24/7 Emergency Service
AC dies at 11pm in August? Call us. We answer every call, day or night. No third-party call center.
Same-day service · Orange County
CoolHousebyTonight.
Same-day AC repair across Orange County. Family-owned since 2008. Licensed, insured, and ready to roll.
Family-owned since 2008 · No-surprise pricing · 100% satisfaction guarantee
- Homeowner rating
- 4.8★487+ reviews
- Jobs completed
- 5,000+since 2008
- Avg response
- < 2 hrsacross Orange County
- Licensed & insured
- CA Lic.#C20-1024873
0+ years
Family-owned & local
0+
Jobs completed in OC
0.0★
487 Google reviews
CA Lic. #C20-1024873
Licensed, bonded, insured
What we do
HVAC service across Orange County, done right the first time.
From a 3am AC breakdown to a full system replacement — we handle residential and commercial work, with up-front pricing on everything.
AC Repair
Same-day diagnostics and repair. We carry parts for every major brand — Trane, Carrier, Lennox, Goodman, York.
Learn moreAC Installation
High-efficiency systems sized right for your home. Financing up to 60 months, 0% APR available.
Learn moreHeating
Furnace repair, heat pump install, and emergency winter service when the cold snap hits.
Learn moreMaintenance Plans
Twice-yearly tune-ups extend system life by 5+ years and slash energy bills by up to 30%.
Learn moreIndoor Air Quality
Whole-home filtration, UV purifiers, humidity control. Breathe easier — especially during fire season.
Learn moreCommercial HVAC
Restaurants, offices, retail. Rooftop units, RTU replacement, preventive service contracts.
Learn more
Why Coastline
Family-owned. Newport-based. Honest about the work.
Up-Front Pricing
You see the price before we start. No surprise add-ons, no inflated invoices, no high-pressure sales.
Family-Owned Since 2008
Three generations of HVAC pros, headquartered in Newport Beach. Your neighbors, not a national chain.
100% Satisfaction Guarantee
If you're not happy with the work, we fix it free. If you still aren't happy, your money back. Period.
Licensed, Bonded, Insured
California C20 contractor's license #C20-1024873. Fully bonded and insured for your peace of mind.
0% Financing Available
0% APR for 18 months on full system replacements. Same-day approval, no hard credit pull.
Engineered comfort
The difference is in the ductwork.
Most homes have hot rooms and cold rooms because the ducts were never sized correctly. We engineer every install — right-sized runs, balanced airflow, tuned static pressure — so every room hits the temperature on the thermostat.
Right-sized ducts
Manual D calcs — not eyeballed. Every run sized for the room it serves.
Balanced airflow
Every vent gets the CFM it needs. No more freezing bedrooms or sweltering bonus rooms.
Static pressure tuned
We measure and trim. Your system runs quieter, lasts longer, and costs less to operate.
Live system diagram
DuctsAirflow
Your service call, step by step
From your request to a tech at your door — fast.
No call-center hold music. No three-hour wait for someone to circle back. Most weekdays, you have a confirmation in your inbox in under a minute and a tech on your doorstep in under 90.
Tell us what's wrong
Submit the form below or call us 24/7. Name, address, what's going on — under a minute on mobile.
Confirmation in your inbox
A real email lands right away — by name, referencing your service request, with appointment options. No vague “we’ll get back to you.”
Tech at your door
Up-front pricing before we lift a wrench. Same-day appointments most weekdays during business hours.
After-hours emergency? We answer 24/7. Standard rates Mon–Fri, 8am–6pm.
Service area
Serving all of Orange County.
Same-day appointments across coastal and inland OC. Headquartered in Newport Beach — average tech is at your door in under 90 minutes during business hours.
123 Coast Highway, Newport Beach, CA 92660
Cities we cover
- Newport Beach
- Costa Mesa
- Irvine
- Huntington Beach
- Laguna Beach
- Laguna Niguel
- Mission Viejo
- Lake Forest
- Tustin
- Aliso Viejo
- Dana Point
What homeowners say
4.8★ from 487+ Orange County homeowners.
“Our AC died at 8pm on a Friday in August — house was 92 degrees, baby was crying. Coastline had a tech at our door by 9:15pm and the system was running by 10:30. Unbelievable service.”
Jennifer M.
Newport Beach · August 2025
“Quoted me $4,200 less than a competitor for the same Trane system. The crew was professional, on time, and cleaned up better than my own house cleaner. 10/10.”
Mike T.
Costa Mesa · June 2025
“Have been on their maintenance plan for 6 years. They catch issues before they become emergencies and the price hasn't gone up once. Honest people doing honest work.”
Sarah K.
Irvine · April 2025
A same-day rescue, as it happens
92°
Sweltering
2:14 PM
Your AC gives out. 92° inside and climbing.
Get a free estimate
Tell us what's wrong. We'll email you back in seconds.
Day or night, weekend or holiday — submit this form and a real technician (not a call center) emails you back to schedule. AI-written in our voice, by name, referencing your service request.
- No call center. Your email goes straight to an OC technician.
- Free, no-obligation estimate. Same-day appointments most weekdays.
- Up-front pricing. You see the number before we lift a wrench.
We never sell or share your info. We'll only email about your service request — unsubscribe anytime.