Plenty of Brentwood houses were built for ocean air and open windows, and the owners are now pricing cooling for the upstairs rooms that bake every August. Central air conditioning cost here depends less on the brand on the box and more on the house it goes into: the ducts, the attic, the lot and the panel. This page walks through the quote the way we write it, so you can see where your project sits before we come out.
The installed range, and what it buys
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. That figure is a finished, working system, not equipment on a pallet.
| Line on the quote | What it covers |
|---|---|
| Condenser | The outdoor unit, sized from the load calculation |
| Indoor coil | Matched to the condenser and set on the furnace or air handler |
| Line set and drain | Refrigerant piping and the condensate route |
| Electrical | Disconnect, breaker and wiring to the LADWP service |
| Pad or mount | Ground pad, or a bracket on a hillside lot |
| Permit and testing | LADBS paperwork and any Title 24 duct test the scope needs |
| Start-up | Charge check and a walkthrough with you |
If you want your house priced against those lines, the fastest route is the central air price form further down this page. Tell us the square footage and whether there are ducts in the attic now.
What pushes a Brentwood install up the range
Four things move the number more than anything else.
Size comes first. We size from a room-by-room load calculation, which counts glass, ceiling height, attic insulation and the shade from your trees. A canyon lot under heavy canopy can need a smaller unit than its square footage suggests. A modern house with walls of west-facing glass can need a larger one.
Efficiency tier is the second. Higher SEER2 equipment costs more at purchase and draws less from the LADWP meter each summer. We price two or three tiers side by side so the difference is a choice, not a guess.
Ducts are the third, and the one that surprises people. A house that already has a furnace usually has ducts, but many were sized for heat only and are too small to carry cooling airflow. Others were run as flex through an attic that was never planned for it, and the flex has sagged or collapsed. Our ductwork services team looks at every run before we price. Full replacement, which is what long retrofit runs and collapsed flex usually need, runs $3,200 to $7,400 and scales with the number of supplies and the distance from the air handler to the far end of the house.
Placement is the fourth. HOA screening rules, side-yard setbacks and a condenser that has to sit away from a bedroom window all add labor and material.
Central air or ductless: when the math flips
Central air is the right answer for most Brentwood homes that have a furnace and a usable attic. It is not the right answer for every house.
If the house has no ducts at all, or the cooling need is one wing, one addition or a guest house, ductless often prices out lower. Single-zone ductless installations in Brentwood typically run $3,200 to $5,300 installed, depending on indoor head style and line-set length. That is one room or one open space.
Cooling a whole house with ductless is a different job. Multi-zone systems with three to four heads range from $10,500 to $21,000, including electrical work, wall penetrations, and condenser pad or bracket mount. At that point, adding ducts for central air can be the better spend, and we write both options on the same page. Our ductless mini split service covers the single-room and multi-room layouts.
Permits, refrigerant and the efficiency label
Adding or replacing central air in California is permitted work, and in Brentwood LADBS issues the permit. We file it when the project needs it. Depending on the scope, Title 24 Part 6 can require duct sealing and a leakage test verified by a third-party HERS rater who is not the installer. When it applies, it sits on the quote as its own line.
New split systems use lower-GWP refrigerants such as R-454B or R-32. The cooling efficiency on your quote reads as SEER2, the current federal rating, so you can compare one tier to another on the same scale.
Getting the number for your own house
A range only goes so far. Your price comes from a visit: we measure the rooms, go into the attic, check the panel and walk the yard for the condenser spot. You get the quote in writing before any work starts, with each line from the table above filled in for your house. If a line does not apply, it is not on the page.
FAQ
Is central air cheaper if the house already has a furnace?
Usually. The furnace blower and the existing ducts can carry the cooling, so the job is the condenser, the coil and the connections. If the ducts are undersized, that work is priced as its own line.Why does the size of the unit change the price so much?
A larger condenser and coil cost more and can need a bigger line set and breaker. We size from the load calculation so you pay for what the house needs and no more.Can I spread the job out, ducts now and the AC later?
Yes. Some owners replace the ducts with a furnace job and add cooling later. We write the duct work so the future AC connects without redoing it.Can the condenser go on a sloped canyon lot?
Yes. A hillside lot can take a wall bracket or a built pad instead of a ground slab. The mount and the extra labor show up as a line on the quote.Call (877) 702-9609 to schedule the visit and get central air for your Brentwood house priced line by line with Brentwood Air.
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.
