Multi-Trade Integration Benchmark

What this is. Three peer PE-backed mechanical platforms benchmarked at different points in their tuck-in sequence (Grizzly MEP at month 11 / three add-ons; United Building Solutions at month 14 / two add-ons; Service Logic newly acquired by Bain + Mubadala / month 4). Each peer mapped to where the integration debt is showing up. HFI's situation specifically: 20 days past first add-on (Ecofriendly Mechanical), 140 days past platform close, with both fabrication shop and VDC team listed publicly — the part of the operating stack that compounds quickly across multiple portcos.

What it is not. A pitch. Every deal date, sponsor, and add-on sequence is from public PE press releases. The framework — toolchain decisions made between add-on one and add-on three set the 18-month integration cost trajectory — is the kind of analysis HFI's corp-dev team would do internally before evaluating any platform vendor.

key finding

Twenty days ago (April 8, 2026), Harrell-Fish announced its first platform add-on, Ecofriendly Mechanical. Add-on one is the moment the integration playbook stops being theoretical and becomes operational — every decision about fabrication, BIM/VDC, and field-shop coordination made between now and add-on three becomes the default the rest of the platform inherits. The pattern across three peer PE-backed mechanical platforms is that platforms that consolidated early spent materially less than platforms that tried to standardize on the largest portco's existing stack after add-on three. The window where consolidation decisions are cheaper than patches is open now, and it tends to close around add-on two.

where harrell-fish sits today

Status snapshot — April 28, 2026

First add-on	Ecofriendly Mechanical, announced April 8, 2026 (20 days ago)
Platform close	December 9, 2025 (140 days ago) — first platform investment in New State's Fund IV
Sponsor	New State Capital Partners (majority) + Amethyst Capital Group (independent sponsor partner)
HFI capabilities	Mechanical contracting, plumbing, HVAC, fabrication shop, Virtual Design & Construction (VDC)
End markets	Healthcare, education, commercial, industrial, food service
Geography	Bloomington, IN headquarters with multiple Indiana locations
Integration window	Active — first add-on closed less than 30 days ago, integration playbook being written now

The combination of (a) an explicit fabrication shop, (b) an explicit VDC team, and (c) a 20-day-old first add-on means HFI is now actively writing the integration playbook for the next 12-24 months — before integration capital is committed elsewhere.

peer platform comparison

Three peers at three different points in the tuck-in sequence

peer 01 · month 11

Grizzly MEP

Launched

May 2025

Add-ons since launch

Stiles Heating & Cooling (May 2025) — HVAC, building controls, plumbing across GA + SC.

Air Design Systems (July 2025).

Excel Mechanical Contractors (Sep 10, 2025) — full-service mechanical and electrical, Baltimore-based, expanding into D.C., MD, VA.

Trades covered

Mechanical, electrical, plumbing, HVAC, building controls.

Pattern observed

Three add-ons across three states inside 5 months. By month 7 (Excel close), the portfolio had simultaneously absorbed a GA/SC HVAC platform and a Mid-Atlantic mechanical-and-electrical contractor. Public signals — separate brand identities, geographically dispersed shop ops, multi-trade scope — suggest the platform is operating with portco-level toolchain autonomy rather than a consolidated fab/VDC layer.

Where integration debt surfaces

Cross-portco fabrication coordination as the platform pursues federal and tech-sector work, which Grizzly's executive commentary has flagged as a growth target.

peer 02 · month 14

United Building Solutions

Formed

February 2025

Add-ons since formation

Total Comfort Solutions — North Florida HVAC (concurrent with platform formation, Feb 2025).

DFW Mechanical Group (Jan 20, 2026) — full-service commercial and industrial mechanical, plumbing, heating, piping; Wylie, TX.

Trades covered

Commercial HVAC, plumbing, heating, piping. Multi-state footprint now spanning Northeastern, Southeastern, and South-Central US.

Pattern observed

Two add-ons in 12 months. The DFW Mechanical add-on continues operating as a UBS division under DFW's existing president, Brett Thomas. This is the "operate as-is" path — geographically and operationally distinct portcos with brand and leadership preserved.

