AEC M&A: The 2025–2027 Window

Construction M&A hit a new record in 2025. Deal volume reached 562 transactions, up 18% year-over-year, and for the first time, private equity buyers overtook strategic acquirers, accounting for 54% of all deals. Behind those numbers is a structural story that has been building for years and is now reaching an inflection point.

Our full report, AEC M&A: The 2025–2027 Window, examines the forces shaping construction mergers and acquisitions over the next 18–24 months, with a focus on the lower middle market. What follows is a summary of the key findings.

A $16 Trillion Industry, Still Radically Fragmented

The global AEC industry represents $16.3 trillion in annual output. In the U.S., roughly $2 trillion is put in place each year across residential, commercial, infrastructure, and industrial segments. No single firm controls more than 2% of the domestic market.

That fragmentation is the structural foundation for M&A. There are thousands of owner-operated businesses in the $5M–$50M revenue range with no natural consolidator, limited succession options, and growing pressure from rising material costs, labor scarcity, and technological complexity. For acquirers, it is an extraordinarily target-rich environment.

What's Driving the Wave

Four forces are converging to create what we believe is the most favorable construction M&A environment in a decade.

Infrastructure spending. Data center construction spending rose 139% year-over-year to $53.7 billion in 2025. The IIJA and IRA continue to fund power grid, water, and transportation projects at historic levels. For construction firms, revenue and backlogs are at or near cyclical peaks—creating the strongest seller positioning in years.

Labor scarcity. Over 80% of contractors reported difficulty hiring in 2025. The industry faces 439,000 unfilled positions. Acquiring skilled workforces through M&A has become a primary strategy for growing firms, and firms with stable, licensed labor forces command meaningfully higher valuations.

PE capital deployment. Construction is now the top-ranked industry for PE platform investments in North America. The buy-and-build thesis is proven: acquire a platform at 4–5× EBITDA, bolt on smaller firms at 2–4×, build to scale, and exit at 7–10×+ to a strategic or larger sponsor. Sixty-eight new PE platforms were formed in 2025 alone.

The ownership transition wave. Roughly 10,000 baby boomers reach retirement age every day. Over half of small business owners have no succession plan. In construction—where the founder is often the license holder, primary client relationship, and operational backbone—the urgency is acute. Owners selling into strong backlogs and favorable tax windows capture maximum value.

The strategic question is not whether the M&A wave is coming—it is already here. The question is whether owners are positioned to act while conditions are most favorable.

The Acquisitive Outperformers

Our analysis of ten publicly traded construction services companies reveals a striking pattern: the most acquisitive firms have dramatically outperformed. Comfort Systems USA, which has made M&A central to its strategy, delivered a 48% annualized stock price CAGR over the last decade. Quanta Services returned 36% annualized. EMCOR delivered 33%. Sterling Infrastructure, which grew largely organically, posted the highest CAGR at 58%—but on a much smaller revenue base.

The message for private company owners is clear. Public acquirers are paying premium multiples because their shareholders reward growth through acquisition. The arbitrage between public valuations (averaging 9.4× EBITDA for construction and engineering firms) and private transaction multiples (averaging 2.6× over the past five years) remains one of the widest in any industry.

Valuations: What Actually Drives the Multiple

Private construction companies trade between 2.0× and 5.0× EBITDA as a baseline—but the true dispersion is much wider. A residential home builder doing project-only work might trade at 2.0×. A data center MEP contractor with a 14-month funded backlog and 40% service revenue might command 6.0×+.

The report identifies seven factors that most influence the multiple, ranked by impact.

Funded backlog is the single most important driver. Buyers distinguish funded contracts (signed, money committed) from pipeline opportunities, and only funded backlog receives full credit. A 12–18 month funded backlog signals predictability and reduces buyer risk.

Revenue quality separates companies within the same subsector. Recurring service and maintenance revenue commands 1.5–2.0× the multiple of project-only revenue. The optimal blend for most specialty contractors is roughly 60/40 project-to-service.

Owner dependence is the most common discount in the lower middle market. A strong second-in-command and transferable processes can add 1.0× or more to a multiple. Firms where the founder is the lead estimator, primary client holder, and sole check-signer face the steepest discounts.

Other factors—labor stability, customer diversification, end-market exposure, and margin consistency—all contribute, but backlog, revenue quality, and management depth account for the majority of within-subsector variation.

The report also covers quality of earnings analysis, bonding capacity as a valuation lever, and deal structure mechanics (rollover equity, earnouts, working capital true-ups) that determine how much of a headline multiple actually translates to day-one cash.

AI and Construction Technology

Construction technology funding reached $4.4 billion in Q3 2025, up 66% year-over-year, with AI-enabled platforms capturing 77% of all investment. The global AI-in-construction market is projected to reach $8.6 billion by 2031.

We see four technology categories reshaping the M&A landscape.

Digital twins and BIM. The digital twin market is projected to grow from $64.9 billion to $155 billion by 2030 at a 19% CAGR. BIM adoption has reached 74% globally, with 41+ countries mandating BIM Level 2+. Firms with digital twin capability are building recurring post-construction revenue streams—lifecycle monitoring, predictive maintenance—that fundamentally change their valuation profile.

Drones and autonomous site intelligence. DroneDeploy received the first nationwide FAA beyond-visual-line-of-sight waiver in January 2025, enabling fully autonomous site monitoring without human spotters. Enterprise contractors like Turner Construction are running nightly drone inspections as standard practice. Drone capability is becoming a baseline expectation for mid-market firms.

Modular and industrialized construction. The global offsite construction market is valued at $172 billion and growing, with modular segments projected to reach $175.6 billion by 2034. For PE acquirers, modular firms are attractive because they exhibit manufacturing economics—recurring production, predictable unit costs, capacity that scales with capital rather than labor.

The productivity imperative. Construction labor productivity has been flat for 50+ years, making it the least digitized major industry. AI is the first technology wave that addresses root causes simultaneously: automating preconstruction, deploying computer vision for inspections, using predictive analytics for schedule slippages, and operating autonomous equipment in labor-scarce environments.

The 2025–2027 Window

Three dynamics make this period distinctive.

First, seller supply and buyer demand are converging. Boomer retirements are peaking at the same time PE deployment is accelerating. This simultaneous pressure on both sides of the market is historically unusual.

Second, the infrastructure spending cycle has a shelf life. IIJA and IRA dollars are still flowing, and construction company financials look as strong as they are going to look. Owners who wait risk selling on the downside of the spending cycle.

Third, technology is becoming a valuation lever. The gap between tech-ready and tech-lagging firms is widening. Firms that invest in digital readiness now will be better positioned for both organic performance and M&A outcomes.

For specialty contractors in the lower middle market, the window is open. The convergence of favorable valuations, demographic urgency, infrastructure tailwinds, and PE capital creates conditions that are unlikely to repeat in this combination. The firms and advisors who act with preparation—clean financials, strong backlog documentation, reduced owner dependence, and a clear technology roadmap—will capture the most value.

This article summarizes findings from "AEC M&A: The 2025–2027 Window," a MaTrx Research & Advisory report published March 2026. The full report is available upon request. This material is provided for informational purposes only and does not constitute investment, legal, or tax advice.