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Small business government contractors

Profiles of small businesses registered on SAM.gov to win federal contracts: CAGE code, UEI, registration status, SBA certifications and federal contract history. 34,768 of them have won federal contracts or SBIR/STTR awards in the last few years.

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Small businesses in California, with primary NAICS code 238220 (Plumbing, Heating, and Air-Conditioning Contractors), by federal contract dollars

Ranked by federal prime contract dollars as a small business since FY2024 (USAspending.gov, as of Nov 5, 2026). The 50 with the most dollars are shown; add a filter to narrow the list.

How these are ranked

Prime contract dollars since fiscal year 2024 on contracts where USAspending.gov counts the firm as a small business. “Small” is set per NAICS code: these firms are registered small under their primary code (or SBA-certified). Firms that hold small business subcontracting plans, which only businesses that aren't small file, or have $1 billion or more in these contracts are left out. A profile's yearly totals count all of its prime contracts, so they can be higher.

  1. Able Heating & Air Conditioning, IncChula Vista, CA · $27.4 million
  2. Paradigm Mechanical Corp.Santee, CA · $19.4 millionWOSB
  3. Reagent World, Inc.Irvine, CA · $15.8 millionWOSB
  4. Astro Mechanical Contractors IncEl Cajon, CA · $13.6 million
  5. SH Mechanical Inc.Suisun City, CA · $9.5 millionWOSB
  6. Public Works Contractor IncEl Cajon, CA · $8.5 million
  7. RK Industries Group, Inc.La Habra, CA · $5.7 million8(a)
  8. Total Solution LLCSanta Ana, CA · $5.1 million
  9. Valkyrie Mechanical JV LLCSuisun City, CA · $3.8 million8(a)WOSB
  10. Quality Refrigeration Company, Inc.San Diego, CA · $2 million
  11. Rhew Plumbing & Mechanical Inc.Temecula, CA · $1.5 millionSDVOSB
  12. Monaco Mechanical, Inc.Los Angeles, CA · $1.4 millionSDVOSB
  13. One Speed Ventures LLCLincoln, CA · $1.3 millionWOSBSDVOSB
  14. Applied Mechanical Solutions IncEscondido, CA · $1.2 million
  15. Daniel RosalesNorwalk, CA · $1.1 million
  16. Mission Aire CorporationBrea, CA · $943,418SDVOSB
  17. Silverbacq LLCBakersfield, CA · $939,373
  18. Centerline Plumbing & Mechanical, Inc.San Diego, CA · $802,285
  19. Advanced Filtration Concepts IncNorwalk, CA · $799,655
  20. BCP Mechanical, LLCFallbrook, CA · $617,585WOSBSDVOSB
  21. ZLM Mechanical, IncVista, CA · $581,7668(a)SDVOSB
  22. Granite Fire Protection IncOakhurst, CA · $499,422
  23. Community Fire ProtectionSeaside, CA · $453,087
  24. Prime GeniusSacramento, CA · $368,550
  25. Hug CorpWest Sacramento, CA · $349,181
  26. Comfort Air Mechanical Systems, Inc.Alameda, CA · $261,919WOSB
  27. Joe PhilmanChino Hills, CA · $197,956
  28. Penn Air Control Inc.Cypress, CA · $153,064SDVOSB
  29. Steven A PoirierRedding, CA · $143,600
  30. Byron GibbonsAlturas, CA · $142,128
  31. Seacliff Mechanical Services LLCHuntington Beach, CA · $130,574
  32. Chase Contracting IncSan Leandro, CA · $109,665WOSB
  33. Michael MorinMerced, CA · $98,921
  34. Bridgeview Enterprises IncRamona, CA · $96,135
  35. North HVAC Services IncPetaluma, CA · $88,570
  36. Commercial Air Services Inc.Gilroy, CA · $77,493
  37. Blueice Engineering LLCIrvine, CA · $74,448
  38. All-Star Plumbing Solutions, LLCRocklin, CA · $71,900SDVOSB
  39. Air West Mechanical Construction, Inc.Norwalk, CA · $69,878
  40. NVC Chiller IncValencia, CA · $63,500
  41. Top Tier Plumbing and Rooter LLCGrand Terrace, CA · $56,914
  42. Capital City Comfort, Inc.Sacramento, CA · $53,758
  43. Action Duct Cleaning Company, Inc,Altadena, CA · $53,188WOSB
  44. F. M. Thomas Air Conditioning, Inc.Brea, CA · $41,577WOSB
  45. Atlas Backflow IncSignal Hill, CA · $37,865
  46. EMT-HVAC LLCMurrieta, CA · $37,467
  47. A & B Mechanical, Inc.Livermore, CA · $36,900
  48. A Plus Heating and Air Inc.Citrus Heights, CA · $31,440
  49. Kenyon & Sons IncRancho Cordova, CA · $30,665
  50. Acme Air IncLancaster, CA · $30,629
Top firms by certification in California, with primary NAICS code 238220 (Plumbing, Heating, and Air-Conditioning Contractors) (8(a), HUBZone, WOSB and SDVOSB)

