Its own utility and rebate
Pasadena Water and Power, not LADWP or SCE, supplies electricity. PWP rebates heat pumps and mini-splits rated at least 15.3 SEER2 and 7.8 HSPF2.
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AC installation in Pasadena
Pasadena has its own electric utility and its own Permit Center, so the rebate and the permit both differ from the City of Los Angeles. Pasadena Water and Power pays $170 per ton on qualifying heat pumps, and Pasadena sees 74.1 days a year at 90 °F or above, against 4.8 at LAX.
Reviewed · 6 named sources · No named reviewer yet; see our editorial policy.
Pasadena at a glance
$170/tonPWP heat pump rebate, plus $20/ton bought in Pasadena
74.1 daysa year at 90 °F or above (NOAA Pasadena station)
27%of homes built before 1940 (ACS 2024)
What differs in Pasadena
City Permit Center, not LADBS
Pasadena issues its own mechanical permits. It says standard residential HVAC permits are available online through its Express Permit Portal, under the 2025 California codes in force since 1 January 2026.
Equipment out of street view
A city document quotes Pasadena's rule that new exterior mechanical equipment, including air conditioning, be screened or kept out of view of public streets. That shapes where a condenser or mini-split unit can go.
How hot Pasadena gets
Pasadena sits at the foot of the San Gabriel Mountains, and it runs much hotter than the coast. On NOAA's 1991–2020 normals the Pasadena station averages 74.1 days a year at 90 °F or above and 9.5 at 100 °F. That is three times downtown LA and fifteen times LAX.
Days a year at 90 °F or above
| Station | Days ≥90 °F | Days ≥100 °F | Avg summer high | Cooling degree days |
|---|---|---|---|---|
| LAX airport USW00023174 | 4.8 | 0.2 | 74.6 °F | 720 |
| Downtown LA (USC) USW00093134 | 25.6 | 1.8 | 81 °F | 1,296 |
| Burbank–Glendale–Pasadena airport USW00023152 | 53.9 | 7.2 | 85.3 °F | 1,481 |
| Pasadena USC00046719 | 74.1 | 9.5 | 88 °F | 1,604 |
| Woodland Hills (Pierce College) USC00049785 | 115.3 | 35.6 | 93.7 °F | 1,819 |
What it means for sizing
A house in Pasadena usually needs more cooling capacity than the same house near the coast. The contractor should still size it with a Manual J load calculation, not by floor area. Pasadena is in CEC building climate zone 9 (verify the address with the CEC tool), which sets the Title 24 tests.
What Pasadena houses are like
Pasadena's housing is old. The Census Bureau's 2024 survey puts 27% of homes before 1940 and the median year built at 1965. Many Craftsman and period revival houses from that era were built without central ducts, which is why ductless systems come up so often here.
1965median year housing in Pasadena was built
34%of homes built before 1950
46%of homes in buildings of five or more units
Pasadena homes by decade built
Nearly half (46%) of homes are in buildings of five or more units. For a condo or apartment, the HOA or landlord controls where an outdoor unit may go, so ask first. See AC installation in condos.
Which system fits which Pasadena house
| House | Usual fit | Why | PWP rebate? |
|---|---|---|---|
| Pre-1940 house, no ducts | Multi-zone mini-split heat pump | No attic duct run; one head per main room | Yes, per ton |
| House with a gas furnace and ducts | Ducted heat pump | Reuses the ducts and retires the furnace | Yes, if 15.3 SEER2 / 7.8 HSPF2 |
| Furnace with years left, good ducts | Central AC | Lowest change; keeps the furnace | No |
| Condo or apartment | Mini-split, if the HOA allows | Small outdoor unit; placement needs approval | Yes, per ton |
What installation costs
No source we trust publishes Pasadena-only prices, so these are the Los Angeles published ranges from 6 named LA sources. They are not quotes.
| Job | Published LA range, 2026 |
|---|---|
| Central AC, 3 tons, existing ducts | $8,000–$16,000 |
| Ducted heat pump, 3 tons | $12,000–$15,000 |
| Mini-split, 1 / 2 / 3 zones | $4,000–$7,500 / $9,000–$12,500 / $12,000–$16,500 |
| New or replaced ductwork (adder) | +$3,500–$8,000 |
| Panel upgrade, 100 A to 200 A (adder) | +$2,000–$7,500 |
Every source and date: AC installation cost in Los Angeles.
The PWP heat pump rebate, worked through
- Check eligibility. Residential PWP electric customer; heat pump or mini-split heat pump at 15.3 SEER2 and 7.8 HSPF2 or better; one ducted unit per 10 years.
