Small Business Growth Partners
Market Analysis

Same House, Five Times the Inflation:
Why Small Builders Pay 9.1% and Nationals Pay 1.8%

Builders with five or fewer starts saw material costs rise 9.1% last year. Builders with 100 or more saw 1.8%. Add diesel up 77.7% and wire up 19.6%, and the gap between what you quoted and what you’ll pay is the profit you thought you had. Here’s the data, and here’s how to close it.

September 2026
Materials & Job Costing
● Active Tracking
9.1% vs 1.8%
Median annual material cost increase, builders with 5 or fewer starts vs 100 or more (NAHB HMI survey, July 2026, published August 26)
+5.1%
Building materials excluding energy, year over year, August (BLS PPI, NAHB tabulation, September 10, 2026)
+77.7%
No. 2 diesel, year over year, August (BLS PPI, NAHB tabulation, September 10, 2026)
+19.6%
Nonferrous wire and cable, year over year, August (BLS PPI, NAHB tabulation, September 10, 2026)

If your spring lumber quote didn’t survive to the first draw, you already know the number. NAHB’s July HMI survey put the median material cost increase at 6.7%, same house, year over year. Then sort by size. Builders with five or fewer 2025 starts reported a median increase of 9.1%. Builders with 100 or more starts reported 1.8%.

Same lumber. Same year. A gap of 7.3 percentage points.

NAHB’s own explanation: stockpiling, longer-term supplier contracts, negotiated deferrals. Only the first takes scale. The nationals pay 1.8% because they buy on terms, and terms are a process you can build.

The Size Tax

You’re Paying for the Contract You Never Asked For

Most operators at $1 to $5 million buy job by job. New quote, new price, new terms, every time. The supplier prices that in. Your pay cycle too. A yard that waits 45 days for your check charges you for the wait.

The most common answer was a 5% to 9.99% increase. Another 22.1% saw 10% to 14.99%. If you’re in that second group, your quote from March is short by a whole margin.

Action

This month, ask your top three suppliers by spend for a 90-day locked price on your standard package, in exchange for consolidated volume and 15-day pay. You’re already paying for slow pay. Trade it away.

The Fuel Line

The Cost That Isn’t on Your Estimate Is the One Eating It

The August PPI (BLS, September 10, 2026): building materials excluding energy rose 0.2% on the month and 5.1% on the year. Tame. Energy inputs are up 46.2% from a year ago. No. 2 diesel jumped 17.7% in a single month and 77.7% over the year. Wire and cable climbed 2.4% for the month and 19.6% for the year.

Diesel isn’t a material. So it isn’t a line. It sits in the excavator, the dump fee, and the sub’s mileage. When it rises 78% it shows up as “the job ran over” with nobody’s name on it. Same with copper. Every electrical rough-in quoted before spring is priced wrong.

Action

Add a fuel and delivery line to every estimate over $25,000, priced at this month’s diesel. Put a 30-day validity on any quote carrying copper. A cost with no line has no owner, and a cost with no owner lands in your margin.

BPA: Financial Tracking & Process Review

SBGP analyzes your job costing, estimating process, and gross-profit tracking and builds a step-by-step 12-month plan across Finance and Processes, so you know what the house costs this week, not what it cost when you quoted it.

Access your BPA →

Gross Profit, Weekly

The Number That Catches It in Time

Materials move 0.2% a month. Diesel moved 17.7% in one. A quarterly review finds out in December what a weekly review caught in September. The fix is one number, run every Friday: contract value, minus costs spent to date, minus costs still to spend. Fifteen minutes per job.

Push it down. The project manager brings it to the weekly meeting. When a supplier reprices after contract, that’s a written confirmation within 24 hours and a priced change order within five days. Escalation clauses are worthless if nobody tracked the escalation.

Action

Starting Friday, run gross profit per project on every open job over $50,000 and flag any job where “still to spend” grew more than 3% since contract. Three percent on materials is the whole margin on a thin bid.

Three Plays

Buy Like the Builder Who Pays 1.8%

01

Production & Semi-Custom Builders

Bid one spec package to two suppliers every quarter, with a 90-day lock and 15-day pay. The 1.8% builders buy on contracts, and contracts need a repeatable spec.

Four floor plans means four packages. That’s enough.

02

Remodelers

Reprice allowances against this month’s PPI instead of last year’s catalog: cabinets, flooring, fixtures. Put a 30-day validity on every proposal over $25,000 and re-run the selection-deck numbers at framing-complete.

A six-month kitchen quoted at spring wire prices is a kitchen you’re partly paying for.

03

Trades

Fuel is a line on every ticket. Add stated fuel and travel to every service call and bid, review it monthly against the PPI, and put copper on 30-day validity.

A trade that eats fuel subsidizes the GC’s margin with its own.

The Bottom Line

The Gap Is a Process Problem, and Process Is Cheap

The builder with 100 starts pays the same for a two-by-four. The difference is the contract, the pay cycle, and the Friday number. All three fit inside a $2 million operation. The lumber won’t get cheaper this fall. Your terms can.

What This Environment Rewards
Supplier terms you negotiated
A fuel line on every estimate
Gross profit per job, every Friday
Quotes that expire before the prices do

You’re not paying more for materials. You’re paying for not having a process.

A BPA from SBGP is a 30+ page, step-by-step 12-month plan built specifically around your operation. SBGP analyzes your financials, your marketing and sales process, your hiring and team communication structure, and your strategic positioning, and delivers a personalized, time-based roadmap. If your material costs are running ahead of your quotes, the Finance and Processes sections of your BPA build the tracking and estimating system that closes the gap. DISC Profile and Motivational Assessments for you and up to five members of your management team are included.

✓ Marketing & Sales
✓ Operations
✓ Finance & Tracking
✓ People & Role Clarity

Start Your BPA Today →

Sources: NAHB, “Smaller Builders Report Higher Material Costs,” August 26, 2026 · BLS Producer Price Index, August 2026, NAHB tabulation, September 10, 2026

September 2026
Market Analysis
SBGP