The new AC system cost for a Brentwood house depends on one choice before anything else: ducted central air or ductless heads. Below are the central air range, how ductless gets priced, what moves each one, and the next step to get a number for your own house. If you already know you want pricing, ask for the written quote and we schedule the visit.
How the two are priced
Central air first. Most complete AC installations in Brentwood run between $6,200 and $11,500 depending on system size, efficiency tier, and whether ductwork modification is required.
Ductless next. There is no fixed ductless price here, because the quote follows the rooms and the wall the line has to cross. Indoor head style, line-set length, electrical work, wall penetrations, and the condenser pad or bracket mount all move it.
| System | Installed price |
|---|---|
| Central air, complete installation | $6,200 to $11,500 |
| Ductless, single zone | Written after the visit |
| Ductless, three to four heads | Written after the visit |
This is where the decision gets real. One room added to a house with no ducts points to a single zone. A whole house with working ducts points to central. A whole house with no ducts, or ducts in poor shape, is where the multi-zone number and the duct work number get compared.
What moves your number
Whichever system you choose, these set where you land:
- System size from the load calculation, which is done room by room.
- Efficiency tier, shown as SEER2.
- Duct condition: sealing, resizing or new runs on a central system.
- Electrical: a dedicated circuit or panel work for larger outdoor units.
- Install access: two-story walls, long line sets, and tight or sloped canyon lots.
- Outdoor unit spot: setbacks, HOA screening and the neighbor's windows.
None of these can be judged over the phone. That is why the quote comes after a visit.
Central air when the ducts are already there
If the house has a furnace or air handler and a duct system, a new condenser and coil can ride on the existing trunk when it is sound. We check the trunk, the returns and the supplies during the visit. Where the ducts need work, the quote shows it as its own line, and our ductwork services team prices it with the install so you have one document.
Brentwood Air lays out heat pump, furnace and ductless options side by side when the house can take more than one, so you compare real figures instead of guessing.
Ductless when the ducts are not
Ductless skips the duct trunk altogether. A condenser sits outside on a pad or bracket, and each indoor head serves one zone. It suits additions, converted garages and rooms the ducts never reached. Costs climb with long line sets, wall penetrations through two-story framing, and a dedicated 240-volt circuit. Our ductless mini split page shows the head styles.
Reading two bids side by side
When you hold more than one bid, compare the lines, not the total. Check that each one names the equipment by make, model, size and efficiency tier. Check that duct work, electrical work and the permit are listed instead of folded into one number. A low total with those lines missing is a bid that will grow later. Ours lists them up front, and you can hand our quote to anyone to compare.
Permit, refrigerant and the written quote
A new AC is permitted work in California. In Brentwood the permit comes from LADBS, the Los Angeles Department of Building and Safety. Depending on the scope, Title 24 Part 6 can require duct sealing and a duct leakage test verified by a third-party HERS rater who is not the installer. New split systems are made with lower-GWP A2L refrigerants such as R-454B or R-32.
The written estimate comes before work starts, with equipment, labor, permit and any duct or electrical work listed separately. Read it, compare it, and call us with questions. See our AC installation page for the full list of what we put in, or the Brentwood area page.
FAQ
What does a new AC system cost in Brentwood?
A complete central AC installation runs $6,200 to $11,500. A ductless system is priced from the rooms and the line run. The exact number is set at the visit.Why is ductless sometimes the cheaper choice?
It avoids duct changes. If the house has no usable ducts, ductless for a single room or a few rooms can come in under a central system with new duct work.Does the quote include the electrical work?
A multi-zone ductless quote lists electrical work, wall penetrations and the condenser pad or bracket mount. On central air, any panel or circuit work is listed as its own line.Can I get central and ductless quoted together?
Yes. Ask for both on the form and the technician writes them up side by side.How long does the visit take?
Plan on enough time for a room-by-room measurement, a look at the ducts and a check of the outdoor unit spot. The quote follows in writing.Call (877) 702-9609 to get your new AC system cost in Brentwood from Brentwood Air, written down and priced for your house.
Need Professional HVAC Service?
Our HVAC-experienced technicians are ready to help with all your AC and heating needs. Contact Brentwood Air today for expert service throughout the Brentwood and the canyons around it service area.