- Work out the amount. $170 × tons. A 3-ton system is $510. Add $20 per ton ($60) if you bought the equipment in Pasadena, and $170 per ton more if you are on PWP's Bill Payment Assistance program.
- Install with a permit. Keep the invoice with model numbers and the permit.
- Apply within 180 days of purchase, after the installation is done.
Before you subtract it from a quote
Rebate terms and funds change. Confirm on the PWP rebate page that the program is open. The federal 25C credit applied to qualifying equipment placed in service before 31 December 2025. A system installed in 2026 does not qualify.
Getting the permit in Pasadena
- Confirm the property is in the City of Pasadena. Altadena, next door, is unincorporated county land: its permit comes from LA County Public Works.
- The contractor applies through the Pasadena Permit Center, in their name, under their CSLB C-20 license.
- Agree the equipment location with the screening rule in mind, and get HOA approval for a condo.
- Install, then test. The ducts are sealed and tested and a third-party rater verifies the work (Title 24).
- Final inspection. Keep the finalled permit for the rebate and for any future sale.
Pasadena installation checklist
- PWP electric account confirmed (check the bill).
- Address is in the City of Pasadena, not Altadena or San Marino.
- Ducts? If none, price a multi-zone mini-split against new ducts.
- Equipment rated 15.3 SEER2 / 7.8 HSPF2 or better, if you want the rebate.
- Outdoor unit location agreed, out of street view where possible.
- Permit pulled by the contractor; Title 24 rater booked.
- Panel capacity checked (older houses often have 100 A).
- Rebate applied for within 180 days.
Then line your quotes up in the quote comparison tool.
Sources
- Pasadena Water and Power, Heat Pump Rebate (retrieved 2026-10-18)
- City of Pasadena Permit Center Online (retrieved 2026-10-18) — verify before relying on it
- City of Pasadena, environmental documentation (May 2026 agenda) quoting the city rule on screening exterior mechanical equipment (retrieved 2026-10-18) — verify before relying on it
- LA County Public Works, "Express Permits" (retrieved 2026-09-29)
- NOAA NCEI, U.S. Climate Normals 1991–2020, annual/seasonal station files (retrieved 2026-10-18)
- U.S. Census Bureau, American Community Survey 2024 1-year, tables B25034, B25024, B25035, B25003 (via Census Reporter) (retrieved 2026-10-18)
Questions
How much does AC installation cost in Pasadena?
No reliable Pasadena-only figure exists, so use the Los Angeles published ranges: a 3-ton central AC at $8,000–$16,000, a 3-ton ducted heat pump at $12,000–$15,000 and a one-zone mini-split at $4,000–$7,500. Older Pasadena houses often add ducts or a panel upgrade.
How much is the Pasadena Water and Power heat pump rebate?
PWP pays $170 per ton on a qualifying heat pump or mini-split heat pump, plus $20 per ton if the equipment is bought in Pasadena. Customers in its Bill Payment Assistance program get an extra $170 per ton. A 3-ton system earns $510 before bonuses.
What efficiency does the PWP rebate require?
At least 15.3 SEER2 and 7.8 HSPF2. That is above the federal minimum, so check the exact model before you sign.
Can I get the PWP rebate on a regular central AC?
No. The rebate covers heat pumps and mini-split heat pumps. A cooling-only AC does not qualify.
When do I apply for the PWP rebate?
After installation, within 180 days of purchase. You need to be a residential PWP electric customer, and PWP limits it to one ducted unit per 10 years.
Who issues the AC permit in Pasadena?
The City of Pasadena Permit Center, not LADBS. The city says standard residential HVAC permits can be issued online through its Express Permit Portal.
Is Altadena part of Pasadena for permits?
No. Altadena is unincorporated Los Angeles County, so its permits come from LA County Public Works, whose express permits list AC and heating unit replacement.
Do Pasadena rules limit where the outdoor unit can go?
A city document quotes a Pasadena rule that new exterior mechanical equipment, including AC equipment, be screened or placed out of view of the street. Confirm with the Permit Center before choosing a side-yard or front location.
Does Pasadena need more cooling than central Los Angeles?
Yes. NOAA's Pasadena station averages 74.1 days a year at 90 °F or above and an 88 °F average summer high, against 4.8 days and 74.6 °F at LAX.
Are mini-splits common in Pasadena?
They suit much of the housing: 27% of Pasadena homes were built before 1940 and many older houses never had ducts. PWP rebates mini-split heat pumps per ton.
Next step
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- 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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