What Does a New AC System Cost?
A new central air conditioning system typically costs $6,000 to $15,000 installed, averaging around $8,500 for a standard single-family home. That covers replacing a central AC in a home that already has usable ducts, equipment and labor included. The range reflects differences in system size, efficiency rating, and installation complexity.
Baseline Efficiency System: $7,600 to $10,100
A central split system AC (outdoor condenser plus indoor air handler) at the minimum SEER2 efficiency for your climate region, properly sized for the home, costs $7,600 to $10,100 installed for most homes up to 2,000 square feet. This range assumes existing ductwork in good condition, and a quote near $3,800 to $5,650 is an outdoor condenser swap only, not a full system. Budget brands (Goodman, Ameristar) at the lower end; mid-grade brands (Carrier, Lennox, Trane entry-level) toward the upper end of this range.
High-Efficiency System: $12,400 to $14,900
Systems with SEER2 ratings of 18 to 25 (high-efficiency two-stage or variable-speed systems) cost $12,400 to $14,900 installed. Two-stage compressors and variable-speed air handlers reduce energy consumption, dehumidification is more effective, and comfort is improved the system runs longer at lower capacity rather than cycling on and off. The premium over a baseline system is roughly $4,800 upfront but recovers partially through lower operating costs over the system’s life. ENERGY STAR publishes certified efficiency ratings for heating and cooling equipment, which is the cleanest way to compare models.
Ductwork and Installation Complexity: Added Cost
New ductwork installation (if existing ducts are absent, poorly designed, or in poor condition) adds $1,500 to well over $20,000 to the base system cost depending on home size and duct layout complexity, which is why a first-time install in a home with no ducts lands above the $15,000 ceiling. Homes requiring electrical panel upgrades (for a larger system’s amperage requirements), refrigerant line modifications, or significant structural penetrations for new equipment placement add $1,500 to $4,000 in additional installation cost. Always confirm what is included in a quote equipment-only quotes do not reflect the actual installed price. (For more on this, see Questions to Ask Before Getting a New AC System.)
AC Installation Cost at a Glance
Unit size and tonnage: Larger homes need larger systems, which cost more.
Efficiency rating (SEER2): Higher-efficiency units cost more upfront but lower bills over time.
Ductwork and installation complexity: New or modified ductwork raises the total significantly.
Overall range: $6,000 to $15,000, averaging $8,500 for a standard replacement in a home with usable ducts.
Planning Your Project Budget
The cost ranges in this article are based on industry data and are intended as planning benchmarks, not fixed prices. The actual cost for your project depends on your specific home, your local labor market, the current price of materials, and the scope the contractor confirms after a site inspection.
Always get at least two written quotes on equivalent defined scope before committing to any home services project. Wide price variation between quotes usually reflects differences in material quality, scope completeness (what is included and what is not), or contractor overhead and experience level rather than simple price competition.
Use the cost data in this article to ask better questions during the quoting process: What material is included? What does that per-square-foot or per-linear-foot rate include and exclude? Are permits, cleanup, and disposal included? What is the warranty on labor? These questions turn a quote into a comparable basis for decision-making.
Working With a Contractor on This Project
Getting the right outcome on any home services project starts before the work begins. A few consistent practices make the difference between a smooth project and a frustrating one.
Get at least two or three quotes. A single quote gives you no basis for comparison. Two or three quotes reveal the market rate for the work, expose scope differences between bidders, and let you assess contractor communication quality before any commitment is made. The lowest bid is not automatically the best value if the scope is thin or the materials are underspecified.
Ask for licenses and insurance before work starts. Verify current general liability insurance and, for any work involving workers on your property, workers compensation coverage. Licensing requirements vary by state and trade; confirm the specific requirements in your jurisdiction. A licensed contractor who carries appropriate insurance protects both parties if something goes wrong during the project.
Get the scope in writing. A written proposal that specifies materials, labor scope, timeline, what is included (permits, cleanup, disposal), and warranty terms is the foundation of a professional engagement. Verbal agreements on any of these points invite misunderstanding. For any project over $500, written scope is non-negotiable.
Clarify the payment schedule upfront. A reasonable payment schedule ties major payments to project milestones: a deposit at signing, a payment at material delivery or project start, and a final payment at completion after a walkthrough confirms satisfaction. A contractor who requires full payment upfront before work begins is a red flag in any trade.
Cost figures on this page were checked against published pricing on September 2, 2026. How we source cost data.