Commercial AC unit replacement cost typically ranges from $7,500 to $45,000 for a common rooftop or split-system project, with larger or more complex installations exceeding $100,000. System capacity, equipment type, crane access, ductwork changes, controls, and local labor rates have the biggest effect on the final quote.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Installed replacement | $7,500 | $22,000 | $100,000+ | Small packaged unit through large-capacity project |
| Packaged rooftop unit | $1,800 per ton | $2,700 per ton | $4,000+ per ton | Equipment and standard installation |
| 5-ton rooftop unit | $8,000 | $12,500 | $18,000 | Typical small commercial replacement |
| 10-ton rooftop unit | $14,000 | $21,000 | $32,000 | Price rises with efficiency and access needs |
| 20-ton rooftop unit | $27,000 | $42,000 | $65,000 | May require crane and electrical work |
What a Commercial Rooftop AC Replacement Usually Costs
A straightforward commercial replacement usually costs $1,800-$4,000 per ton installed. This estimate generally assumes a packaged rooftop unit, similar capacity to the existing system, standard efficiency, usable curb and duct connections, and ordinary access. A 5-ton unit commonly totals $8,000-$18,000; a 10-ton unit, $14,000-$32,000; and a 20-ton unit, $27,000-$65,000.
Across small and midsize projects, a practical planning average is about $22,000, though that figure is not a universal quote. A simple like-for-like replacement in a lower-cost market can fall below it; high-efficiency equipment, difficult roof access, controls upgrades, or multiple units can push the total much higher.
Commercial split systems can cost $6,000-$18,000 for smaller 3- to 5-ton installations and $15,000-$40,000 for larger systems, before extensive duct or electrical work. Variable-refrigerant-flow and other multi-zone systems may run $20,000-$100,000 or more, depending on capacity, indoor units, piping length, and controls.
Assumptions: U.S. dollars, standard packaged equipment, replacement of one unit, normal access, and no major structural or duct redesign. For early budgeting, use installed cost per ton and then add allowances for access, controls, and building-specific work.
How Equipment, Labor, and Crane Charges Shape the Quote
Quotes divide the job among equipment, installation labor, lifting and delivery, and any required permit or disposal work. Some contractors combine these into one installed price; others itemize them. The ranges below represent typical contributions to a single-unit replacement, not guaranteed line-item prices.
| Quote item | Typical range | Pricing basis | What changes it | Commonly included |
|---|---|---|---|---|
| AC equipment | $5,000-$35,000 | $900-$2,200 per ton | Capacity, efficiency, brand, options | Packaged unit or condenser and coil |
| Labor | $2,000-$9,000 | $75-$150 per technician-hour | Crew size, duration, site conditions | Disconnect, set, connect, start-up |
| Crane and rigging | $500-$4,000 | $500-$1,500 per lift for common jobs | Roof height, street access, lift plan | Crane, operator, or rigging crew |
| Permits and inspections | $150-$2,000 | Local fee schedule | Jurisdiction and project scope | Mechanical or electrical permit |
| Delivery and disposal | $300-$2,500 | Per unit or haul | Distance, weight, refrigerant handling | Freight, old-unit removal, recycling |
Equipment is often the largest single expense, but labor can rise quickly when technicians must alter curb adapters, replace disconnects, or work around occupied spaces. A labor estimate may use ; a four-person crew working 8-12 hours at $75-$150 per technician-hour represents $2,400-$7,200 before specialty subcontracting.
Check whether the quote includes start-up, refrigerant handling, curb modifications, disposal, and crane service before comparing totals. An apparently cheaper equipment-only offer may exclude several thousand dollars of installation work.
Why Tonnage, Efficiency, and Roof Access Change the Price
Capacity is a major driver, but tonnage alone does not determine a suitable replacement. A 5-ton system serves a smaller load than a 20-ton unit, yet the larger unit does not always cost exactly four times as much. Equipment configuration, electrical requirements, controls, and the number of compressors all affect the relationship between capacity and price.
Efficiency also changes the upfront amount. Standard commercial equipment may start near $1,800-$2,700 per ton installed in a simple replacement, while higher-efficiency models can push comparable work toward $3,000-$4,500 per ton. Compare rated performance and operating schedules, not only the equipment label; longer daily run times can make efficiency differences more financially relevant.
Roof access can add $500-$4,000 for a typical crane or rigging plan, and unusual lifts may cost more. A unit on a tall building, behind restricted access, or requiring a street closure can need extra crew time and permits. Roof curb mismatch can add roughly $500-$3,000 for adapters or related alterations; structural repairs are separate.
Electrical and controls scope is another source of variation. Replacing a disconnect or short conduit run may add $300-$1,500, while a new control interface, thermostat network, or building-management-system integration can add $1,000-$8,000 or more. If the new unit differs substantially from the old model, wiring, economizer, and sensor compatibility should be confirmed in writing.
Capacity changes above 10 tons, roof-lift conditions, and controls compatibility are useful checkpoints when reviewing a commercial AC estimate. A building load calculation should support a capacity change, especially when the proposal increases tonnage or serves a different occupancy pattern.
Regional Labor Rates and Commercial HVAC Prices
Regional differences commonly shift installed prices by about 10%-25% from a middle-of-market estimate. High-cost metropolitan areas in the Northeast, West Coast, and parts of the Mountain West may sit 10%-25% above national planning ranges because of wages, permitting, insurance, and access constraints. Smaller markets in the Midwest and South can be 5%-15% below those estimates, although limited contractor availability can offset the savings.
