Custom Home Builder Profit Margin: 2026 Benchmarks

Somebody told you 10% is standard. Somebody else said 20%. Your accountant said last year was fine.

None of that tells you whether you're getting paid what the work is worth.

We wanted to pull together objective metrics you can use to benchmark how your business is doing in today’s market: what the average custom home builder profit margin actually is, how it's moved over twenty years, where the money goes on a typical home, and the markup math that quietly costs builders the most.

Every industry figure here comes from NAHB with the source linked. Let’s get into it.

What is the average custom home builder profit margin?

The average home builder ran a 20.7% gross profit margin and an 8.7% net profit margin in fiscal year 2023, according to NAHB's Cost of Doing Business Study. That net margin is the strongest in a generation. NAHB reports it was the highest in more than three decades, second only to a 10% peak in 1991. That gross margin is the highest it’s been since 2006.

The average builder in that study did $11.3 million in revenue. Cost of sales ate 79.3% of it. Operating expenses took another 12.0%.

So on a $1 million house, the average builder keeps about $207,000 after direct costs, and about $87,000 after running the company.

Gross margin vs net margin: which number are you talking about?

Gross profit margin is revenue minus the cost of building the house, divided by revenue. Net profit margin is what's left after company overhead (e.g. office, insurance, salaries, marketing) divided by revenue. Gross margin measures the job. Net margin measures the business.

Most arguments about builder profit margin are two people using different words. A builder saying "I run 20%" usually means gross. A builder saying "I made 8% last year" usually means net.

The gap between the two is your overhead. In 2023, that gap was 12 points.

Builder profit margins by year

Builder margins move with the housing cycle, and they move hard. Here's NAHB's Cost of Doing Business series at five points over two decades.

Sources: NAHB, Builders' Profit Margins Improved in 2023 and NAHB, Builders' Profit Margins Fall as Balance Sheets Grow

Two things stand out. The 2008 net margin was negative as builders lost three cents on every dollar. And the 2023 gross margin still sat a tenth of a point below 2006, seventeen years and one housing collapse later. Builders got more profitable at the net line by running leaner, not by charging more.

NAHB also cautioned that mortgage rate buydowns and price cuts likely squeezed the margin back down in 2024, so treat 20.7% as a good year.

Where the money goes on an average new home

NAHB's Cost of Constructing a Home survey breaks the sale price of a new single-family home into its parts. For 2024, on an average sale price of $665,298:

Source: NAHB, Cost of Constructing a Home, 2024

Construction cost averaged about $162 per square foot, the highest in the history of the series.

Run the math on those percentages and the areas where this goes wrong show up fast. Construction cost on that average home is roughly $428,000. Builder's profit is roughly $73,000. A 5% overun on construction cost is about $21,000. That’s nearly 30% of the profit on a fixed-price house, gone, on a miss most builders wouldn't notice until the last draw.

A friendly reminder for the importance of job costing!

Margin vs markup: the mistake that costs the most

Margin is profit divided by the price. Markup is profit divided by the cost.

Add 20% markup to a $500,000 job cost and you get a $600,000 price. Your profit is $100,000. Divide that by the $600,000 price and your margin is 16.7%, not 20%.

Here's what markup you need to hit a given margin:

The formula: markup = margin ÷ (1 − margin).

Check which one your estimating template applies. Plenty of builders have run a 20% markup for years believing it was a 20% margin, and given up more than three points on every house.

What's a good custom home builder profit margin?

NAHB doesn't publish a target, only an average: 20.7% gross and 8.7% net in 2023. Working back from that, a custom builder aiming to beat the average is looking at roughly 18% to 25% gross and 8% to 12% net. Below 15% gross, a single trade overrun wipes out the job. Where you land inside that range depends on your contract type, your overhead, and how much of the work you self-perform.

Cost plus. You bill actual cost plus a fee. The fee is your margin, so it has to carry overhead and profit both. A 15% fee sounds generous until you subtract 12 points of overhead. And your cost records are the invoice so sloppy job costing could show up as an argument with the client.

Fixed price. You carry the overrun risk, so you should carry more margin. A fixed price bid priced at cost-plus margins is a bet you win until the first bad job.

Overhead is the other half. Two builders at 20% gross end up in different places if one runs 10% overhead and the other runs 15%. Know your overhead rate before you argue about margin.

