Duct Replacement Cost in Sanford, Florida
Florida guides put duct replacement at $25–$55 per linear foot, or $2,500–$8,000 for a whole Orlando-market house — and Sanford genuinely has two different duct problems at two different ages, not one, so which range applies depends on which half of the city the house is in.
What duct work costs, Orlando market
PRICE| Job | Researched range | What drives it |
|---|---|---|
| Per linear foot, installed | $25–$55 | M&R HVAC, Tampa Bay; flex $20–$35/LF, sheet metal $20–$60/LF |
| Whole house, Orlando add-on | $2,500–$6,000 | Airborne Tech, Winter Springs |
| Whole house, Orlando add-on | $2,500–$8,000 | Smart Home Air & Heat |
| Whole house, aggregator average | $813–$2,764 | Angi Orlando, average $1,593 — likely partial jobs |
| Duct sealing (vs. full replacement) | $500–$2,500 | Smart Home Air & Heat |
Every figure below is a researched third-party range published for Florida generally, attributed to the guide it came from and linked. None of them is our quote, none is Sanford-specific, and no source publishes Sanford prices at all. Use them to sanity-check a quote, not to budget to the dollar.
Two different duct problems, two different ages
TWO PROBLEMSThe Sanford Residential Historic District holds 432 contributing buildings that predate central air entirely — every duct run in that stock is a retrofit, squeezed through joist bays or run in an unconditioned attic, feeding an air handler wedged into a closet. Two decades later, the 2002–2006 production wave — Bakers Crossing, Buckingham Estates, Celery Key — went in with builder-grade flex duct in a vented attic, and that duct is now the limiting factor on any efficiency upgrade, not the condenser. Seminole County Property Appraiser CAMA extract (Parcels.csv, files dated 2026-09-05), residential improved parcels in tax district S1 = City of Sanford.
Sealing first, replacement second
SEQUENCEA leakage test settles which range applies before any number gets quoted: sealing at $500–$2,500 if the runs are structurally sound but leaking at the boots and plenum, full replacement at $2,500 and up if they are not. Buying a high-efficiency condenser and feeding it through crushed, leaking attic flex spends the money in the wrong place. Sizing depends on the duct too.