price. When contractors are absorbing cost, thin scope and generous exclusions are where the savings come from. Reconcile allowances, exclusions, and alternates line by line before comparing totals.
5. Look at the subcontractor, not only the contractor. Margin pressure falls on the trades first. Confirm financial capacity and backing on critical packages, and name the superintendent and lead foremen in the agreement, with written approval for replacements.
6. Decide substitutions during design, not after bid. Approved equivalents for metals-intensive assemblies are cheapest to evaluate while drawings are still open. Re-run the budget with metals-heavy lines at the rates above and keep contingency for owner scope, not for escalation you could have priced.

The Takeaway

The cost data this week is not the whole story; the gap is. Inputs are up 11.9% while the price of the finished building is up 5.4%, and the difference is sitting inside contractors' margins for now. An owner who waits for the market to settle may find that the margin repair arrives at the next bid, and that the steel and equipment it needs are already spoken for through spring.

The disciplined response is operational: commit the long-lead packages early, write the escalation terms down, level scope before comparing price, and put named people on the job. That is a discipline of preparation and prediction, and it applies to an 11,000-square-foot clinic and to a 4,000-square-foot dental suite alike.

Forward Always.

Sourcing: Bureau of Labor Statistics Producer Price Index for September 2026, released October 15, 2026, as analyzed by AGC (AGC News, “Construction Input Costs Jump 11.9% as Price Pressures Spread Across Industry,” October 15, 2026; AGC Data DIGest, Vol. 26, No. 39, October 12–16, 2026, for the metals, diesel, concrete, bid-price index and union settlement figures) and by ABC (reported by HPAC and Construction Dive, October 15–16, 2026, for the 2.2% monthly and 11.2% annual figures and the Construction Confidence Index finding); Construction Dive, “Iran conflict pushes construction prices to near 4-year high,” October 16, 2026 (supplier order books, steel lead times, Ken Simonson quote); AGC releases of August 13 and September 10, 2026 (7.1% and 8.9% earlier readings); Federal Reserve Beige Book, Dallas District, October 14, 2026; KPRC Click2Houston, “Houston construction industry faces labor shortages amid immigration enforcement,” October 15, 2026. AGC and ABC use different baskets, so their figures differ. AGC's full October 15 release was not accessible to this author, and the figures attributed to it are from its published summary and its weekly Data DIGest. The interpretation of the gap between input costs and bid prices is the author's analysis, not a statement by either association. The Beige Book health care comment is district-wide. NAHB figures describe home building. This brief is operational analysis, not legal, procurement, or financial advice.