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AC installation for multifamily buildings
For a Los Angeles apartment building, the building's electrical service and where outdoor units can go decide the system before price does. Per-unit mini-splits are the common retrofit. This site's form is residential-first and multi-unit partners are not yet confirmed.
Reviewed · 6 named sources · No named reviewer yet; see our editorial policy.
What this site can and cannot route
The form is residential-first, and no partner contractor for multi-unit buildings has been confirmed. A building-wide request that nobody covers gets an email saying so, not a hand-off.
At a glance
The options for a multifamily building
- Per-unit ductless mini-splits: one outdoor unit per apartment, on the roof, wall brackets or the ground. No shared ducts, and each tenant controls their own unit.
- Per-unit split or packaged systems where units have closets for air handlers or through-wall sleeves.
- Central plant systems: larger buildings only, and engineered rather than quoted off a price list.
| Option | Best where | Main constraint |
|---|---|---|
| Per-unit mini-splits | Garden and low-rise buildings with roof or wall space | Outdoor unit locations, line-set routes, each unit's panel |
| Per-unit split or packaged | Units with closets or existing through-wall sleeves | Sleeve sizes and equipment that fits them |
| Central plant | Larger buildings | Engineering, metering and cost allocation |
How a building retrofit is phased
- Electrical assessment of the service and each unit's panel.
- Pilot unit to confirm routes, noise and tenant disruption.
- Building proposal priced per unit, with exclusions and the schedule.
- Permits for mechanical and electrical work; utility coordination if service changes.
- Phased install with tenant notices and access windows.
- Inspections and rebate paperwork filed together where the program asks for it.
Electrical service is usually the constraint
Older LA apartment buildings were often wired for light, small appliances and gas heat. Adding a cooling circuit to every unit can exceed the building's service. A single-house panel upgrade is published at $2,000–$7,500; a building service upgrade is engineered and coordinated with the utility, and no source here prices it.
Permits and roof work
Each unit's installation needs mechanical and electrical permits from the building's city or county office; see the permit guide. Rooftop condensers can need a crane, published at $800–$2,000 for houses, plus roof penetrations that must be flashed.
What to ask
- Has the building's electrical service been assessed for the added load?
- Where will each outdoor unit go, and how are line sets routed?
- Is the price per unit or for the building, and what is excluded?
- Who coordinates with tenants for access, and over what schedule?
- Will the systems be heat pumps, and will the rebate application cover all units at once?
- Is a pilot unit priced before the building-wide contract?
Compare bids with the quote tool and check prices against the published LA ranges.
Sources
- E & A Mechanical (Tujunga), heat pump installation cost in Los Angeles (retrieved 2026-09-29)
- HVACProjectCost.com, Los Angeles HVAC replacement cost (retrieved 2026-09-29)
- Reliable Heating and Air (Woodland Hills), AC installation cost in LA and Ventura County (retrieved 2026-09-29)
- California Code of Regulations, Title 16, § 832.20, via Cornell LII (retrieved 2026-09-29)
- LADWP, "Consumer Rebate Program" (Heat Pump HVAC) (retrieved 2026-10-20)
- South Coast AQMD, "GO ZERO Incentive Program" (retrieved 2026-10-20)
Questions
Can this site get quotes for a whole apartment building?
Not reliably yet. The form is built for single homes and units, and no partner contractor for multi-unit projects has been confirmed. If nobody covers your request, we email you and say so.
What is the cheapest way to add AC to apartment units?
It depends on the building. Per-unit mini-splits avoid shared ducts and are published at $4,000–$7,500 for one zone in a house; building-wide work is usually priced lower per unit but needs a site survey. Electrical service capacity often decides it.
Can an apartment building get the LADWP heat pump rebate?
LADWP's page says multi-residential dwellings may qualify for more than one unit if applied for at one time. New construction and ADUs are excluded. Ductless tiers ran $1,500–$2,500 per ton on 2026-10-18; confirm building eligibility with LADWP.
Should the AC be on the tenant's meter or the house meter?
Per-unit systems are usually wired to each unit's own panel and meter, so tenants pay for their own cooling. Wiring to a house meter is possible but shifts the cost to the owner. Decide before the electrical design.
How do you install AC in occupied units?
In phases, unit by unit or floor by floor, with notice and access windows for each tenant. Ask the contractor for a schedule per unit and who handles tenant notices and access.
Does adding AC to rental units need permits?
Yes. Each installation is mechanical and electrical work that needs permits from the city or county building department. A building-wide change to electrical service can also involve the utility.
Next step
Free quote request
Get a quote to check against these numbers
- Tell us about the job. Service, ZIP, property and timing. The form says right away if your ZIP is outside the area.
- We check the license first. Requests go only to contractors whose CSLB C-20 license we have matched on the state register. If none covers your ZIP yet, we email you and say so.
- Compare what comes back. Line the written quote up against the published ranges and the quote checklist.
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Send a request (homes first)
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