A new AC unit for a 1,200-square-foot house typically costs $4,000-$12,000 installed, with many standard central-air projects near $7,500. Final pricing depends on the system’s cooling capacity, whether ducts need work, equipment efficiency, local labor rates, and whether the job is a replacement or a first-time installation.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Central AC installed | $4,000 | $7,500 | $12,000 | Existing usable ducts; equipment and installation |
| Typical system size | 1.5 tons | 2 tons | 2.5 tons | Final size requires a heat-load calculation |
| New ductwork | $2,000 | $4,500 | $8,000+ | Can raise the project total substantially |
| Equipment efficiency | 14-15.2 SEER2 | 16-17 SEER2 | 18+ SEER2 | Higher-efficiency units usually cost more upfront |
Installed AC Prices for a 1,200-Square-Foot Home
For a straightforward central AC replacement, a basic single-stage system commonly runs $4,000-$6,500 installed. A midrange system with standard efficiency and routine installation is often $6,000-$9,000, while premium or complex projects can reach $9,000-$12,000 or more. These estimates assume a typical U.S. home, accessible equipment, and existing ducts in serviceable condition.
A reasonable planning budget is $6,000-$9,000 when the home already has compatible ductwork. A rough equipment-only allowance is $2,000-$5,500, but homeowners should compare installed quotes because equipment, labor, refrigerant-line work, startup, and warranty terms differ.
Square footage alone does not determine capacity. Climate, insulation, ceiling height, window exposure, air leakage, and layout affect the required tonnage. A contractor should size the system using a load calculation rather than simply matching the old unit.
How Condenser, Coil, and Labor Shape the Quote
Installed estimates combine equipment with trade labor and job-specific charges. The table gives common ranges for a replacement using existing ductwork; costs vary by brand, access, and market. Assumptions: standard equipment, ordinary access, and no major electrical or duct repairs.
| Quote component | Typical range | What it covers | Common price driver |
|---|---|---|---|
| Condenser and indoor coil | $2,000-$5,500 | Outdoor unit and matched evaporator coil | Capacity, efficiency, and equipment tier |
| Installation labor | $1,500-$3,500 | Removal, setting, connection, and startup | Access and installation complexity |
| Refrigerant lines and materials | $300-$1,200 | Lineset, drain, pad, and fittings | Reuse versus replacement of existing parts |
| Permit and inspection | $100-$500 | Local permit and required inspection | City or county rules |
| Removal and disposal | $100-$500 | Old equipment handling | Haul-away requirements and access |
Labor can be estimated as . HVAC labor rates commonly fall around $75-$150 per hour, though many contractors quote a complete job rather than an hourly bill.
Does a 1.5- to 2.5-Ton System Fit?
For 1,200 square feet, an initial comparison often considers roughly 1.5-2.5 tons, or 18,000-30,000 BTU per hour. That range is not a final sizing recommendation: a shaded, well-insulated home in a mild climate may need less capacity than a sunny, leaky home in a hot region.
Ask for a documented load calculation before accepting a tonnage recommendation. Oversizing can cause short cycles, uneven temperatures, and poor humidity control; undersizing can leave the system running continuously during peak heat. A change from a 1.5-ton to a 2.5-ton unit can add roughly $500-$1,500 in equipment and related installation expense, depending on the matched components.
Efficiency also changes the quote. Moving from a basic 14-15.2 SEER2 unit to a 16-17 SEER2 model may add about $500-$1,500. Premium variable-speed equipment can add $1,500-$3,500 or more, with potential energy savings depending on utility rates and usage.
Where Homeowners Can Trim the AC Budget
Keep the project scope clear when requesting bids. Separate the base replacement from optional thermostat upgrades, duct sealing, extended labor plans, and premium controls. Compare the same capacity, efficiency level, warranty, and included work across at least three written quotes.
Reuse sound ducts and compatible electrical connections when a qualified contractor confirms they meet current requirements. Replacing functional components without a specific reason can increase the bill. However, damaged ducts, undersized returns, unsafe wiring, or a mismatched indoor coil can undermine performance, so a low bid that omits needed corrections may not be the lower-cost choice overall.
Ask whether the quote includes the permit, old-unit disposal, refrigerant-line replacement, condensate drain work, startup testing, and warranty registration. Scheduling during a contractor’s less busy period may improve availability, but emergency replacement during a heat wave can limit time to compare bids.
Regional Labor Rates Shift the Installed Price
Market pricing can differ even for similar equipment. As a broad planning adjustment, large coastal and high-cost metro areas may run about 10%-25% above a typical national estimate. Smaller towns and lower-cost regions may come in roughly 5%-15% below it, although travel distance and limited contractor availability can erase that difference.
Climate affects the product choice as well as labor. Hot, humid areas may favor higher capacity or stronger humidity management, while colder regions may place more emphasis on a heat pump rather than a cooling-only AC unit. Local permit requirements and electrical codes can also add several hundred dollars.
What Existing Ductwork Adds to a Replacement
Replacing an AC unit with no duct changes is generally less expensive than installing central cooling in a house that lacks ducts. New ductwork often adds $2,000-$8,000 or more, depending on the number of runs, attic or crawlspace access, insulation, and repairs needed to close or finish openings. Duct sealing or limited repairs may cost about $300-$1,500.
Other possible charges include a new electrical circuit or disconnect, typically $300-$1,500; a condensate pump or drain correction, about $150-$600; and a smart thermostat, roughly $150-$500 installed. These are not automatic requirements, so the estimate should explain why each item is needed.
Three 1,200-Square-Foot AC Quotes Compared
These examples show how scope can change the total. They assume standard access and illustrative regional pricing, not a guaranteed local quote.
- Basic replacement: 1.5-ton, 14.3 SEER2 single-stage system; 8 labor hours at $100 per hour; existing ducts and lines reused where suitable; total about $5,200.
- Typical replacement: 2-ton, 16 SEER2 system; 10 labor hours at $115 per hour; new pad, permit, and routine disposal; total about $7,800.
- Higher-spec installation: 2.5-ton, 18 SEER2 variable-speed system; 14 labor hours at $125 per hour; electrical and duct corrections; total about $11,800.
For a fair comparison, each quote should identify equipment model, capacity, efficiency, labor scope, exclusions, and warranty. A total price without those details makes it difficult to tell whether a lower bid reflects savings or omitted work.