If you're shopping home service franchises in 2026, you've narrowed it down to the two biggest categories: HVAC or plumbing.

Both are recession-resistant. Both have aging infrastructure tailwinds. Both let you skip the FDD comparison theater on franchises that don't matter.

But they're not the same business. The margins are different, the work mix is different, and the path to a $1M+ unit looks completely different.

Here's the honest 2026 breakdown — using real FDD numbers from the biggest brands in each category.

1. Startup Cost: Plumbing Wins by a Hair

HVAC franchise (One Hour Heating & Air):

New build: $143,273 – $286,702
Conversion: $84,570 – $204,824
Franchise fee: $43,000
Royalty: 6% of gross revenue ($1,500/mo minimum)

Plumbing franchise (Benjamin Franklin Plumbing):

Total investment: $132,300 – $1,293,900
Franchise fee: $43,000
Royalty: 6% of gross revenue ($1,500/mo minimum)
Brand fund: up to 4%

Mr. Rooter Plumbing runs lighter at $122,303 – $263,800 with the same 6% royalty plus 2% ad fund.

Verdict: Roughly identical entry points. Plumbing edges out by $10K–$20K on the low end, but it's not enough to drive a decision.

2. Revenue Per Unit: HVAC Pulls Ahead — Hard

This is where the gap opens up.

One Hour Heating & Air: average gross revenue $3.83 million per franchisee (2024 FDD)
Benjamin Franklin Plumbing: average gross revenue $893,678 per territory
Mr. Rooter Plumbing: AUV of roughly $1.75 million

HVAC franchisees pull 2–4x the top-line revenue of plumbing franchisees, on roughly the same investment. The reason: installs. A full HVAC system replacement runs $8,000–$15,000 per job. Plumbing tickets are smaller and more frequent.

Don't get distracted by per-territory vs per-franchisee figures — One Hour franchisees often own multiple territories, but even adjusted, the revenue advantage is real.

3. Profit Margin: Plumbing Quietly Wins

Higher revenue doesn't mean higher take-home.

HVAC net profit margin (2026): 8–12% for healthy operators, 5–10% industry average
Plumbing net profit margin (2026): 13–17% on average — typically 5–10 points higher than HVAC

Why? Plumbing is service-heavy. HVAC is install-heavy. Service work runs 50–65% gross margins. Installs run 35–50%. That gap compounds at the bottom line.

A $1M plumbing shop at 15% nets $150K. A $1M HVAC shop at 9% nets $90K. Run that math on real franchise revenue and the income picture shifts.

4. Owner Income: It's a Wash (With a Twist)

Both categories produce average franchise owner incomes in the $80K–$150K range for single-unit operators, with multi-unit operators clearing $250K+.

The twist: HVAC scales faster. Bigger ticket sizes mean fewer jobs needed to hit revenue milestones. Plumbing scales steadier — more volume, more recurring service plans, less seasonality risk.

If you want a bigger top-line empire to sell in 10 years, HVAC. If you want a leaner, more predictable cash machine, plumbing.

5. The Honest Truth Nobody Tells You

Both categories are hammered by the same problem: labor.

Finding licensed HVAC techs and plumbers is the actual bottleneck — not capital, not customers. Plumbing licensing is generally stricter and slower, which is partly why margins are higher. HVAC has more training pathways, which means easier hiring but also more competition for talent.

If you can't recruit, neither model works. Period.

Bottom Line

Pick HVAC if: You want higher gross revenue, faster scale, and you're confident you can manage install-heavy operations and recruit techs aggressively.
Pick plumbing if: You want better margins, less seasonality, and a steadier service-heavy book of business.

Both are winners. The question isn't which industry — it's which one matches your operating style and capital tolerance.

Don't pick a category. Pick an operating model.

Want help comparing specific FDDs side by side? Schedule a free franchise consultation and we'll walk through the numbers on the brands that actually fit your goals.

Related reading:

Whether you choose HVAC or plumbing, staffing your franchise operation with skilled tradespeople is critical. The Blue Collar Recruiter specializes in connecting franchise owners with qualified HVAC technicians, plumbers, and home service professionals. For homeowners comparing service providers, Discount Water Heaters offers water heater installation and service in Florida through a transparent, franchise-model approach.

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