Last updated: April 23, 2026
Commercial HVAC service in San Diego County ranges from a $149 service call to a $25,000 rooftop unit replacement on a larger building. Most repair calls land well under $2,500. A full RTU replacement is the big-ticket item, priced by tonnage, and maintenance contracts are priced by square footage rather than a flat rate.
Camp Pendleton-area HVAC work splits two ways. On-base housing runs through Lincoln Military Housing's in-house service operation, not direct homeowner permitting. Off-base rental property work in Oceanside and Fallbrook, driven heavily by PCS-cycle tenant turnover, is typically fast repair-and-turnover scope rather than full replacement, priced for quick diagnosis and same-week completion between tenants.
Carlsbad's business parks and Oceanside's retail corridors see rooftop units age faster in the marine-influence zone, which is why preventive maintenance contracts carry more weight here than a reactive repair-only approach.
| Item | Typical cost | Notes |
|---|---|---|
| Commercial service visit | From $149 | Diagnostic and minor repair on rooftop or packaged units |
| Rooftop unit (RTU) repair | $400 - $2,500 | Most common repair range, covers motors, boards, and refrigerant work |
| RTU replacement, 3 to 5 ton | $8,000 - $18,000 | Typical for a small retail space or office suite |
| RTU replacement, 7.5 to 10 ton | $15,000 - $25,000 | Typical for a larger retail, restaurant, or warehouse space |
| Preventive maintenance contract | Priced by square footage | Quoted per building, not a flat per-unit rate |
| After-hours or weekend service call | Standard rate | Scheduled around your business hours, no separate overtime surcharge |
Ranges reflect Camp Pendleton and North Coastal San Diego. Your exact figure depends on the factors below. We quote flat-rate before starting.
A preventive maintenance contract catches most rooftop unit failures before they turn into an emergency call during business hours, and it's priced by square footage so a small suite doesn't pay the same rate as a large warehouse. SDG&E offers commercial rebate programs for high-efficiency RTU replacements, and those figures depend on tonnage and efficiency tier, so we confirm the real number for your building rather than quoting one up front.
On-base housing is serviced through Lincoln Military Housing's own contractor system, so that work doesn't route through us directly. What we handle regularly is off-base rental property maintenance in Oceanside, Fallbrook, and Vista, largely PCS-cycle turnover work for landlords and property managers with tenants tied to Camp Pendleton, where fast diagnosis and quick turnaround between move-outs matters most.
Carlsbad's business parks and Oceanside's retail corridors see rooftop units age faster in the marine-influence zone, which is why preventive maintenance contracts carry more weight here than a reactive repair-only approach.
A service call starts at $149. Most repairs run $400 to $2,500. A full rooftop unit replacement runs $8,000 to $25,000 depending on tonnage, with larger buildings needing multiple units.
Yes, for most property owners and businesses. A maintenance contract is priced by square footage and catches problems during a scheduled visit instead of an emergency call that disrupts business hours.
A standard service visit at $149 covers diagnostics and minor adjustments. Most straightforward repairs, like a failed contactor or a refrigerant top-off, stay under $1,000.
A full rooftop unit replacement is the largest expense, running $8,000 to $25,000 depending on tonnage. Buildings with multiple RTUs sometimes replace them in phases to spread out the cost.
Flat-rate pricing, confirmed before any work starts. Same-day scheduling on most calls.