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What does a new HVAC system cost in Franklin, TN? Most homes land between $5,000 and $12,000.
Real ranges from published 2025-2026 cost data, with the sources listed, so you know the number before anybody shows up with a clipboard.
The short answer
For most single-family homes in Franklin and Williamson County, a full HVAC replacement runs about $5,000 to $12,000. Complex installs can go past $15,000 (TheLocalNova, Franklin, January 2026). Nationally, Angi puts the range at $5,000 to $22,000, with $7,500 as the average (Angi, August 2026).
The numbers
| Whole system, national (Angi, 2026) | $5,000 to $22,000, average $7,500 |
| Central AC only (Angi) | $3,900 to $7,900 |
| Heat pump (Angi) | $4,200 to $7,600 |
| Franklin, most single-family homes (TheLocalNova, 2026) | $5,000 to $12,000 |
| 2.5-ton, mid-efficiency, Franklin (TheLocalNova) | $5,000 to $7,500 |
| 3 to 4-ton, higher efficiency, Franklin (TheLocalNova) | $7,500 to $10,000 |
What makes the price go up or down
- System size (tons) and type: AC, heat pump, or full system.
- Efficiency rating. Higher efficiency costs more up front.
- Ductwork. Angi puts it at $1 to $13 per linear foot if yours needs work.
- Labor, about $1,500 on average (Angi).
- Permits, $50 to $500 (Angi). Franklin and Williamson County require them (TheLocalNova).
- Electrical upgrades and how hard the equipment is to reach.
Before you sign anything
- Get at least two written quotes that list the same items.
- Ask what's included: permits, haul-away, cleanup and warranty.
- Ask who does the work, their crew or a sub.
- Don't pay the full amount up front.
Why I'm telling you this
I learned the trades hands-on and ran my own construction company in Colorado. I've watched other contractors do to homeowners exactly what this page teaches you to stop. Not knowing is where the upsell lives. Now you know.
Quick answers
Should I repair or replace?
Angi says replacement often makes sense when the system is over ten years old and repairs have passed $5,000, especially with expired warranties.
How long does a replacement take?
One to two days for a straightforward swap (TheLocalNova).
How long does a new system last?
15 to 20 years with regular maintenance (TheLocalNova).
What does a tune-up cost?
AC tune-ups average $70 to $150, and filters run $5 to $20 each (Angi).
Sources
Educational only. Prices are published ranges as of October 2026. Your real price depends on your house, so get written quotes. Built by a Gen Xer with AI, for Gen Xers.
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