Rehab cost guide
How Much Does HVAC Replacement Cost on a Flip? (2026)
Heating and cooling is a major mechanical line item — here's how to budget it.
Replacing an HVAC system on a flip typically costs $5,000–$12,000 for a full furnace-and-AC system, with most jobs around $7,000–$10,000. A furnace alone runs $2,500–$6,000 and central AC $3,000–$7,000. Adding or replacing ductwork pushes costs higher; a service or repair may be enough on a newer system.
HVAC is a major mechanical system buyers and inspectors check closely. An old or non-working system is both a safety concern and a negotiating point, so it often needs attention on a flip.
These are general 2026 estimates; system size (tonnage), efficiency rating, and ductwork condition drive the price. Get an HVAC contractor's bid before budgeting.
Cost breakdown
| Item | Typical range | Notes |
|---|---|---|
| Furnace | $2,500–$6,000 | Gas furnace, installed |
| Central AC / condenser | $3,000–$7,000 | Scales with tonnage and SEER |
| Ductwork (if needed) | $1,500–$6,000 | New or major repair |
| Thermostat & misc. | $150–$600 | Programmable thermostat, fittings |
What affects the cost
- Whether you need a furnace, AC, or both.
- System size (tonnage) for the home's square footage.
- Condition of existing ductwork.
- Efficiency rating (SEER) and local climate requirements.
Figures are general 2026 estimates and vary widely by market, scope, and materials. Always confirm with local contractor bids before budgeting a deal.
Build a real rehab budget in FlipOS
Turn these ballparks into a line-item estimate tied to your deal analysis and live project budget. 14-day free trial, no credit card.
Get started freeFrequently asked questions
- How much does it cost to replace HVAC on a flip?
- A full furnace-and-AC replacement typically costs $5,000–$12,000, with $7,000–$10,000 common. A furnace alone is $2,500–$6,000 and central AC $3,000–$7,000. New ductwork can add several thousand more.
- Do I need to replace HVAC when flipping?
- Not always. If the system is newer and works, a tune-up and cleaning may suffice. Replace it if it's at end-of-life, unsafe, or non-functional — a working, serviced system reassures buyers and inspectors.
- Is a heat pump cheaper than a furnace and AC?
- A heat pump replaces both heating and cooling in one system and can be cost-competitive, especially in milder climates. Installed costs vary widely; get a local bid comparing a heat pump to a separate furnace and AC.