AC replacement cost in Lake Mary, Florida
Researched market ranges, not our prices: a 3-ton AC condenser plus air handler runs about $9,000–$12,000 in Florida and a 3-ton heat pump plus air handler about $9,500–$12,500, per a Florida cost guide dated 8 April 2025. Orlando-metro guides put most 1,500–2,500 sq ft homes at $7,500–$10,500.
What a changeout costs, by the size of house Lake Mary actually has
| House or line item | Researched range | Why it lands there |
|---|---|---|
| Under about 1,500 sq ft | $7,500–$10,500 | Orlando-metro envelope. Smaller homes sit at the bottom of it, but attic access and duct condition can move a small house up a band. |
| Around the Lake Mary median, 2,176 sq ft | $9,000–$12,000 | The Florida guide’s 3-ton condenser-plus-air-handler range. The median improved residential parcel in the City of Lake Mary tax district is 2,176 sq ft, which is why this is the band most local quotes land in. |
| Heat pump instead of straight cool | $9,500–$12,500 | Roughly $500 more for the same nominal capacity, and the only configuration that reaches Duke’s $600 and $1,000 tiers. |
| Ductwork, if it is being replaced | $2,500–$6,000 | Added on top. In 1988–1996 stock with attic ducts this is a live question, not an upsell. |
| City of Lake Mary permit | $68–$90 | 0.75% of documented mechanical valuation, $35 minimum. Heathrow and other unincorporated addresses file with Seminole County instead. |
Researched market estimates gathered on 6 September 2026 from third-party cost guides (hvac.com Florida replacement guide dated 8 April 2025, Angi Orlando install guide, HomeGuide, This Old House) and one publicly advertised Lake Mary competitor price list. These are not our prices, they are not a quote, and they are not verified against any Lake Mary invoice. Ranges from commercial cost-guide sites run wide for a reason. They are not our prices, not a quote, and no figure on this page should be treated as one.
The permit, as a real line item
The line item that is genuinely local: inside the City of Lake Mary the mechanical permit for a changeout is 0.75% of the documented mechanical valuation, $35 minimum. On a $9,000 changeout that is about $68; on a $12,000 job about $90. If your address is in Heathrow, Heathrow Woods or another unincorporated pocket of ZIP 32746, the permit is a Seminole County permit on a different schedule.
What the Florida average leaves out about Lake Mary
The median living area in the City of Lake Mary tax district is 2,176 sq ft, which sits in the middle of that Orlando-metro band. But the city is not the market. Heathrow Woods homes run 4,147–7,240 sq ft and normally carry two or three air handlers, so a single-tonnage Florida average is meaningless there — and a quote for one system on a house that has three is a red flag, not a bargain.
Add the line items the averages omit: the permit (0.75% of mechanical valuation, $35 minimum, inside the city), a new disconnect and whip, a new condensate arrangement with a float switch if the air handler is in the attic, a pad and tie-downs, and haul-away. The replacement cost page breaks them out by tonnage.
What has to be on the quote before you can compare it
- Full model numbers for the outdoor unit, the indoor coil and the air handler — three numbers, not one — plus the AHRI reference for that exact matched combination.
- Nominal tonnage per system, from a Manual J load calculation on your house. Why the old data plate is not a load calculation ›
- SEER2, and HSPF2 if it is a heat pump, for the matched system rather than the outdoor unit alone. The Southeast minimums ›
- Which refrigerant the new system uses. R-410A, R-454B or R-32 ›
- The permit fee, itemised, and which authority it is pulled with.
- Parts, compressor and labour warranty stated separately, in years.
- Whether a Duke Energy Home Energy Check has already been done, because the rebate turns on it. The 24-month prerequisite ›
The question, in the wording people ask it
What Is The Average Cost To Replace An Ac Unit In Florida?
Researched market ranges, gathered 6 September 2026, not our prices: a 3-ton AC condenser plus air handler runs about $9,000–$12,000 in Florida and a 3-ton heat pump plus air handler about $9,500–$12,500, both per a Florida cost guide dated 8 April 2025. An Orlando-metro guide puts most 1,500–2,500 sq ft homes at $7,500–$10,500 within a wider $5,800–$15,500 envelope. Duct replacement adds roughly $2,500–$6,000. Get three written quotes and compare them line by line rather than by the total.
These questions are the verbatim wording used on live pages that rank for Lake Mary and Florida air-conditioning queries. They are evidence of how the question gets typed, not a capture of Google’s People Also Ask box.
Sources for this page
- hvac.com — average cost to replace an air conditioner in Florida
- Angi — new AC cost, Orlando
- City of Lake Mary — mechanical permit fees
- Seminole County Property Appraiser
Researched 6 September 2026. Fees, rebate amounts and code minimums change — check the issuing authority before you rely on a figure.