How much does it cost to add central air in Los Angeles?
Adding central air to a house in Los Angeles costs $7,000 to $13,000 if you already have usable ductwork, and $13,000 to $23,000 or more if the duct system has to be built from scratch — which is the common case in older San Fernando Valley homes that were heated by a wall or floor furnace and never had ducts at all. Most Los Angeles projects land between $9,000 and $20,000. The biggest cost driver is not the air conditioner itself — it is whether the house has usable ducts and whether the electrical panel can carry the new load. A new system also needs a mechanical permit from LADBS and Title 24 energy-code verification, which together add roughly $500 to $1,500.
The cost, by scenario
| Scenario | Typical all-in cost |
|---|---|
| Add/replace AC, usable existing ducts | $7,000 – $13,000 |
| Full retrofit, new duct system | $13,000 – $23,000+ |
| Ductwork alone | $5,000 – $12,000 |
| Title 24 / energy-code verification | $500 – $1,500 |
| 200-amp panel upgrade (if needed) | $2,500 – $4,000 |
These are typical 2026 Los Angeles market ranges, not a quote. Your number depends mostly on one question: does the house already have usable ducts?
Why older LA homes are the expensive case
A lot of the housing stock across Burbank, Glendale, and the San Fernando Valley went up in the 1940s–60s and was heated by a wall furnace, a floor furnace, or gravity heat — systems with no ductwork at all. Homeowners assume "adding AC" means bolting on a condenser. In these houses it means building an entire duct system into a home that was never designed for one: finding a spot for the air handler (attic, a furred-down closet, or the garage), running insulated supply and return ducts, cutting in registers, and frequently opening plaster ceilings to do it.
That labor — not the condenser sitting outside — is where the budget goes. It is the same lesson as any older-home project: the equipment is the cheap part.
What you are actually paying for
On a ducted retrofit, roughly: equipment (condenser plus air handler and coil) 30–40%, ductwork 25–40%, electrical 10–15%, permit and Title 24 compliance about 10%, with labor threaded through all of it. Notice the split — on a house that already has good ducts, the ductwork line nearly disappears and the job lands at the bottom of the range. On a house with none, it is the largest single line.
The two hidden costs people miss
The electrical panel. A new AC compressor is a real load, and a 100-amp panel that already runs the house often cannot take it. This is the most common surprise in a postwar remodel: the AC quote is fine, but the panel has to be upgraded first. Budget $2,500–$4,000 for a 200-amp service, and read our breakdown of electrical panel upgrades in LA, Burbank, and Glendale — the process differs by which utility serves your street.
Title 24 energy-code verification. California's energy code requires new HVAC to be independently verified in the field — duct leakage, refrigerant charge, and airflow — and the 2026 code requires ducts insulated to at least R-6. The rater, the testing, and any duct corrections add about $500–$1,500. Our guide to what Title 24 adds to a remodel covers where those numbers come from.
Do you need a permit?
Yes — a mechanical permit from LADBS, or your city's building department, for a new central AC where none existed. The permit is also what triggers the energy-code verification above. It is tempting to skip on a "quick" install, but unpermitted HVAC is a classic escrow problem, and an unverified system that fails a duct-leakage test later is a bill you pay twice.
The ductless alternative
If your house has no ducts and the attic won't easily take them, don't assume central air is your only option. A ductless mini-split puts an air handler on the wall of each zone and runs only a small refrigerant line back to the outdoor unit — no duct construction, no opened ceilings. For a smaller home, a converted garage, or a room addition, it is frequently the cheaper and faster path, and it lets you cool the rooms you use instead of the whole house.
How to not get surprised
Before you commit, have a licensed contractor do three things: run a load calculation (Manual J) so the system is sized right, open the electrical panel to see if it can carry the AC, and check attic clearance to see whether ducts even fit. Those three checks predict most of the cost surprises. Getting AC is often part of a larger project — if you are already planning a whole-home renovation, the smart move is to design the HVAC in from the start rather than bolt it on at the end.
DN Builders Group Inc is a licensed, bonded general contractor based in Burbank (CA Lic. #1139710). Figures are typical 2026 Los Angeles market ranges, not a quote — equipment prices, utility fees, and energy-code costs change; confirm current numbers with your contractor and LADBS. This is general information, not engineering or financial advice.
Questions
Can you add central air to a house with no ductwork?
Yes, but that is the expensive version. Building a full duct system into a house that never had one — attic air handler, supply and return runs, cut-in registers, and often opened ceilings — is where the money goes, pushing a job to $13,000–$23,000+. If ducts are impractical (low attic clearance, plaster ceilings, a slab house), a ductless mini-split system skips duct construction entirely and is often competitive for smaller homes, additions, or a single zone.
Do you need a permit to install central air in Los Angeles?
Yes. A new central AC where none existed needs a mechanical permit from LADBS (or your city's building department), plus Title 24 energy-code verification — independent field testing of duct leakage, refrigerant charge, and airflow. As of January 1, 2026 that program is called ECC (Energy Code Compliance); it is the same check formerly known as HERS testing. Unpermitted HVAC is a routine problem that surfaces in escrow when the house sells.
Will my 100-amp electrical panel handle central air?
Often not. Much of the postwar Valley housing stock runs on a 100-amp — sometimes 60-amp — service that has no room for an AC compressor's load, especially alongside a modern kitchen or an EV charger. Your contractor runs a load calculation early; if the panel is maxed, budget a 200-amp upgrade at roughly $2,500–$4,000 on top of the AC.
How long does it take to add central air?
A straight AC install on existing ducts is often one to two days. A full retrofit with a new duct system runs several days to a couple of weeks, plus calendar time for the permit, the energy-code verification appointment, and inspection. Plan on 1 to 4 weeks end to end depending on scope.