Commercial Expansion
When commercial work makes sense, how to get started, and what changes when the customer is a building manager instead of a homeowner.
Commercial vs Residential — Key Differences
| Factor | Residential | Commercial |
|---|---|---|
| Equipment | Split systems, 1-5 tons | RTUs, chillers, VRF, 5-100+ tons |
| Jobs per day | 4-6 service calls per tech | Often one project per tech for days |
| Customer | Homeowner (direct) | Facility/property manager (B2B) |
| Payment | Collect on completion | Net-30, Net-45, Net-60 with retainage |
| Contracts | $149-$399/yr agreements | $3,000-$50,000+/yr PM contracts |
| Sales cycle | Same-day to 1 week | Weeks to months, formal bid process |
| Insurance | $1M GL typical | $2M-$5M GL often required |
| Documentation | Work order + invoice | Submittals, closeout packages, daily logs |
Source: FieldPulse, Wexford Insurance
Margin Comparison
| Job category | Gross margin | Net margin |
|---|---|---|
| Residential service/repair | 50-65% | 15-25% |
| Residential installation | 35-50% | 10-20% |
| Maintenance agreements (residential) | 40-60% | 20-35% |
| Commercial installation | 25-40% | 8-15% |
| Commercial service | 40-55% | 10-20% |
| Commercial PM contracts | 35-55% | 15-25% |
| New construction | 20-30% | 5-10% |
Source: FieldCamp, Profitability Partners, Oryx-Horn
Florida Licensing — Class A vs Class B
| License | System limits | Commercial capability |
|---|---|---|
| Class A (Unlimited) | No limits — any size | Full commercial + residential |
| Class B (Limited) | Cooling under 25 tons, heating under 500K BTU | Residential + light commercial only |
Most strip mall and small office RTUs are 5-15 tons — fine under Class B. Larger commercial projects require Class A.
Source: FL DBPR, Gold Coast Schools
Where to Start — Easiest Entry Points
Commercial work usually enters organically around $1M-$2M when existing residential customers also own commercial properties.
Light commercial (Class B compatible)
- Small retail spaces, restaurants — 3-5 ton units, similar to residential
- Strip malls — multiple RTUs, 5-15 tons each
- Small offices under 10,000 sq ft
- Churches, daycares, small medical offices
The property manager relationship
Property management companies are the gateway to consistent commercial work. A single PM company can provide 10-50+ annual service calls and 5-20+ PM contracts.
- Meet in person — contract discussions and property walkthroughs build trust faster than email
- Response time is everything — PMs judge on speed more than price
- Documentation quality signals competence — professional reports, photo documentation, clear recommendations
- After-hours availability — PMs need contractors who answer at night
- Fair pricing, not lowest — they want reliable quality, not the cheapest bid that leads to callbacks
- Insurance compliance — have certificates ready with correct additional-insured language
Source: TenantCloud, VendorAccess
Commercial PM Contract Structure
Commercial maintenance contracts are structured differently from residential agreements:
| Factor | Residential | Commercial |
|---|---|---|
| Annual value | $149-$399 | $3,000-$50,000+ |
| Payment | Annual auto-bill | Net-30 invoicing |
| Equipment schedule | By address | Detailed asset inventory with serial numbers |
| Response SLAs | Priority scheduling | Documented windows (2-4hr critical, 4-8hr reduced) |
| Exclusions | Standard list | Extensive — crane costs, permits, hazmat, subcontractor work |
| Insurance | Standard GL | Additional insured endorsements, waiver of subrogation |
One 10-unit strip mall at $150/unit/quarter generates $6,000 annually in scheduled, recurring work.
