Apex HVAC Replacement Cost
Replacing a heating and cooling system is one of the largest home maintenance costs. Prices vary with system type, capacity, efficiency, ductwork condition and installation complexity, so two quotes for the same house can differ by thousands of dollars.
This guide sets out published ranges and the factors that explain the differences.
Published ranges
Published 2026 national estimates put full HVAC replacement at about $5,000–$12,500, averaging around $7,500, and up to about $22,000 when ductwork and upgrades are included. Heat pump replacement averages about $6,087, with most projects at $4,236–$7,942.
What drives price
System type (heat pump, AC and furnace, or dual-fuel), capacity, efficiency rating, variable-speed or two-stage equipment, attic or crawl space installation, duct repair or replacement, electrical upgrades, line set replacement, and thermostat and air quality add-ons. Access in tight attics and crawl spaces adds labor.
Sizing matters
Ask for a load calculation instead of replacing the old unit size-for-size. Oversized systems short-cycle and dehumidify poorly in Triangle summers; undersized systems run constantly. Good duct sealing improves comfort and efficiency.
Permits and inspections
System replacement in Apex requires a mechanical permit. The Town's permit guidance lists replacing furnaces and modifying HVAC systems as permit work, and residential mechanical permits are submitted through ePermits by a licensed contractor. State law excludes HVAC replacement from the $40,000 permit exemption.
Rebates and credits
Duke Energy's Smart $aver program offers rebates on qualifying equipment installed by participating contractors. The federal Section 25C tax credit ended for property placed in service after December 31, 2025.
Comparing quotes
Ask each bidder for the equipment model numbers and efficiency ratings, the load calculation, duct work included, permit and inspection handling, startup and commissioning, and warranty terms for parts and labor. Confirm North Carolina licensing and insurance.
Published HVAC cost estimates
| Item | Published range | Source |
|---|---|---|
| HVAC system replacement | $5,000–$12,500 (avg. about $7,500); up to about $22,000 with ductwork and upgrades | Angi 2026 |
| Heat pump replacement | $4,236–$7,942 (avg. about $6,087) | Angi 2026 |
| Air-source heat pump, installed | $4,500–$8,000 | Angi 2026 |
| General HVAC repair | $130–$2,000 (avg. about $350) | Angi 2026 |
| Heat pump repair | $161–$661 (avg. about $410) | Angi 2026 |
| Compressor repair | $650–$2,400 | Angi 2026 |
Sources: Angi: HVAC replacement cost (2026); Angi: Heat pump cost (2026); Angi: HVAC repair cost (2026); Angi: Heat pump repair cost (2026). Figures are published national or regional estimates compiled by those sites, labeled as estimates; they are not quotes and not prices from any provider on this site. Town of Apex permit fees are separate and set by the Town.
Local rules and code references
- Town of Apex, When do you need a permit?: lists replacing and reconnecting furnaces and adding to or modifying the heating and air conditioning system as work that requires a permit regardless of cost.
- Town of Apex, Obtaining a Building Permit: residential single-trade mechanical permits must be submitted through ePermits by a licensed contractor.
- N.C. Gen. Stat. §160D-1110: subsection (a)(3) requires permits for the installation, extension, alteration or general repair of any heating or cooling equipment system; the $40,000 exemption in subsection (c) does not apply to the addition, replacement or design change of heating or air-conditioning equipment (c)(3).
- Wake County Permits and Inspections FAQ: a mechanical/HVAC permit is required for installation, extension, relocation, replacement and general repair of any heating, air-conditioning or venting system (applies in Wake County's own jurisdiction; Apex issues its own permits).
- Town of Apex Building Inspections & Permitting: the Town enforces the NC State Building Codes and performs field inspections; conditional mechanical inspections are performed only on contractor request.
Code text and department procedures change; confirm current requirements with the jurisdiction before work starts.
Frequently asked questions
- How much does HVAC replacement cost in Apex?
- Published 2026 estimates put full HVAC replacement at about $5,000–$12,500, averaging around $7,500, and higher with ductwork.
- How long does an HVAC replacement take?
- A straightforward swap is often done in a day or two; duct work or system changes take longer.
- Do I need a permit to replace an HVAC system in Apex?
- Yes. The Town of Apex lists replacing and reconnecting furnaces and modifying the heating and air-conditioning system as permit work, and N.C. Gen. Stat. §160D-1110 excludes HVAC replacement from the $40,000 permit exemption.
- Who pulls the mechanical permit in Apex?
- The Town says residential single-trade mechanical permits must be submitted through ePermits by a licensed contractor.
- Is there still a federal tax credit for heat pumps?
- Not for new installs. The IRS says the Section 25C energy efficient home improvement credit is not allowed for property placed in service after December 31, 2025.
- Should a new system be the same size as the old one?
- Not necessarily; a load calculation should determine capacity, since oversizing is common and hurts humidity control.
Related local guides
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