Best HVAC companies in Lake Forest, CA

The highest-scoring HVAC company in and near Lake Forest is Dial One Sonshine Heating, Air & Plumbing (score 90, 4.9 stars from 3,009 Google reviews). 50 companies meet the 5 Star standard within about 16 miles; the top 30 are ranked below.

Last updated Nov 1, 2026How we rank
  1. 1

    Dial One Sonshine Heating, Air & Plumbing

    4.9 · 3,009 Google reviewsSanta Ana, CA45 years in business

    Dial One Sonshine Heating, Air & Plumbing provides HVAC, plumbing, and indoor air quality services for Orange County homeowners. The company has served the area since 1981. Its technicians handle air conditioning and…

    Financing availableEmergency service
    90SCORE
  2. 2

    Biard & Crockett Plumbing, Heating, and Air Conditioning

    4.9 · 2,054 Google reviewsOrange, CA66 years in business

    Biard & Crockett Plumbing, Heating, and Air Conditioning has served Orange County communities since 1960. The company began as a plumbing business established by John Biard and Dave Crockett and later expanded into he…

    89SCORE
  3. 3

    JustinTime Plumbing Heating and Air

    4.9 · 1,590 Google reviewsCosta Mesa, CA22 years in business

    JustinTime Plumbing Heating and Air serves residential, commercial, and industrial clients in Costa Mesa and throughout Orange County. The company has provided plumbing, heating, and air services since 2004 and states…

    Financing availableEmergency service
    88SCORE
  4. 4

    Moffett Plumbing & Air

    4.9 · 1,445 Google reviewsOrange, CA57 years in business

    Moffett Plumbing & Air is a family-owned and operated plumbing and HVAC company serving Orange County, California, since 1969. Its plumbing work includes installation and repair, drain cleaning, leak detection, sewer…

    Financing availableEmergency service
    88SCORE
  5. 5

    Air Care Heating and Air Conditioning

    5.0 · 1,633 Google reviewsRancho Santa Margarita, CA
    InsuredFree estimatesEmergency service
    85SCORE
  6. 6

    1st Choice Heating & Air Conditioning, Inc.

    5.0 · 1,074 Google reviewsMission Viejo, CA

    1st Choice Heating & Air Conditioning, Inc. provides residential heating and cooling services in Mission Viejo and surrounding Orange County. The company repairs, installs, replaces, and maintains furnaces, and it wor…

    Emergency service
    84SCORE
  7. 7

    Mission Viejo Heating & Air

    5.0 · 1,025 Google reviewsLake Forest, CA

    Mission Viejo Heating & Air is a full-service HVAC company serving homes and businesses in Lake Forest, Mission Viejo, and the greater Orange County area. The local, family-owned and operated company handles air condi…

    Financing available
    84SCORE
  8. 8

    Apex heating and air conditioning

    5.0 · 437 Google reviewsLaguna Hills, CA

    Apex Heating and Air Conditioning is a locally owned, family-operated HVAC company serving Orange County. The company repairs, installs, and maintains heating and air conditioning equipment, including furnaces and AC…

    81SCORE
  9. 9

    Saddleback Plumbing Heating & Air

    4.8 · 768 Google reviewsLake Forest, CA45 years in business
    Emergency serviceFinancing available
    80SCORE
  10. 10

    Irvine Air Conditioning & Refrigeration

    5.0 · 326 Google reviewsIrvine, CA
    80SCORE
  11. 11

    Orange Coast Plumbing

    4.9 · 1,280 Google reviewsSanta Ana, CA
    79SCORE
  12. 12

    One Season Heating and Air Conditioning

    5.0 · 301 Google reviewsIrvine, CA
    79SCORE
  13. 13

    One Hour Heating & Air Conditioning

    5.0 · 250 Google reviewsOrange, CA
    79SCORE
  14. 14

    Coast Plumbing, Heating & Air, Inc.

