New factories being built in the USA: how sellers spot them early

Why this page is not a list of new factories

Search for new factories being built in the USA and you get monthly roundups of announced plants. Good reading, weak prospecting tool, for three reasons.

First, timing. A plant usually makes a list after the announcement, when the site is chosen, the building is spoken for and the big equipment is on order. Vendors with relationships got the call months earlier.

Second, coverage. Lists of announced projects lean toward big plants and big dollar figures. A $2 million expansion at a 180-person shop often never makes the list, and that shop is exactly who buys a maintenance system or a quoting tool.

Third, reliability: an announcement is an intention. Kearney's 2026 Reshoring Index notes that EV and battery makers canceled more projects in Q1 2025 than in the prior two years combined, and that nearly half of the clean tech factories slated to come online in 2025 faced delays or cancellations. A list cannot tell you which new manufacturing plants will actually buy. What happens at the plant, and in what order, can. That is the argument behind manufacturing prospect lists vs buying moments.

How many new factories are being built in the USA right now?

There is no official monthly count of factories under construction. The closest number is what the country spends building them, reported monthly by the Census Bureau. In August 2026, manufacturing construction ran at a seasonally adjusted annual rate of about $170.7 billion (preliminary), down 19.2% from about $211.1 billion a year earlier. The building wave is cooling.

That number has a blind spot. Census counts buildings and structures at manufacturing sites and leaves out production machinery, such as heavy industrial machinery, stamping machines and packaging machines. A plant that adds a shift, a cell or a few machines inside its existing walls barely shows up in it.

Kearney estimates US manufacturing capacity grew only about 1.5% from 2021 to 2025, even as manufacturing capital spending roughly tripled, and it cites a 2025 European Investment Bank survey in which 48% of US manufacturers' investment went to replacement rather than new capacity. In the Philadelphia Fed's September 2026 survey of manufacturers in its region, 42.3% expected capital spending to rise over the next six months and 5.2% expected a drop. In the same survey, 72% said labor supply limited their capacity use at least slightly, up from 50% in June. One regional survey, but that is the plant an automation seller wants: short-staffed and still spending.

One dated fact for new-site sellers: Section 168(n), added by the 2025 One Big Beautiful Bill Act, lets owners fully expense new nonresidential property used in manufacturing, production or refining if construction starts after January 19, 2025 and before January 1, 2029, and the property is in service by January 1, 2031. Some owners will likely time groundbreakings to it. (Not tax advice.)

How a manufacturing plant expansion unfolds, stage by stage

End to end, Clean's research puts a typical expansion inside a working plant at roughly 9 to 18 months and a new plant at roughly 18 to 36. Those are research estimates, and big regulated builds can run longer. The shape matters more: buying windows open one after another, not all at once.

A new site picks almost every system fresh, and software often sits inside one approved project budget instead of fighting for operating money. An expansion at a running plant is narrower. It starts with a bottleneck, goes up as a capital expenditure request, and the software attached to new equipment is often bought after the equipment is running.

Signs a plant is about to expand

No single event proves an expansion, so watch for changes that travel together. Among the accounts in Clean's research that said the most, some had two or more related changes reach one plant in quick succession, a pattern that can point to a project rather than a one-off purchase. Here are the early signs of a factory expansion, in buying-moment terms. All 14 moments are on manufacturing buying signals.

• New equipment investment. Alone, it may be a replacement, and the test in the next section tells the two apart. Paired with another change at the same plant, such as inspection equipment bought alongside a new machine, it starts to look like a line coming up.
• New customer program. It brings new part numbers, new approvals and sometimes more volume than the current lines were sized for, so capacity questions often follow. What the customer will grade the plant on is covered in supplier scorecards.
• First hire in a new function. As rough rules of thumb, a first quality manager tends to appear around 75 to 150 employees, a controller around 100 to 200, a maintenance manager around 150 to 300, and dedicated IT and EHS roles around 250 to 500. Tools for the new function often follow.
• Capacity expansion. A new line, shift or process at a running plant. It is the largest growth moment in Clean's map, with more than 600 catalogued signs.
• New site. A plant or production line being built, bought, leased or commissioned, with more than 390 catalogued signs of its own.
• Supply chain change. Work coming back from overseas, or a key supplier failing, can turn into a capacity or new-site decision later. See what reshoring plants buy.
• Slowdown or distress. The opposite sign: for most sellers, hold off, even if the plant looked like it was growing last quarter.