For a sanity check on what disciplined businesses can do: NAHB found remodelers averaged a 29.9% gross and 6.3% net margin in 2024. Much fatter gross, thinner net. Smaller jobs, more overhead per dollar of revenue.

Why builder profit margins decline

We see margins for custom builds slip in five common places.

1. Estimating from square footage. A per-square-foot rule of thumb is a guess dressed up as a number. Your last ten jobs, coded by trade, are the only estimate data that means anything.
2. Unpriced change orders. Work that starts before the change order is signed is work you may eat. Every one of them, in writing, before anybody swings a hammer.
3. Allowance overages that never get billed. The client picks $19,000 of lighting against a $12,000 allowance and nobody sends the invoice. That's $7,000 straight off the margin.
4. Labor burden left out. Payroll taxes, workers' comp, insurance, benefits. Cost your crew at the bare wage and self-performed work looks cheaper than it is.
5. Finding overruns late. An overrun caught at 30% complete can be traded against another code. The same overrun caught at closing is a number you write down.

How Ressio protects the profit margin you priced

Margin gets set in the estimate and lost in the field. Ressio keeps both on the same numbers, so the gap shows up while the job is still running.

Ressio's estimating calculates builder cost, markup, and customer price from quantity and unit cost on every line. You can apply the builder fee at the item level or across the whole project, and split cost types into labor, materials, and other. So the markup-versus-margin question gets answered once, in the template, instead of per bid in a spreadsheet.

Lock the estimate and it becomes the budget baseline. Every cost code then carries original, approved, revised, committed, and applied costs side by side:

• Committed counts approved purchase orders and accepted bids, so money you've promised is visible before the bill arrives.
• Applied updates as bills and time entries post.
• Variance shows per code, and you can click into a code to see the individual bills, time entries, and POs behind it.

Change orders come off estimate line items and move the baseline when they're approved, which keeps the variance column honest as scope grows. Selections and approvals track against that same structure, so an allowance overage is a priced approval instead of a surprise at closeout.

Costs and bills sync with QuickBooks Online, so your bookkeeper codes a bill once and the job budget reflects it. Most builders finish the cost code mapping in under 30 minutes.

None of that raises your margin on its own. It tells you which house is losing margin while you can still do something about it.

Frequently asked questions

What is a good profit margin for a home builder?

NAHB's Cost of Doing Business Study put the industry average at 20.7% gross and 8.7% net profit margin for 2023. A builder aiming to beat that average is looking at roughly 18% to 25% gross and 8% to 12% net. Custom builders on fixed-price contracts should sit at the higher end, because they carry the overrun risk.

How much profit does a builder make on a house?

NAHB's 2024 construction cost survey put the builder's profit at 11.0% of the sale price on an average new single-family home selling for $665,298 — roughly $73,000 per house. That's before company overhead and taxes. Net profit across all of a builder's jobs averaged 8.7% of revenue in 2023.

What's the difference between margin and markup in construction?

Margin is profit divided by the sale price. Markup is profit divided by the cost. A 20% markup produces a 16.7% margin, not 20%. To hit a 20% gross margin you need a 25% markup. The formula is markup = margin ÷ (1 − margin).

Is 10% a good profit margin for a custom home builder?

A 10% gross margin is thin for a custom builder and leaves almost nothing after overhead, which averaged 12% of revenue in NAHB's 2023 data. As a net margin, 10% is strong — better than the 8.7% industry average. Which one you mean changes the answer, so always say gross or net.

What profit margin should I use on a cost-plus contract?

On cost plus, the fee is the margin, so it has to cover overhead and profit. There's no published benchmark for the fee, so work it out from your own numbers: your overhead rate plus the profit you want. Operating expenses averaged 12.0% of revenue for builders in 2023, which means a fee much below that is funding the client's house out of your company. Price the fee under your overhead rate and volume makes the loss bigger, not smaller.

How do I calculate my own profit margin?

Gross margin is contract value minus total job cost, divided by contract value. Net margin is company revenue minus all costs including overhead, divided by revenue. Both need job costs tracked by cost code to be worth anything — a total with no breakdown tells you the number without telling you what to change.

Want to know your margin on Tuesday instead of at closing? Book a Ressio demo and see budget, committed, and actual on every job in one place.