Orange County service area
HVAC Services in Costa Mesa, CA
Costa Mesa blends Eastside cottages, Mesa Verde's classic 1960s tracts, and the busy commercial energy around South Coast Plaza — a true cross-section of Orange County buildings. United Heating & Air Conditioning has served them all for 25 years.
- 25 Years in Business
- 24/7 Emergency Service
- CA C-20 License #1094200
- Parts & Labor Guarantee
- Lifetime Guarantee
- Discounts Available
A contractor that knows Costa Mesa
Close enough to the coast for mild summers but inland enough for real heat spikes, Costa Mesa homes increasingly want efficient cooling added to houses that never had it — one of our specialties.
Local insight
Costa Mesa's Eastside and Mesa Verde tracts are ideal heat-pump conversion territory — modest square footage, aging furnaces, and a mild climate where a single efficient heat pump handles both seasons beautifully.
Why Costa Mesa calls United Heating & Air Conditioning
- 25 years serving LA & Orange County
- Licensed C-20 HVAC contractor
- 24/7 emergency response
- Parts & labor guarantee
- Lifetime guarantee on installations
- Discounts available — ask when you call
Licensed C-20 work in Costa Mesa — honest recommendations, guaranteed results, since 2001.
HVAC services available in Costa Mesa
HVAC Emergency in Costa Mesa?
No heat. No cooling. No waiting until morning.
We answer 24 hours a day, 7 days a week — nights, weekends, and holidays — across Costa Mesa and all of Los Angeles County and Orange County.
Licensed & Accountable
A state-licensed contractor that stands behind the work
United Heating & Air Conditioning holds the CA State Warm-Air HVAC License C-20 #1094200 — the California license classification specifically for warm-air heating, ventilation, and air conditioning. 25 years in business, every job covered by our parts & labor guarantee, and our installations backed by a lifetime guarantee.
- 25 years serving LA & Orange County
- 24/7 emergency availability
- Parts & labor guarantee
- Lifetime guarantee on our installations
HVAC in Costa Mesa — common questions
Is a heat pump a good fit for a Costa Mesa home?
Often the best fit in OC. Costa Mesa's mild coastal-adjacent climate is exactly where heat pumps shine — one efficient system replacing an old furnace while adding the AC the home never had.
Do you serve businesses near South Coast Plaza and SoBeCa?
Yes — we service light commercial HVAC across Costa Mesa's retail, restaurant, and creative spaces alongside our residential work.
Need HVAC service in Costa Mesa?
Call (818) 817-6005 — 24/7, including emergencies — or send the form and we'll get back to you fast.
Call (818) 817-6005CA C-20 License #1094200 · 25years in business · Parts & labor guarantee
Request service online
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