    4.9 · 669 Google reviewsFountain Valley, CA
    78SCORE
  15. 15

    Air Blue HVAC

    5.0 · 387 Google reviewsSanta Ana, CA
    78SCORE
  16. 16

    South County Air Services

    5.0 · 260 Google reviewsTustin, CA
    78SCORE
  17. 17

    Lewis Air Services

    4.9 · 891 Google reviewsRancho Santa Margarita, CA
    76SCORE
  18. 18

    Coastal Heating and Cooling

    4.9 · 415 Google reviewsMission Viejo, CA
    76SCORE
  19. 19

    Klondike Air Conditioning & Heating

    4.9 · 393 Google reviewsCosta Mesa, CA
    76SCORE
  20. 20

    True Home Heating & Air Conditioning

    4.8 · 968 Google reviewsLaguna Hills, CA
    75SCORE
  21. 21

    MAYDAY Heating and Air Conditioning Irvine

    4.9 · 348 Google reviewsIrvine, CA
    75SCORE
  22. 22

    John Stevenson Plumbing, Heating & Air Conditioning

    4.8 · 812 Google reviewsLake Forest, CA
    74SCORE
  23. 23

    Comfort Air

    4.9 · 157 Google reviewsLake Forest, CA
    73SCORE
  24. 24

    Airotech

    5.0 · 98 Google reviewsIrvine, CA
    73SCORE
  25. 25

    Service Lion Plumbing Heating Air Electric

    4.7 · 1,439 Google reviewsOrange, CA
    72SCORE
  26. 26

    Just Right Services Plumbing, Heating and Air Conditioning

    4.9 · 1,057 Google reviewsLaguna Hills, CA
    72SCORE
  27. 27

    Real Time Bros

    4.8 · 410 Google reviewsTustin, CA
    72SCORE
  28. 28

    Universal Plumbing, Heating, and Air

    4.8 · 323 Google reviewsTustin, CA
    72SCORE
  29. 29

    Positive Plumbing, Heating & AC Repair

    4.9 · 167 Google reviewsIrvine, CA
    71SCORE
  30. 30

    Most Valuable Plumber

    4.9 · 242 Google reviewsOrange, CA
    70SCORE

Compare the top 10

Top HVAC companies in Lake Forest by 5 Star Score
#CompanyScoreGoogle ratingReviewsYearsBased in
1Dial One Sonshine Heating, Air & Plumbing904.93,00945Santa Ana
2Biard & Crockett Plumbing, Heating, and Air Conditioning894.92,05466Orange
3JustinTime Plumbing Heating and Air884.91,59022Costa Mesa
4Moffett Plumbing & Air884.91,44557Orange
5Air Care Heating and Air Conditioning855.01,633–Rancho Santa Margarita
61st Choice Heating & Air Conditioning, Inc.845.01,074–Mission Viejo
7Mission Viejo Heating & Air845.01,025–Lake Forest
8Apex heating and air conditioning815.0437–Laguna Hills
9Saddleback Plumbing Heating & Air804.876845Lake Forest
10Irvine Air Conditioning & Refrigeration805.0326–Irvine

HVAC companies in Lake Forest: quick answers

Who is the highest-rated HVAC company in Lake Forest, CA?

Dial One Sonshine Heating, Air & Plumbing has the highest 5 Star Score among HVAC companies in and near Lake Forest: 90 out of 100, with a 4.9 star Google rating from 3,009 reviews.

How many 5 Star HVAC companies serve Lake Forest?

50 HVAC companies meet our standard within about 16 miles of Lake Forest: at least a 4.5 star rating, 20 or more reviews and a score of 60 or higher. The top 30 have 24,228 Google reviews between them, averaging 4.91 stars.

How are these HVAC companies ranked?

By 5 Star Score: rating quality adjusted for review count (45 points), review volume (25), review recency (15), years in business (10) and license verification (5). Businesses cannot pay to change their score.

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Ratings and review counts come from each company's public Google listing and are re-checked monthly. 5 Star Home Service Pros is independent; companies cannot pay for placement.