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Mike Diamond Plumbing, HVAC & ElectricalHVAC contractor in Costa Mesa, CA

Mike Diamond Plumbing, HVAC & Electrical is an HVAC contractor at 2949 Randolph Av suite f, Costa Mesa, CA 92626, ranked #49 of 950 HVAC contractors in Costa Mesa and rated 4.4 from 98 Google reviews. Open 24 hours a day, 7 days a week.

Costa Mesa, CAUpdated 0 paid placements in any rankingHow we rank

Call (714) 706-1279Website ↗

Key facts

Key facts about Mike Diamond Plumbing, HVAC & Electrical
Address2949 Randolph Av suite f, Costa Mesa, CA 92626Get directions
Phone(714) 706-1279
Websitemikediamondservices.com
HoursOpen 24 hours, 7 days a week
Google rating4.4 from 98 Google reviews

Trades

Each trade shows the evidence we matched it on.

  • HVACmain tradeGoogle main category
  • Plumbingbusiness name
  • Electricalbusiness name

Service area

Serves Costa Mesa and 11 towns within 25 miles: Irvine, Fountain Valley, Newport Beach, Santa Ana, Tustin, Huntington Beach, Garden Grove, Midway City, Orange, North Tustin and Westminster.

Based in Costa Mesa, CAView on map

Opening hours

Opening hours for Mike Diamond Plumbing, HVAC & Electrical
DayHours
MondayOpen 24 hours
TuesdayOpen 24 hours
WednesdayOpen 24 hours
ThursdayOpen 24 hours
FridayOpen 24 hours
SaturdayOpen 24 hours
SundayOpen 24 hours
  • Open 24/7
  • Open evenings — no
  • Open Saturdays
  • Open Sundays
  • Emergency service

Typical heating and cooling prices

Typical heating and cooling prices
JobLowTypicalHigh
AC replacementPer system, installed (unit plus labor); typical range of customer-reported jobs. US national range$3,887$5,978$8,073
Furnace replacementPer system, installed; typical range of customer-reported jobs. US national range$2,823$4,814$6,896

Market ranges for the trade, checked October 2026, not a quote from this business. Ask for a written estimate.

Compare nearby HVAC contractors

Mike Diamond Plumbing, HVAC & Electrical compared with nearby businesses
BusinessRankCR ScoreGoogle ratingLicense verifiedSaturdaySundayDistance away
Mike Diamond Plumbing, HVAC & Electrical (this business)—604.4 (98)—YesYes
Finishline Air Conditioning & Heating#48605.0 (76)—YesYes6.7 mi
Positive Plumbing, Heating & AC Repair#50604.9 (131)—YesYes7.2 mi

See all 950 ranked HVAC contractors in Costa Mesa

Reviews

ContractorsRanked reviews

No ContractorsRanked reviews yet

Google

4.4from 98 Google reviews

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Questions about Mike Diamond Plumbing, HVAC & Electrical

How is Mike Diamond Plumbing, HVAC & Electrical ranked in Costa Mesa?

Mike Diamond Plumbing, HVAC & Electrical is ranked #49 of 950 HVAC contractors in Costa Mesa by CR Score, with 60 out of 100 as of October 2026. The score weighs reputation, credentials, review volume, recency, availability, trade focus, proximity, claimed profile, partnered and ContractorsRanked reviews. No business can pay to change its rank.

What are Mike Diamond Plumbing, HVAC & Electrical’s hours?

Mike Diamond Plumbing, HVAC & Electrical is open 24 hours a day, 7 days a week. Its listed hours are Open 24 hours, 7 days a week. On Saturdays it is open Open 24 hours, and on Sundays Open 24 hours. Hours come from the business listing; holiday hours may differ.

What areas does Mike Diamond Plumbing, HVAC & Electrical serve?

Serves Costa Mesa and 11 towns within 25 miles: Irvine, Fountain Valley, Newport Beach, Santa Ana, Tustin, Huntington Beach, Garden Grove, Midway City, Orange, North Tustin and Westminster. The list is based on the business's location and the usual service radius for heating and cooling. Confirm your address is covered when you call.

What do Google reviews say about Mike Diamond Plumbing, HVAC & Electrical?

Mike Diamond Plumbing, HVAC & Electrical has a rating of 4.4 from 98 Google reviews. The CR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.

How do I contact Mike Diamond Plumbing, HVAC & Electrical?

Call Mike Diamond Plumbing, HVAC & Electrical on (714) 706-1279. The business is at 2949 Randolph Av suite f, Costa Mesa, CA 92626. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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Claiming is free. Correct your hours, trades and service area. The CR Score is recalculated from corrected data; payment never changes it.

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