Cost Guide
HVAC Costs in Southern California 2026
Based on LA/Orange County licensed HVAC contractor rates. Prices vary by system size, brand, and duct condition.
| Type | Size | Timeline | Estimated Cost |
|---|---|---|---|
| Central AC unit replace (2.5 ton) | Per unit | 1–2 days | $5,500 – $10,000 |
| Central AC unit replace (4 ton) | Per unit | 1–2 days | $7,500 – $14,000 |
| Full HVAC system (AC + furnace) | Per system | 2–4 days | $12,000 – $22,000 |
| Mini-split (single zone) | Per unit | 1 day | $3,000 – $6,500 |
| Mini-split (4-zone system) | Per system | 2–4 days | $9,000 – $18,000 |
| Ductwork replacement | Per sq ft | 2–5 days | $3,500 – $8,000 |
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Common Questions
What homeowners ask
What license does an HVAC contractor need in California?
HVAC contractors must hold a C-20 (Warm-Air Heating, Ventilating and Air-Conditioning) license from the CSLB. This covers installation, repair, and maintenance of heating and cooling systems. Verify at cslb.ca.gov — unlicensed HVAC work is particularly dangerous due to gas line and refrigerant handling.
Do I need a permit to replace my AC unit in Los Angeles?
Yes. AC unit replacements require a mechanical permit in most LA County cities. Your C-20 licensed contractor should pull the permit and schedule the required inspection. This also ensures the replacement unit meets California's Title 24 efficiency standards.
What size AC unit do I need for my Southern California home?
In Southern California, a rule of thumb is 1 ton of cooling per 500–600 sq ft for a well-insulated home. However, proper sizing requires a Manual J load calculation that accounts for your home's insulation, window area, sun exposure, and ceiling height. An undersized unit runs constantly; an oversized unit short-cycles.
Are there rebates for HVAC upgrades in Southern California?
Yes. SoCalGas and SCE offer rebates of $200–$800 for high-efficiency HVAC systems (SEER 16+). The federal 25C tax credit provides 30% of installation cost (up to $600) for qualifying energy-efficient equipment. Your C-20 contractor should provide manufacturer documentation for rebate applications.
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