Top 8(a) firms in California, with primary NAICS code 238220 (Plumbing, Heating, and Air-Conditioning Contractors)

  1. RK Industries Group, Inc.La Habra, CA · $5.7 million
  2. Valkyrie Mechanical JV LLCSuisun City, CA · $3.8 million
  3. ZLM Mechanical, IncVista, CA · $581,766

Top HUBZone firms in California, with primary NAICS code 238220 (Plumbing, Heating, and Air-Conditioning Contractors)

  1. American Building Comfort Services, Inc.Oxnard, CA · $28,380

Top Women-owned small businesses in California, with primary NAICS code 238220 (Plumbing, Heating, and Air-Conditioning Contractors)

  1. Paradigm Mechanical Corp.Santee, CA · $19.4 million
  2. Reagent World, Inc.Irvine, CA · $15.8 million
  3. SH Mechanical Inc.Suisun City, CA · $9.5 million
  4. Valkyrie Mechanical JV LLCSuisun City, CA · $3.8 million
  5. One Speed Ventures LLCLincoln, CA · $1.3 million
  6. BCP Mechanical, LLCFallbrook, CA · $617,585
  7. Comfort Air Mechanical Systems, Inc.Alameda, CA · $261,919
  8. Chase Contracting IncSan Leandro, CA · $109,665
  9. Action Duct Cleaning Company, Inc,Altadena, CA · $53,188
  10. F. M. Thomas Air Conditioning, Inc.Brea, CA · $41,577

See more Women-owned small businesses in California, with primary NAICS code 238220 (Plumbing, Heating, and Air-Conditioning Contractors)

Top Service-disabled veteran-owned in California, with primary NAICS code 238220 (Plumbing, Heating, and Air-Conditioning Contractors)

  1. Rhew Plumbing & Mechanical Inc.Temecula, CA · $1.5 million
  2. Monaco Mechanical, Inc.Los Angeles, CA · $1.4 million
  3. One Speed Ventures LLCLincoln, CA · $1.3 million
  4. Mission Aire CorporationBrea, CA · $943,418
  5. BCP Mechanical, LLCFallbrook, CA · $617,585
  6. ZLM Mechanical, IncVista, CA · $581,766
  7. Penn Air Control Inc.Cypress, CA · $153,064
  8. All-Star Plumbing Solutions, LLCRocklin, CA · $71,900
  9. Frigus Mechanical LLCLos Angeles, CA · $15,995

Hiring small subcontractors?

If you're a prime looking for small businesses to team with, use the filters above to list small firms by state, NAICS code and certification, then open a profile for its SAM.gov registration, the codes it is small under and its contract history. Check any firm by name, UEI or CAGE code with the CAGE code and UEI lookup.

About these profiles

Every business registered on SAM.gov as small under at least one NAICS code, and every SBA-certified firm, has a profile; each profile says which codes it is small under. Registration details come from SAM.gov's public entity extract and contract figures from USAspending.gov. Contact names and street addresses are left out. Looking for partners to team with? See how to become a government subcontractor.

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