AC installation and replacement cost in Southern California
Published sources do not give one price for a new AC in Southern California. A San Diego contractor, Baker Home Energy, lists central air conditioning at $4,500 to $12,000 installed. This Old House's national survey puts the average central AC replacement, with installation, at $8,460 (September 2026). Fixr puts a 3-ton AC unit nationally at $4,451 to $8,099 (January 2024). These come from different places, dates and kinds of source.
Researched October 2026. These are published estimates, not quotes. A price for your job comes from a local business.
What the published figures say
| What it covers | Published figure | Area | Source |
|---|---|---|---|
| Central air conditioning, installed (a contractor's own listed range) | $4,500 to $12,000 | San Diego | Baker Home EnergyNo date on page |
| Ductless mini-split, installed (a contractor's own listed range) | $3,000 to $8,000 | San Diego | Baker Home EnergyNo date on page |
| Heat pump, installed (a contractor's own listed range) | $5,000 to $15,000 | San Diego | Baker Home EnergyNo date on page |
| 3-ton AC unit | $4,451 to $8,099 | United States (national) | FixrJanuary 2024 |
| Central air conditioner replacement including installation, average | $8,460 | United States (national survey) | This Old HouseSeptember 2026 |
| Full HVAC system, average cost to install | $8,209 | United States (survey of 1,000 homeowners) | This Old HouseSeptember 2026 |
| Heat pump, average | $10,575 | United States (national) | This Old HouseSeptember 2026 |
What the sources say
We found one Southern California source that lists installed prices: Baker Home Energy, a San Diego heating and cooling contractor. It lists central air conditioning at $4,500 to $12,000, a ductless mini-split at $3,000 to $8,000, and a heat pump at $5,000 to $15,000. These are a seller's own figures, and the page has no date.
We did not find an Orange County or Riverside County source we could use. For those areas, the national numbers below are the best published guide we have.
National figures for comparison
This Old House, in a national survey updated September 2026, puts the average central AC replacement at $8,460 including installation. It puts a full HVAC system at $8,209 on average, and a heat pump at $10,575 on average.
Fixr gives $4,451 to $8,099 for a 3-ton AC unit (January 2024). That is a different question from the survey averages, so the numbers will not line up.
Why the published figures differ
The sources cover different places. One is a San Diego contractor. The others are national. Local labour and rules can move a price up or down.
They were written at different times, and they measure different things. A unit alone costs less than a unit with installation. A full system with ducts costs more than a single unit. A contractor's list shows what that firm may charge. A survey shows what homeowners say they paid.
Your own quote will depend on your home, your ducts and the system you pick. Ask each bidder to list what is and is not included.
Licence and who to check
In California, AC work falls under class C-20, called Warm-Air Heating, Ventilating and Air-Conditioning Contractor. The Contractors State License Board (CSLB) issues it.
To check a licence, use the CSLB online tool. You can enter the licence number to see its status. The tool also shows complaint disclosure.
Permits and testing
The City of San Diego says installing HVAC systems requires a permit. We did not check Orange County cities or Riverside County. Ask your own city whether you need a permit.
A California Energy Code sheet for one climate zone says a project triggers the Energy Code if it replaces or adds to the existing HVAC system. It also says that, with a small exception for short duct work, ducted unit replacements trigger HERS verification, which is a third-party check. In the state's acceptance test, newly installed ducts may not leak more than 6 percent, and existing ducts may not leak more than 15 percent. Climate zones differ, so ask your city or installer what applies to you.
Rebates
TECH Clean California ran a statewide heat pump HVAC incentive programme, run through SCE. Its notice said new reservations for single family heat pump HVAC incentives closed on January 17, 2025. This may be out of date. Check the pages of SCE and SDG&E and the TECH Clean California site for what is open now. We list no amounts.
Local Business America does not check licences, verify businesses or rank them. Please check the CSLB site yourself before you hire anyone.
Common questions
- How much does it cost to replace a central AC in Southern California?
- One San Diego contractor, Baker Home Energy, lists central air conditioning at $4,500 to $12,000 installed. This Old House's national survey average is $8,460 (September 2026).
- How much does a ductless mini-split cost in San Diego?
- Baker Home Energy, a San Diego contractor, lists $3,000 to $8,000 installed. That is one firm's own range.
- Does replacing an AC need a permit in San Diego?
- The City of San Diego says installing HVAC systems requires a permit. For other cities, ask the city.
- What licence should an AC installer hold in California?
- A C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor licence from the Contractors State License Board.
- How do I check an AC installer's licence?
- Use the CSLB online licence check. You can enter the licence number, and it shows the licence status and complaint disclosure.
- How much duct leakage is allowed after an install?
- In the state's acceptance test, newly installed ducts may not leak more than 6 percent. Existing ducts may not leak more than 15 percent.
- Are there heat pump rebates in California?
- TECH Clean California said single family heat pump HVAC reservations closed on January 17, 2025, so that may be out of date. Check SCE and SDG&E for programmes open now.