Where integration debt surfaces

Multi-state estimating, fabrication scheduling, and BIM standards as UBS pursues larger commercial and industrial scopes that span the three regional footprints. Maintaining three separate operational stacks works for service work; new-construction project pursuit at scale tends to expose coordination gaps.

peer 03 · month 4

Service Logic

Acquired

December 2025 — same vintage as Harrell-Fish

Profile at acquisition

Largest privately-held commercial HVAC and mechanical services platform in North America. Charlotte, NC HQ. 140+ locations, 5,000+ technicians. Preventative maintenance, emergency service, equipment replacement, retrofit, building automation.

Trades covered

Commercial HVAC, mechanical services, building automation, energy solutions.

Pattern observed

Bain + Mubadala acquired a mature, already-consolidated platform. The integration question isn't "consolidate the operating companies" — it's "what does the next-tier acquisition strategy look like under new ownership." A different integration shape from HFI's: less about consolidating disparate stacks, more about tooling the platform for the next 18 months of bolt-on acquisitions.

Where integration debt surfaces

Onboarding velocity for future tuck-ins. A platform with 140 locations and 5,000 technicians needs a templatized onboarding stack — fabrication standards, service-management tooling, BIM/VDC requirements, ERP integration — or every new acquisition becomes a multi-quarter integration project.

what this means for harrell-fish

Three observations specific to HFI's situation

HFI is the only platform of the four with both an explicit fabrication shop AND an explicit VDC team

That's a meaningful capability advantage in mid-market mechanical, and it's also the part of the operating stack that compounds quickly across multiple portcos. The fab and VDC standards HFI sets in months 4 through 9 will be inherited by every future tuck-in. The Grizzly and UBS pattern of operating each portco on its own toolchain works for an HVAC service rollup; for a mechanical-construction platform with prefab capability, the math typically reverses by the third add-on.

The Ecofriendly add-on is a relatively low-stakes integration test, and it just closed

Both companies are Bloomington-headquartered and Ecofriendly is HVAC-focused. That makes it a lower-friction first integration than a multi-state mechanical add-on would be — and the 20-day-old close means the operational handoff is happening right now. The window to use this add-on as a deliberate stress test of the integration playbook — fab handoff, VDC standards, project handoff between operating units — closes once the next add-on enters diligence, typically 4-8 months out.

The healthcare and education end-market profile concentrates HFI in the high-coordination project type

Hospitals and university buildings carry the highest BIM-coordination requirements in mid-market commercial. That's a tailwind for HFI's existing VDC investment and a structural reason the fab/BIM consolidation question matters more for HFI than for a service-rollup platform.

recommendations

Three actions, vendor-neutral, executable now

Document the current fab-and-VDC handoff sequence at HFI before Ecofriendly integration is complete

The current process at HFI, written down at this level of detail, becomes the default the next add-on inherits. The cost of writing it down while Ecofriendly is freshly integrating is meaningfully lower than after add-on three — and the absence of a written standard is the single most common reason multi-trade platforms run into project-handoff friction by add-on three.

Run a "what does add-on three look like?" exercise now, before add-on two enters diligence

Almost all of the integration debt visible across Grizzly, UBS, and Service Logic peers shows up after the third add-on, not the first. The decisions that compound — toolchain standardization, BIM standards, ERP and project-management consolidation — are cheaper to make as constraints on the second add-on than as patches after the third. Use the next 60 days, while Ecofriendly is fresh, to write the technical due-diligence checklist HFI will use on add-on candidates two and three.

Treat platform-stage decisions on fab software and VDC tooling as 18-month decisions, not portco-by-portco

Service Logic's challenge is now templatizing onboarding for the next 18 months of M&A. UBS's challenge is sequencing multi-state coordination. Grizzly's challenge is cross-portco operational consistency. HFI's choice in the next 90 days about whether to standardize fab and VDC at the platform level (one stack across HFI + Ecofriendly + future add-ons) or portco level (each acquired company keeps its existing tools) will set the default for every future tuck-in. Make it deliberately, not by drift.