Oviedo, Chuluota & Black Hammock · ZIP 32765 / 32766 / 32762(321) 415-3018
Seminole County, FL
What it costs

Duct replacement cost in Oviedo, FL

Researched Florida figures put ductwork modification on a system replacement at $500 to $1,500. In Oviedo it comes up often because of when the city was built: 25.0% of its 12,263 residential parcels date from 1970 to 1989, and those duct systems were sized for the equipment of their day, not for a modern variable-speed air handler.

Read this before you use any number on this page. Every figure here is a researched third-party market range with its source and capture date named beside it. None of them are a contractor’s price and none of them are a quote. They are here so you can sanity-check a quote you have already been given.

What is actually sourced, and what is not

$500–$1,500 for duct modification as part of a replacement — resizing returns, replacing runs, sealing. Source: AC replacement cost guide for Florida, published by an Oviedo contractor, a Florida cost guide published by an Oviedo contractor, captured September 2026.

For a full whole-house duct replacement, we found no dated Central Florida figure and will not estimate one.

1.7%Pre-197025.0%1970-8938.1%1990-9935.2%2000+

Why this is an Oviedo question and not a generic one

Look at where the housing stock actually sits. Alafaya Woods — the HOA’s own figure is 2,230 homes, developed from 1985 to the last homes in 1996 — is the largest single block of thirty-to-forty-year-old housing in the city. The county appraiser records Alafaya Woods Phase 2 at a 1986 median with 100% of its parcels in the 1970–89 band, and Alafaya Woods Ph 01 Unit B at a 1985 median, also 100%. Twin Rivers Sec 3A carries a 1990 median with 32.2% still in that band.

Those houses are not on original equipment. They are on a second or third changeout — against duct runs and return sizing that have never been touched. That is the case where the duct allowance on a quote is a genuine cost rather than an upsell.

Contrast the newer end of the same table: the Hamptons Second Replat and Oviedo Gardens both carry 2016 medians, and Isles of Oviedo 2011. On those, a duct line item deserves a harder question.

Sources: Alafaya Woods Homeowners Association for the Alafaya Woods build window and home count; Seminole County Property Appraiser CAMA extract, Parcels.csv dated 5 September 2026 for every parcel figure. The full subdivision table is here.

Replacing ducts changes what the City wants on the application

Oviedo publishes a dedicated HVAC Change Out Permit Application Guidelines page. Every changeout needs the ACCA Manual J-2016 sizing calculation and proof of the manufacturer and model numbers. If the ductwork is being replaced, two more deliverables appear:

  • A duct layout including all supply and return ducts.
  • Energy calculations on form R402-2023 for residential work.

Both take real time to produce. A quote that includes duct replacement but no line for the layout and the energy calculations is a quote that has not thought about the application yet.

Source: City of Oviedo Permit Guidelines (PDF) — p.36, HVAC Change Out Permit Application Guidelines. Unincorporated Chuluota and Black Hammock addresses file with Seminole County instead. Which desk is yours.

Five business days — when it applies

Since 1 July 2026 a local government must approve, approve with conditions, or deny a mechanical permit application within 5 business days — but only where the work is on an existing single-family dwelling, the value of the work is under $15,000, and the applicant is using the local government plans reviewer. Plenty of full changeouts now clear $15,000, and those fall into a longer tier of the same statute. Nobody should promise you five days without checking all three.

s. 553.792(1)(a)1., Fla. Stat., added by s. 10, ch. 2026-63.

Ductwork questions

How much does duct replacement cost in Oviedo?

The one Florida-specific figure our research found is $500 to $1,500 for ductwork modifications carried out as part of a system replacement, from a cost guide published by an Oviedo contractor. That is modification — resizing returns, replacing runs, sealing — not a whole-house tear-out.

We do not have a sourced range for a full duct replacement in this market and we are not going to invent one. Source for the modification range: AC replacement cost guide for Florida, published by an Oviedo contractor.

Does replacing ductwork change the permit?

Yes, and this is specific to Oviedo’s published guidelines rather than a general statement. If the existing ductwork is being replaced, the City requires a duct layout showing all supply and return ducts plus energy calculations on form R402-2023 for residential work, on top of the Manual J-2016 sizing calculation and the equipment model numbers that every changeout needs.

That is real drafting and calculation work. It belongs in the quote as a line item rather than appearing as a surprise after the job starts. Source: City of Oviedo Permit Guidelines (PDF) — p.36, HVAC Change Out Permit Application Guidelines.

How do I know my ducts are the problem?

The honest answer is a static pressure reading, not a guess. But the pattern to look for is rooms that never match the thermostat, a system that runs constantly without satisfying, whistling at the registers, or a brand-new high-efficiency system that does not feel better than the one it replaced.

The last of those is the giveaway. A modern variable-speed air handler moves air differently from a 1986 single-speed unit, and on the return sizing of that era it is throttled. You paid for efficiency the duct system will not let you have. Uneven cooling between rooms.

Where to go next

Sources for this page