Urban projects may also face parking restrictions, street permits, union labor requirements, or limited crane windows. Suburban and rural sites often have easier equipment access, but long travel distances or fewer qualified commercial contractors can increase mobilization charges. Local climate can affect equipment selection and required controls, particularly where cooling demand is intense or shoulder seasons are long.
For a 10-ton replacement with a middle-market baseline of $21,000, a 15% regional premium would place planning cost near $24,150 before unusual site work. A 10% discount would put it near $18,900. These are comparison examples, not fixed regional prices; quotes should be based on local labor and the actual building conditions.
Use regional percentages to screen an early budget, then compare at least three local bids with the same capacity and installation scope. A low local quote may omit permits, disposal, lift charges, or controls that another contractor has included.
How Long a Rooftop Unit Swap Takes and What Labor Covers
A like-for-like replacement may take one workday on site when the unit is accessible and connections match. A small system can require 10-16 crew-hours; a 10-ton replacement may take 16-32 crew-hours; larger or complicated jobs can require 40-80 crew-hours or multiple visits. These are total crew-hours, not elapsed hours for one worker.
Typical labor rates fall around $75-$150 per technician-hour, with higher rates possible for emergency work or specialty controls. The crew generally isolates power, recovers refrigerant, disconnects the old unit, rigs and sets the replacement, connects electrical and refrigerant components, and completes testing. A crane window may add scheduling limits even when the physical replacement takes less than a day.
Work in an occupied restaurant, medical office, or production space may require after-hours labor to limit disruption. After-hours charges can add 10%-30% to labor, depending on the contractor and schedule. A project involving several units may take multiple days but can sometimes reduce repeated mobilization charges if the work is bundled.
Ask the contractor to separate crew-hours, hourly rates, overtime, and crane time so labor differences are visible. The schedule should also identify when cooling will be unavailable and whether temporary cooling is included.
Three Commercial AC Replacement Quotes by Building Scope
A small office replacing one 5-ton rooftop unit might receive a $10,500 quote. A sample breakdown could include $6,200 equipment, $2,500 labor for a three-person crew over about 11 hours, $900 crane service, and $900 for delivery, disposal, and basic permit charges. That equals about $2,100 per ton, assuming the curb and electrical connection remain usable.
A retail building replacing a 10-ton packaged unit might receive a $23,800 estimate. For example, equipment could account for $13,500, labor could total $5,000 for a four-person crew over roughly 10 hours, crane and rigging could add $2,000, and permits, haul-away, and start-up could add $3,300. The resulting price is about $2,380 per ton, before optional controls upgrades.
A light-industrial site replacing a 20-ton unit might see a $51,000 proposal: $29,000 for equipment, $11,000 in labor for a five-person crew over about 15 hours, $4,000 for a difficult lift, and $7,000 for electrical changes, permits, and removal. At roughly $2,550 per ton, this example reflects more involved access and site work, not a standard 20-ton rate.
Assumptions: Illustrative middle-market quotes, standard cooling equipment, and no major roof reconstruction. These examples show why comparing total price per ton is useful but insufficient without matching the included work.
Which Extras Can Add Thousands to a Replacement
Old-unit removal and recycling commonly add $300-$2,500, depending on size, refrigerant recovery, roof access, and hauling distance. A crane may be separately billed at $500-$4,000 for ordinary lifts; difficult urban access or specialized rigging can exceed that range. Confirm whether the quote includes the operator, traffic control, and a second lift if needed.
Damaged roof curbs, duct transitions, or flashing can add $500-$5,000, while extensive roofing or structural repairs may cost substantially more and involve another trade. Duct modifications may add $1,000-$10,000 depending on length and access. A proposal should distinguish necessary repairs from optional improvements and identify the party responsible for weatherproofing the roof opening.
New economizers, smoke detectors, sensors, thermostats, and control integration can add $300-$8,000, depending on the equipment and building system. Electrical service upgrades can add $1,000-$10,000 or more when the existing circuit is undersized or code work is required. Temporary cooling, expedited procurement, and after-hours access also create charges that may not appear in a standard replacement price.
Request written allowances for roof, electrical, and control conditions that cannot be verified before removal. A defined allowance helps prevent an unexpected change order from blending necessary repairs with discretionary upgrades.
How to Lower Commercial AC Replacement Cost Without Cutting Scope
Keep the replacement scope clear and comparable. Give each contractor the existing unit model, capacity, voltage, curb dimensions, control requirements, and operating schedule. Ask bidders to price the same equipment class and state whether the quote includes crane work, refrigerant recovery, disposal, permits, testing, and warranty. This reduces the risk of choosing a low bid that leaves essential work out.
Replace only what has failed when compatible components remain serviceable, but compare repair and replacement costs for the full system. A compressor or controls repair may cost $1,500-$8,000, while a major refrigerant leak or repeated breakdowns can make replacement more practical. The decision should consider equipment age, parts availability, energy use, and the chance of another expensive failure.
Scheduling a planned replacement during a contractor’s less busy period may improve appointment availability and reduce emergency premiums. Avoiding peak-season breakdowns can also prevent rush charges, temporary cooling fees, and business interruption. If several rooftop units are nearing end of life, bundling them may reduce repeated crane mobilization, though each unit should still be itemized.
Choose efficiency based on operating hours and expected ownership period rather than assuming the highest-rated model is always best. Skip upgrades that do not match building needs, but do not reuse a damaged curb, unsafe disconnect, or incompatible control simply to lower the upfront quote. The most reliable savings come from competitive, scope-matched bids and planned timing, not from omitting required installation work.