Replacement or new capacity: the test that changes your pitch

A new machine is not automatically an expansion. In the survey Kearney cites, nearly half of US manufacturers' investment went to replacement. Pitch growth to a plant that just replaced a worn lathe and the plant manager knows you did not look closely.

Clean's research gives a useful test. When a plant takes on a new machine, tooling tends to follow within about 30 days and programming software within about 60. If the machine adds capacity rather than replacing one, the plant often starts hiring an operator or programmer within about 60 to 120 days. If no hire shows up by then, treat the machine as a likely replacement. These are research estimates.

For a replacement, sell the bolt-on to the new asset: its PM schedule, its monitoring, its inspection program. For net-new capacity, sell to the whole new line and the ramp after it, because the plant is about to learn what its current systems cannot handle.

What each seller should do at each stage

Where you enter depends on what you sell. Too early, there is no owner and no budget. Too late, the plant has patched the problem with a spreadsheet and a hot list.

Robotics and automation and manufacturing ERP sellers need to be in before the capex request or project budget is final. MES gets two shots, on a new site or during the ramp. CMMS and machine monitoring win at install and ramp, when new assets have no maintenance history. Quality software and CMMC compliance follow the new customer program, EHS software follows new processes and new people, and industrial AI and quoting software fit at both ends of the build.

Why the ramp beats the announcement

Our view: the best moment for plant software often comes months after the new machine arrives, when the line is running but not yet at full output. So an older expansion is still a live reason to reach out.

Two mechanics explain it, and the first is money. Plants commonly treat equipment purchases above about $5,000 to $10,000 as capital, and a plant manager's own authority often tops out somewhere between $25,000 and $100,000. Above that, a formal capital request goes up the chain. The machine already fought that fight. The fix for a line that is not making rate is often a smaller purchase the plant can approve on its own, which is why the plant manager matters more during the ramp than at the announcement.

The second is the calendar. Many plants schedule major installs and system cutovers into planned shutdowns, usually in summer and over the December holidays, and shutdown planning guides put the scope freeze anywhere from two to four months before the window. A change pitched after the freeze often waits for the next shutdown. The manufacturing buying calendar maps those windows, and how plants buy covers who signs.

How Clean flags plants heading into expansion

Clean tells B2B teams that sell into manufacturing which plants have a real reason to buy and why. It works at the level of the site where the work happens, researching accounts plant by plant, and it records what happens at each plant as a dated history. Across that history runs a temporal graph network, because for an expansion the order and gaps between changes, and the way they link, tell you more than any one event can. A new machine with no hire behind it reads like a replacement. The same machine followed by a second shift and a first maintenance manager reads like a line coming up.

The 14 buying moments Clean uses hold more than 4,000 catalogued early signs, and by Clean's own scoring about 7 in 10 are detailed enough to identify the actual machine, program or deadline. More than 1,200 of those signs tie to growth moments: a new site, capacity expansion, or new investment in equipment and buildings. Clean has also mapped 140+ typical chains that trace how one change at a plant tends to trigger another. Put together, that lets Clean look for the run-up to a plant scaling, so a seller can get to the site while the decision is still open. Often that happens before the company has gone public with anything.

For each plant, the reason to reach out is dated and backed by its evidence, with competing explanations and the signs that would disprove it written alongside. Whatever Clean can't confirm stays labeled unknown. Look-alikes get weeded out too, whether that's a contractor, a repair or service shop or a one-person operation. Some of the plant-level changes in Clean's research sat at sites the company's own website never names, which is why plant-level targeting matters. See how Clean works, then book a demo. Bring your product, and before the call ends Clean will have built you a live list of plants for it. The product page is Clean for manufacturing.