6 AC Installation Contractors in Altadena, CA
Top-Rated AC Installation Contractors in Altadena
Prime Air Mechanical Inc.
“All 42 reviews award 5 stars, with multiple reviewers specifically naming Roger for his non-pushsy sales approach and responsiveness. Customers consistently…”
Robert's AC & Heating Repair Altadena
“Eight of eight clients awarded five-star ratings, with consistent descriptors across reviews including quick, competent, professional, and kind. Multiple…”
All AC Installation Contractors (6 total)
Air Conditioning Solutions
“Three of twelve reviewers award five stars, praising technical knowledge and thoroughness. One reviewer cites…”
Top Choice Heating and AC Repair
“All four client reviews award five stars, with every testimonial mentioning positive outcomes: reliable…”
AC Installation Costs in Altadena
New central AC installation costs in Altadena, by system type and brand.
| Service | Low | Average | High |
|---|---|---|---|
Window unit | $138 | $322 | $644 |
Ductless mini-split (single zone) | $1,840 | $4,140 | $7,360 |
Central AC replacement (existing ducts) | $3,220 | $5,980 | $11,040 |
Central AC new install (with ductwork) | $6,440 | $11,040 | $18,400 |
Carrier (residential) | $3,496 | $5,704 | $9,660 |
Trane (residential) | $4,600 | $8,096 | $12,512 |
Lennox (residential) | $3,220 | $5,980 | $11,040 |
Rheem (residential) | $2,944 | $5,060 | $8,280 |
Prices reflect Pacific coast metro averages compiled from published industry cost guides, contractor surveys, and regional labor data. Last updated: April 2026.
AC Installation in Altadena, CA: What to Expect
Altadena sits in the San Gabriel Valley foothills north of Los Angeles, where Mediterranean warmth gives way to Santa Ana wind events pushing summer temperatures past 100 F. The inland elevation creates genuinely variable cooling needs that the six licensed contractors serving this area understand firsthand. With an average rating of 4.0 across 82 client reviews, these professionals handle everything from new construction AC Installation in Altadena to system replacements in homes that have run decades without proper cooling capacity.
Homeowners have multiple system options at different price points. A window unit runs $138 to $644, while a ductless mini-split for a single zone costs $1,840 to $7,360. Central AC replacement using existing ductwork ranges from $3,220 to $11,040. California requires HVAC contractors to hold a C-20 Warm-Air Heating, Ventilating, and Air-Conditioning license from the CSLB, which means at least four years of recent HVAC experience before they can legally install or replace systems. This credentialing ensures contractors understand load calculations, refrigerant handling, and local code compliance.
Reviewers consistently praise specific technicians. Roger at Prime Air Mechanical earns recognition for his non-pushy sales approach and competitive pricing. At Metropolitan Heating & AC Repair, multiple clients mention Alex, Christian, Joab, and Hector by name, with emergency service appearing prominently. One reviewer describes Hector restoring a furnace after a weekend breakdown, while others characterize the team as quick, competent, professional, and kind.