What an AC replacement costs, and what moves the number
Two houses on the same street can get very different quotes for a new air conditioner. Here is what decides the number, and how to read a quote line by line.
Updated September 2026 by the Air Cove HVAC team
Replacing a central air conditioner in Los Angeles is priced from the house, not from the old unit label.
The old unit tells us what was installed years ago. It does not tell us what the house needs today. Insulation, new windows, an added room, the ducts and the afternoon sun all change the answer.
So the answer is a short list of things we measure and check. We price every AC installation and replacement after we have seen the house.
The things that move the price
These are the factors that make one replacement cost more than another. Each one is something we look at on the visit.
| Factor | Why it changes the price |
|---|---|
| The size the house needs | More cooling capacity means bigger equipment. We size it from a load calculation, not from square feet alone. |
| The type of system | An AC with a gas furnace, a heat pump that heats and cools, or ductless heads in each room are three different jobs. |
| Replacing one half or both | A new outdoor unit usually needs a matching indoor coil, and an old furnace or air handler may be due as well. |
| The ducts | Ducts that leak or are too small can add sealing or replacement to the job. |
| Where the indoor unit sits | An attic, a closet, a garage or a crawl space each take different time and parts. |
| The electrical side | A bigger system may need a new circuit, a new disconnect or room in the panel. |
| Efficiency | Higher efficiency equipment costs more to buy and less to run. |
| The permit and the Title 24 test | Both are part of a proper changeout in California, and both belong in the quote. |
Why the answer is different in Los Angeles
A replacement here is more than a swap of boxes. Three rules shape every quote.
The permit. Replacing an air conditioner needs a mechanical permit from your city's building department. In the City of Los Angeles most changeouts go through an express permit. Santa Monica, Glendale, Pasadena, Long Beach and the other cities run their own departments. We pull the permit as part of the job.
The Title 24 test. California's energy code treats a new outdoor unit, coil, air handler or furnace as an altered system. That usually means an independent HERS rater comes out after the install. The rater tests the ducts for leaks, and existing ducts usually need to test at 15 percent leakage or better. Depending on your climate zone, the rater also checks the refrigerant charge. The result goes on the permit record. If the ducts fail, sealing them becomes part of the job, which is why we look at them before we quote.
The new refrigerants. New air conditioners and heat pumps made since 2025 mainly run on R-454B or R-32 instead of R-410A. A new outdoor unit on the new refrigerant is paired with a matching indoor coil. That is one reason a replacement that looks like "just the outside unit" often is not.
The inland valleys add one more thing. In Woodland Hills, Sylmar or Santa Clarita, the system works long, hot afternoons, and sizing and duct condition matter even more there than near the coast.
What a Los Angeles quote should include
When you compare quotes, check that each one covers the same work. A lower number that leaves out the permit or the test is not a lower price.
The equipment
The outdoor unit, the matching indoor coil, and the furnace or air handler if it is being replaced too.
The permit
The mechanical permit from your city's building department, pulled by the contractor.
The HERS test
The Title 24 duct leakage test and, depending on your climate zone, the refrigerant charge check.
Duct work
Any sealing or repair the ducts need to pass the test and to deliver the air.
Electrical
A new disconnect, a new circuit or panel work if the new system needs it.
Start-up and testing
Charging, checking airflow and running the system before anyone leaves.
The decision you are really making
Behind the price sits a decision, usually one of these.
- Repair or replace? A common rule of thumb multiplies the age of the system by the repair price. If the answer is above 5,000, replacement is worth pricing. Our guide to how long an AC unit lasts covers the signs that a system is near the end.
- Air conditioner or heat pump? If the furnace is old too, one heat pump can replace both. Our guide to heat pump or AC walks through that choice.
- Ducted or ductless? A house with no ducts, or ducts in poor shape, may be better served by mini splits.
To answer these, we look at the age and condition of the current system, the refrigerant it uses, the ducts, the electrical panel and how you use the house. Then we give you the price for the option that fits, and the others if you want to compare. Before you buy, check the current rebates at LADWP, SCE or SoCalGas, depending on your utility, because programs change.
Pricing your house
We visit, measure and check the ducts before we give a number. Your quote lists the equipment, the permit, the Title 24 test and the work the house actually needs. We are licensed and insured.
Our page on AC installation and replacement explains how we size, install and test a new system, from the permit to the final check. When you are ready for a number, that is the place to start.
AC replacement cost questions
How much is a new AC unit for a 2000 sq ft?
Square feet alone cannot answer it. Two 2,000 square foot houses can need different sizes because of insulation, windows, sun, ceiling height and the ducts. A house in the inland valleys usually needs more cooling than the same house near the beach. We size the system from a load calculation, and then we can give you a real price for your house.
What is the average cost to install an AC unit?
An average mixes small condos with large valley homes, new ducts with old ones, and jobs with and without permits. It will not tell you what your house costs. What moves the price is the size, the system type, the ducts, the electrical work, and the permit and Title 24 test. We price your house after we have seen it.
Can I just replace the outdoor unit?
Sometimes. A new outdoor unit on R-454B or R-32 needs a matching indoor coil, and the change still needs a permit. We check what you have and tell you whether a partial replacement makes sense.
Thinking about a new air conditioner? Tell us about the house and the system you have now.
Get a price for your house
Call us, or send the form and we will call you back to set up a visit anywhere across Los Angeles.