HVAC installation in Los Angeles is increasingly driven by two forces: the transition away from gas-powered systems (California’s building electrification push), and the extreme heat events that have made air conditioning non-negotiable in parts of the San Fernando Valley, San Gabriel Valley, and Inland regions that previously went without. This guide covers the real cost of HVAC installation in Los Angeles in 2026.
What you get: One outdoor compressor unit and one indoor wall-mount air handler. Covers a single room or open-plan area (350–700 sq ft). No ductwork required. Popular for: room additions (new primary suite), garage conversions (ADUs), home offices, and older homes without existing duct infrastructure. California Energy Commission approved heat pump mini-splits qualify for state and utility rebates of $1,000–$3,000.
What you get: One outdoor unit serving 2–5 indoor air handlers throughout the home. Each zone is independently controlled. Fully ductless — ideal for older craftsman bungalows, Spanish Colonial homes, and any structure without existing forced-air ducts. For a 4-zone system in a 1,800 sq ft home: $12,000–$16,000 installed.
What you get: New central air conditioner and furnace (or heat pump) in homes with existing ductwork. For homes that already have forced-air ducts in good condition, central air replacement is more cost-effective than a full mini-split conversion. System sizing and efficiency rating (SEER) selection affects cost and long-term operating efficiency.
What you get: New central forced-air system plus complete ductwork installation or replacement. Required for homes with no existing ductwork or deteriorated ducts (common in 1920s–1940s Los Angeles homes). More invasive — ductwork typically requires attic, crawl space, or wall access throughout the home.
Single-zone mini-split is the standard HVAC solution for Los Angeles garage conversion ADUs. Every APLA ADU project includes a mini-split as part of the base construction budget.
Single-zone mini-split: $3,500–$7,500 installed. Multi-zone mini-split: $8,500–$18,000. Central air replacement (existing ducts): $6,500–$15,000. Full central air with new ductwork: $18,000–$40,000. California heat pump rebates of $1,000–$3,000 can reduce upfront costs significantly.
For homes without existing ductwork (common in pre-war LA): mini-split is almost always more cost-effective and disruptive than adding new ductwork. For homes with existing ductwork in good condition: central air replacement is typically more cost-effective than converting to mini-split. For room additions and ADUs: mini-split is the standard solution.
APLA (CA Lic #1136359) installs HVAC systems as part of full remodel, addition, and ADU projects throughout Los Angeles. HVAC is coordinated with all other construction trades for new additions and renovations. Call (818) 818-4419 for a free consultation.
Call: (818) 818-4419
Email: info@aplaconstruction.com
CA General Contractor License #1136359
Electrical Contractor Los Angeles | General Contractor Los Angeles | ADU Contractor Los Angeles