For the better part of four years, owners in HVAC, mechanical, and building controls heard the same story on repeat. Private equity is rolling up the space. Platforms are buying everything that moves. If you own a decent business in this industry, someone will want you.
From 2019 through 2023, that story was mostly true. Platforms were underwriting add-ons fast, sometimes in weeks, because the capital was cheap and the thesis was simple: more revenue under one roof meant a bigger exit multiple down the line. Speed was the advantage. Diligence was lighter. Strategic fit mattered less than square footage and EBITDA.
That era is over. The underwriting has tightened, the appetite for add-ons has narrowed, and the assumption a lot of owners have been quietly banking their exit on, that a platform will want them, needs a hard second look.
The Old Narrative Owners Are Still Operating On
Ask most owner-operators in this space how they plan to exit, and a lot of them will describe some version of the same plan. Stay in it another few years, keep growing, and eventually a platform will call. It is not an unreasonable plan on its face. It was built on real behavior. PE-backed platforms really were buying aggressively during that window, and a lot of owners watched competitors get acquired and assumed they were next in line.
The problem is that plan was built on a market condition, not a permanent feature of the industry. Interest rates were low. Debt was cheap. Platforms were incentivized to add revenue quickly because the multiple arbitrage math worked in almost any direction. None of that required a platform to be especially selective about who they bought. That is not the environment right now.
What Changed: Fit Over Size
Add-ons today are being evaluated the way platform companies should have been evaluating them the whole time. Not "does this add revenue" but "does this add the right revenue, in the right geography, with the right customer base, run by a team that can integrate cleanly." Strategic fit has replaced speed as the filter.
That shows up in a few concrete ways in how deals are actually getting underwritten:
- Geographic overlap or expansion logic matters more. A platform is less interested in a business two states away from anything they already operate unless there is a specific reason to be there.
- Customer mix gets scrutinized earlier. A book of business that looks like the platform's existing customers is worth more than one that simply adds top-line revenue.
- Management depth is a bigger factor than it used to be. Platforms integrating multiple add-ons at once do not have the bandwidth to run a business that cannot function without its owner. That gets priced, or it gets passed on.
- Recurring revenue carries more weight relative to project revenue than it did three years ago. A predictable service base is easier to underwrite than a lumpy project pipeline, and platforms are pricing that difference more explicitly now.
None of this means platforms stopped buying. It means they got more specific about what they are buying, and the businesses that do not fit that specificity are getting passed on, not because they are bad businesses, but because they are the wrong add-on for that particular platform at that particular time.
The Assumption Owners Need to Retire
Here is where this gets uncomfortable for a lot of owners. If your exit plan has been "a platform will want me" without a defined process behind it, you are not wrong that platforms exist and are buying. You are wrong about the leverage that gives you.
Platform interest is not the same thing as a competitive process. A single platform expressing interest, even real interest, tells you almost nothing about what your business is actually worth. It tells you one buyer with one thesis thinks you might fit. That is a conversation, not an outcome. Without other buyers at the table, that platform sets the terms, the timeline, and the price, because there is nothing pushing against them.
Owners who have been approached directly by a platform sometimes read that inbound interest as validation that they do not need a formal process. In practice, it is usually the opposite signal. It means now is the time to find out if that interest is one option among several, or the only option you have.
The Reframe: Clean Businesses Still Transact Well
None of this is a case for alarm. Businesses with clean financials, documented processes, a management layer that does not depend entirely on the owner, and a customer base that looks institutional rather than personal are still transacting, and transacting well. The fundamentals that made a business attractive in 2021 still make it attractive now. What changed is how much slack there is in the process to cover for a business that has not done that work.
In 2021, a platform might have bought a business with owner reliance issues and figured they would deal with it post-close. In 2026, that same issue is more likely to show up as a lower offer, a heavier earnout, or a pass altogether. The margin for error shrank. The businesses that were always going to command a strong multiple still will. The businesses that were relying on buyer enthusiasm to paper over gaps are the ones feeling the shift.
The Bottom Line
Platform interest is not leverage. A competitive process is leverage. Those are not the same thing, and the gap between them is where a lot of value gets left on the table.
A defined sell-side process puts more than one platform's thesis in front of your business at the same time. It creates the tension that produces a real market price instead of one buyer's opening number. And it lets you find out, before you are committed to anything, whether the interest you have been counting on is actually competitive or just convenient.
If a platform has reached out to you directly, or if you have been operating on the assumption that one eventually will, it is worth finding out what your business actually looks like to the market right now, not just to the one buyer who happened to call.