Commercial PM Checklist — RTUs and General
| Frequency | Tasks |
|---|---|
| Monthly | Clean or replace air filters. Verify thermostat settings and operation. Listen for unusual sounds. Check airflow at vents and registers. Clear condensate drain lines. Visual inspection of unit condition, panels, and guards. |
| Quarterly | Clean condenser and evaporator coils. Check refrigerant levels and inspect for leaks. Inspect and tighten electrical connections. Lubricate motors, bearings, and moving parts. Check ductwork airflow and remove blockages. Inspect belts and pulleys for wear and tension. Test safety controls and switches. |
| Spring/Summer | Clean cooling coils and inspect all cooling components. Verify refrigerant charge. Inspect indoor and outdoor units. Check economizer function. Calibrate thermostat for cooling mode. Clear debris around outdoor units. |
| Fall/Winter | Inspect heat exchangers for cracks or corrosion. Test burners, ignition systems, and gas pressure. Conduct flue system inspection. Verify heat pump defrost cycles. Check heat tape and freeze protection. Calibrate thermostat for heating mode. |
| Annual | Full system performance evaluation under peak conditions. Deep component cleaning. Control calibration and thermostat verification. Ductwork inspection for leaks and damage. Complete electrical connection audit. Gas system leak testing. Record all deficiencies and obtain approval for repair work. |
Source: MaintainX, Trillium Facility
Commercial Bidding
Types of solicitations
| Type | How it works | Typical for |
|---|---|---|
| Invitation to Bid (ITB) | Lowest price wins | Government, schools |
| Request for Qualifications (RFQ) | Qualifications first, pricing second | Complex commercial |
| Request for Proposals (RFP) | Best value — quals + approach + price | Property management, large commercial |
| Negotiated / Design-Build | Direct negotiation | Repeat clients, tenant improvements |
Target margins by project type
| Project type | Target net margin |
|---|---|
| Competitive bid | 8-15% |
| Design-build / negotiated | 12-20% |
| Government (prevailing wage) | 10-18% |
| Service agreements | 40-60% gross |
| Emergency / T&M | 25-40% |
Source: FieldCamp, Simpro, PlanHub
Bid/no-bid decision
Before investing 40+ hours in an estimate, evaluate: Is it in your capability range? Do you have the workforce? Is the timeline realistic? Is the customer creditworthy? Is the win probability above 20%? Below 20%, skip it.
The Revenue Reality Check
Commercial is not automatically more profitable. Gross margins run 5-15 points lower than residential service. Payment cycles tie up cash for 30-60 days. Administrative overhead is significantly higher. Insurance costs increase. Equipment investment is required.
Commercial is still worth pursuing. Revenue per contract is much larger ($3K-$50K+ vs $149-$399 residential). PM contracts provide recurring, predictable revenue with less churn than residential. Commercial fills shoulder-season capacity. It diversifies revenue away from weather-dependent residential demand. And PE buyers value commercial contracts at exit.
The right approach for a $2M residential company: Add commercial as a complement, not a replacement. Start with light commercial (strip malls, small offices) that existing equipment can handle. Don't chase large projects until the residential operation is systemized and profitable — adding commercial complexity to a poorly-run residential company makes both worse.
How to Add Commercial (4 Phases)
| Phase | Timeline | Key actions |
|---|---|---|
| 1. Preparation | Months 1-3 | Verify Class A vs Class B license limits. Audit equipment against commercial requirements. Train one lead installer on RTU/VAV systems. Develop commercial pricing (3-5x admin hours vs residential). Research commercial GL requirements ($2M-$5M limits common). |
| 2. Infrastructure | Months 3-6 | Invest in 2-3 critical equipment pieces (lifts, high-capacity recovery). Build project management templates (submittals, closeout packages). Establish crew leadership. Secure commercial-adequate insurance with required endorsements. |
| 3. Entry | Months 6-12 | Bid smaller projects ($15K-$50K range). Target 2-3 property management relationships. Pursue PM contracts for strip malls and small offices. Refine scheduling for multi-day projects. |
| 4. Scale | Year 2+ | Pursue larger contracts ($50K-$200K+). Build specialized commercial crews if volume justifies. Add BMS/controls capability if entering larger commercial. |
Source: Wexford Insurance
Common mistakes when adding commercial
- Using residential pricing logic — commercial requires 3-5x administrative hours (documentation, submittals, coordination). Contractors who don't account for this underbid consistently.
- Assuming residential techs can handle commercial — RTU, VRF, controls, and blueprint reading require additional training. Cross-train before taking contracts.
- Not planning for extended payment cycles — Net-45/60 with 5-10% retainage can lock up 20-30% of monthly revenue. Establish a separate working capital line.
- Insurance underestimation — Commercial clients require $2M-$5M+ GL, additional insured endorsements, primary/noncontributory wording, and waiver of subrogation.
- Scheduling commercial like residential — Commercial requires exact start times, multi-trade coordination, after-hours work, and multi-day windows.
- Underestimating documentation — Submittals, closeout packages, daily logs, inspection coordination are all required and billable time.
- Taking too-large projects too soon — Start with $15K-$50K jobs before pursuing $100K+ projects.
Source: Wexford Insurance
Sources (7)
- FieldPulse — commercial vs residential HVAC comparison
- Wexford Insurance — scaling from residential to commercial
- FieldCamp — HVAC profit margins by job type
- Profitability Partners — margins from real P&Ls
- TenantCloud, VendorAccess — property manager relationships
- FL DBPR, Gold Coast Schools — Class A vs B licensing
- PlanHub, ConstructionBids.AI — bidding strategies