List of construction companies: how many there are, the largest, and how to build your own

This guide is for companies that sell to contractors: construction software, equipment and rental, materials, insurance and bonding, staffing, safety training and fleet services. It explains how many construction companies there are by trade and size, which firms are largest, how contractors buy, and how to build a list of construction companies from free public data instead of buying a directory.

How many construction companies there are

County Business Patterns, the Census Bureau's count of business locations with paid employees, found 814,557 construction establishments in 2023, employing 7.66 million people with an annual payroll of $586.6 billion. It counts locations, not companies, so a contractor with three offices counts three times. It leaves out the self-employed: the Census Bureau's Nonemployer Statistics counted another 2,917,631 construction businesses with no employees in 2023.

Construction splits into three subsectors, and each buys differently. This doubles as a construction services list:

The two biggest single trades are plumbing and HVAC contractors (111,207 establishments) and residential remodelers (135,337). Commercial and institutional general contractors number 39,072.

Size: most construction companies are small

Size decides who you talk to:

The largest construction companies

Searches for the top construction firms or Fortune 500 construction companies want the biggest names. Public companies report audited revenue to the SEC, so these figures are exact. Many of the largest US general contractors are private and don't publish audited revenue, so they don't appear here.

The largest listed homebuilders are bigger still: D.R. Horton reported $34.25 billion for the year to September 2025 and Lennar $34.19 billion for the year to November 2025, followed by PulteGroup ($17.31 billion), Toll Brothers ($10.97 billion) and NVR ($10.32 billion).

A list of giants is a poor prospect list for most sellers. These companies buy through central procurement with long qualification cycles, and they're a few dozen accounts out of 814,557.

How construction companies buy

• Purchases follow work. Contractors buy when they win jobs. A firm with a growing backlog buys equipment, software and people; one with an empty pipeline cuts back. Backlog is the best single buying signal in this industry.
• The field has a veto. A superintendent who won't use your app will kill it, whatever the office signed. Expect a trial on one live project before a company-wide rollout.
• Estimators are influential. Anything that helps a firm bid faster or more accurately gets attention, because bids are how contractors win work.
• Peers matter more than marketing. Contractors ask other contractors. A reference from a firm of similar size and trade carries more weight than any case study.
• Seasons shape the calendar. In most of the country, crews are busiest from spring to autumn. Owners and operations managers have more time to evaluate vendors in winter, when they're also planning next year's equipment and staffing.

Free sources for a list of construction companies

OSHA requires establishments with 20 to 249 employees in construction, and larger establishments in most industries, to file their annual injury summary electronically, and it publishes the filings by establishment. That makes it one of the few free sources that pairs a company name with a headcount. For contractors who do federal work, see selling to the government for registry and contract award data.

Segment the list

• Trade and subsector. A roofing contractor and a highway contractor share almost nothing except the NAICS sector.
• Size. Use OSHA headcounts where available; otherwise treat a firm's license classifications and permit values as a proxy.
• Residential or commercial. Permit types and license classifications usually tell you.
• Recent activity. Permits issued in the last 90 days, a new license classification, or a jump in headcount.
• Union or open shop. It affects hiring, wage rates and which associations a firm belongs to.

Outreach angles that work

Lead with the job, not your product. A permit tells you what a contractor is building, where and roughly how big it is, which gives you a specific, dated opener. Hiring posts for superintendents or estimators signal backlog growth. Keep the first message short: owners read email on a phone, often in a truck. The research for each account (the permits, the trade, the headcount) is the slow part when the list runs to hundreds; Bebop finds matching companies and contacts and writes a playbook for each account.

Worked example: building a list from Chicago permits

Illustrative example. The seller and its plan are fictional; the permit counts come from the City of Chicago's Building Permits dataset for 2025.

The seller: Gantry Schedules (gantry.example) sells scheduling software to commercial general contractors. The goal: a list of general contractors winning sizable new-build work in Chicago.

1. Pull the permits. Chicago issued 1,460 new construction permits in 2025, with $2.99 billion of reported cost. 1,086 of them name a general contractor, and those name 495 distinct firms.
2. Filter for size. 235 permits report a cost of $1 million or more. They name 140 distinct general contractors. (We matched firms on the name as written, so a firm that spelled its name two ways counts twice.)
3. Check headcount. Look each firm up in the OSHA filings. Firms with 20 or more employees are more likely to need scheduling software than a two-person builder.
4. Do the arithmetic. If about 60% of the 140 build commercial projects and pass the headcount check (an illustrative assumption), that's 84 accounts. At an illustrative 10% reply rate to a permit-specific email, 84 accounts give about 8 conversations, enough to test the message before widening the list.
5. Write to the job. Each email names the permit:

Subject: Your [project type] at [street address]

Hi [first name],

I saw [company] pulled the permit for the [project type] at [street address] in [month]. Congratulations on the job.

On a build that size, most GCs I talk to lose time when [specific problem, e.g. a trade slips and the schedule has to be rebuilt by hand].

We help commercial GCs [outcome]. Would a 15-minute look be useful before you're deep into the schedule?

[Your name]
[Phone number]

Common mistakes

• Buying a directory of big names. The firms on published top lists are a tiny share of the market and the hardest to sell to.
• Treating NAICS 23 as one market. Size and trade change who buys and why.
• Ignoring the field. If superintendents won't use it, the office will cancel it.
• Calling in peak season with a long pitch. Keep it short in summer and save evaluations for winter.
• Stale records. Check license status and recent permits before you contact a firm.

Next step: write down which trades, sizes and regions you sell to with the ideal customer profile template, then pull the license and permit records that match it.