AC replacement in Arizona typically costs $7,500 to $12,500. A typical 3 ton replacement runs $7,500 to $12,500 installed. High efficiency and variable speed systems, larger tonnage, and rooftop package units with crane service run higher. These ranges match the New AC Unit Cost Calculator. Compare local quotes by sharing your ZIP and the issue.
Price range
| Service | Low | Typical range | High |
|---|---|---|---|
| AC replacement | $5,000 | $7,500 to $12,500 | $20,900+ |
Prices are estimates only. Actual quotes vary by diagnosis, parts, labor, access, equipment, urgency, code requirements, permits, and contractor.
SEER2 requirements in the Southwest
Since the 2023 federal efficiency standards took effect, Arizona sits in the Southwest region, which enforces its own minimum ratings at the point of installation. A new split system under 45,000 BTU (roughly 3.5 tons and smaller) must be rated at least 14.3 SEER2. Systems at or above 45,000 BTU must be rated at least 13.8 SEER2.
This matters to your budget because the old builder grade equipment that used to set the entry price can no longer be installed here. The baseline system Arizona homeowners can legally buy is more efficient, and it costs more than the pre 2023 entry tier. Expect the lowest legitimate quote to start higher than older price guides suggest, and treat any unusually cheap bid as a reason to ask for the exact model and SEER2 rating in writing.
Stepping above the minimum is optional. Higher SEER2 and variable speed equipment raises the equipment cost but lowers summer run cost, which is why we show Good, Better, and Best pricing rather than one number.
AC replacement cost by system size
Size is the single biggest driver of installed price. These are the same numbers the New AC Unit Cost Calculator returns, so the tool and this page always agree.
| System size | Typical home size | Good | Better | Best |
|---|---|---|---|---|
| 2 ton | 900 to 1,200 sq ft | $5,000 to $8,400 | $6,000 to $10,000 | $7,500 to $12,500 |
| 2.5 ton | 1,200 to 1,500 sq ft | $6,300 to $10,500 | $7,500 to $12,500 | $9,400 to $15,700 |
| 3 ton | 1,500 to 1,800 sq ft | $7,500 to $12,500 | $9,000 to $15,000 | $11,300 to $18,800 |
| 3.5 ton | 1,800 to 2,100 sq ft | $8,800 to $14,600 | $10,500 to $17,600 | $13,100 to $21,900 |
| 4 ton | 2,100 to 2,400 sq ft | $10,000 to $16,700 | $12,000 to $20,100 | $15,000 to $25,100 |
| 5 ton | 2,400 to 3,000 sq ft | $12,500 to $20,900 | $15,000 to $25,100 | $18,800 to $31,400 |
Ranges are complete installed prices for a standard single system replacement in Arizona, including equipment, labor, permit allowance, removal and disposal of the old unit, standard electrical and condensate connections, a standard thermostat, and startup. Rooftop package units add a crane allowance. Two system homes and commercial rooftop units price separately.
Prices are estimates only. Actual quotes vary by diagnosis, parts, labor, access, equipment, urgency, code requirements, permits, and contractor.
Rooftop package units usually need a crane
In Phoenix, Mesa, and much of the Valley, a large share of homes use rooftop package units instead of a split system with a ground level condenser. Replacing one means lifting the old unit off the roof and setting the new one in place, so the install typically requires a crane and a road or driveway staging spot. That crane call is a real line item and it adds to the total installation cost above the equipment price.
Ask whether the crane, curb adapter, and any roof curb or duct transition work are included in the quoted price, or listed as extras added later.
What affects the price
- System size (tonnage) and efficiency (SEER2)
- Single-stage vs variable-speed equipment
- Ductwork condition and modifications
- Permit and code requirements
- Brand and warranty coverage
Common reasons homeowners need this
- Repeated expensive repairs
- System older than 12 to 15 years
- Rising energy bills
- R-22 (old refrigerant) systems
- Failed compressor
Smart questions before approving work
Smart questions to ask before approving work
- Ask for a written estimate
- Ask whether a diagnostic fee applies
- Ask whether after-hours fees apply
- Ask about the parts and labor warranty
- Ask about permit requirements where relevant
- Verify the contractor's Arizona license
- Compare more than one quote for expensive repairs
Frequently asked questions
How much does ac replacement cost in Arizona?+
AC replacement in Arizona typically costs $7,500 to $12,500 (low $5,000, high $20,900+). A typical 3 ton replacement runs $7,500 to $12,500 installed. High efficiency and variable speed systems, larger tonnage, and rooftop package units with crane service run higher. These ranges match the New AC Unit Cost Calculator.
Are these prices guaranteed?+
No. These are estimates only. Your actual price depends on diagnosis, parts, labor, access, urgency, permits, and the contractor.
By city
Page Summary
- Topic
- AC replacement
- Location
- Arizona (statewide)
- Best for
- Homeowners researching fair pricing
- Primary action
- Submit a quote request
- Related services
- See related cost guides
- Last reviewed
- June 2026
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Last reviewed: June 2026
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