A new AC installation can cost very differently from one home to another. The biggest price drivers are unit size (tonnage), efficiency rating, ductwork condition, and whether the job is a simple replacement or a full system upgrade.

Quick answer

New AC installation cost depends on unit size, efficiency, installation complexity, ductwork needs, and local labor rates. A basic replacement is usually cheaper than a first-time install or a ductwork-heavy job.

What’s typically included in an AC install quote

• AC condenser + indoor coil
  
  
• Refrigerant line set (sometimes)
  
  
• Labor and startup testing
  
  
• Electrical disconnect and safety items
  
  
• Haul-away of old unit (if replacement)
  
  
• Permit/inspection (sometimes)
  
  

Biggest factors that change AC installation cost

1) AC size (tonnage)

Bigger homes usually need larger systems, which increases equipment cost.

2) Efficiency rating

Higher efficiency units usually cost more upfront.

3) Ductwork condition

If ductwork is leaking, undersized, or damaged, costs rise because performance depends on ducts.

4) Replacement vs first-time install

A straightforward replacement (same size, similar setup) is often less expensive than a new installation.

5) Electrical upgrades

Some installs require electrical updates or panel work.

6) Access and complexity

Attic installs, tight spaces, long line sets, and multi-zone setups increase labor time.

Simple budgeting breakdown (how to think about it)

• Equipment (unit + coil)
  
  
• Labor + installation materials
  
  
• Ductwork adjustments (if needed)
  
  
• Permit/inspection (if needed)
  
  
• Optional add-ons (thermostat, air quality)
  
  

How to lower AC install costs safely

• Get 2–3 quotes for the same tonnage and efficiency target
  
  
• Ask what’s included (permit, line set, haul-away)
  
  
• Don’t oversize the unit—proper sizing improves comfort and cost
  
  
• Consider off-season scheduling if possible
  
  

Checklist before hiring an HVAC contractor

• Confirm unit size recommendation and why
  
  
• Ask about duct inspection findings
  
  
• Ask what’s included in warranty
  
  
• Confirm permit handling
  
  
• Get itemized pricing in writing
  
  

FAQs

Do I need to replace ductwork with a new AC?
Not always, but damaged/leaky ducts can reduce efficiency and comfort.

How long does an AC install take?
Many replacements are completed in a day; more complex installs can take longer.

Should I replace the furnace at the same time?
Sometimes it’s cost-effective if the system is older, but it depends on condition and budget.

Related guides

• HVAC Replacement Cost (Full System)
  
  
• Heat Pump Installation Cost
  
  
• Mini Split AC Cost
  
  
• Ductwork Replacement Cost