Commercial HVAC: What Rooftop Units, Service Contracts, and Controls Cost — and Who to Trust

The clearest tell is the contractor's license CLASS, not just that they hold one. In Texas a TDLR Air Conditioning & Refrigeration (ACR) Class A license is unlimited, while Class B is capped at 25 tons of cooling / 1.5 million BTU/hr of heating; Florida draws the same line under Fla. Stat. 489.105 — a Class A air-conditioning contractor is unlimited, a Class B is limited to 25 tons cooling / 500,000 BTU heating in any one system. Above those thresholds you are in commercial territory and need the unlimited (Class A) contractor. Beyond licensing, look for building-automation capability (Tridium Niagara certification, the credential Division 25 controls specs require), independent test-and-balance certification (AABC, which prohibits affiliation with the installing contractor — the strongest objectivity signal — or NEBB/TABB), a Certificate of Insurance and bonding that property managers require, and commercial manufacturer authorization. EPA 608 certification is a federal baseline every refrigerant tech holds — it does NOT distinguish a commercial specialist, since residential AC is also Type II.

Yes, and it is tiered by system capacity. Texas regulates the trade through TDLR's Air Conditioning & Refrigeration program, where the Class A endorsement allows any size and Class B is limited to 25 tons / 1.5 million BTU/hr. Florida licenses air-conditioning contractors through the Construction Industry Licensing Board under Fla. Stat. 489.105, splitting Class A (unlimited) from Class B (25 tons cooling / 500,000 BTU heating per system). Arizona regulates commercial mechanical work through the Registrar of Contractors (ROC). On top of the state license, federal law requires EPA Section 608 certification for anyone who handles refrigerant. Verify the Class A / unlimited license plus a current Certificate of Insurance before hiring for any rooftop, chiller, or multi-system job.

Commercial rooftop is quoted by tonnage, and installed packaged units run roughly $1,300–$3,000 per ton once you account for the crane, curb adapter, and rooftop labor a residential changeout never involves. In practice a 3–5 ton light-commercial unit installs for about $6,500–$15,000, a 7.5–10 ton for about $12,000–$28,000, and a 15–20 ton for about $22,000–$45,000. A rooftop diagnostic or service call typically runs $150–$500 (higher than residential because of the lift and roof access), and a preventive-maintenance service contract is usually $400–$1,200 per rooftop unit per year. These are 2026 light-commercial ballparks; chiller, large-VRF, and full building-automation projects are bid per-project and sit well above this scale.

A commercial PM agreement is a recurring contract — typically quarterly or seasonal visits — covering scheduled maintenance, full system inspections, refrigerant management and documentation, filter and belt service, and priority or after-hours emergency response, often with asset-replacement planning for aging rooftop units. For a property manager or facility manager it is baseline economics: it caps unplanned downtime, keeps refrigerant records compliant, and moves you to the front of the dispatch queue during a summer peak when call volume spikes. The honest test of a good contract is whether it specifies the visit frequency, the tasks per visit, and the response-time commitment in writing — vague 'maintenance plans' that don't are the ones to avoid.