Licensed HVAC contractors in Seattle, WA

Q: How many licensed HVAC contractors are in Seattle?

36 HVAC contractors hold an active Washington State Department of Labor & Industries (L&I) licence with a mailing address in Seattle, checked on 4 November 2026. 19 of them have been licensed for 10 years or more.

Q: Does a HVAC contractor need a licence in Washington?

Yes, when the whole job, labour and materials, costs $500 or more, is part of a bigger project, or they advertise as a contractor (RCW 18.27.090). Electrical and plumbing contractors need an L&I licence for any job, whatever its size (RCW 19.28.041, RCW 18.106.020). Look for an active CCSM, EC6A, EC6B licence.

Q: How do I check a HVAC contractor's licence in Seattle?

Ask for the licence number and look it up on the Washington L&I website, or search this page. Every HVAC contractor listed here was matched to an active licence on the Washington L&I register.

Q: Which HVAC contractors rank highest in Seattle?

By our published formula (years licensed, complaint record, bond and insurance, and Google reviews), the top three are Bulger Safe & Lock Inc (91), Energy Technologies LLC (89), Acco Engineered Systems Inc (88). Paying or claiming a listing never changes the order.

Q: How much do HVAC contractors charge in Seattle?

HVAC contractors in the Seattle-Tacoma-Bellevue metro earn a median $38.51 an hour (BLS, May 2025); contractors typically bill about twice the wage to cover insurance, overhead and profit.

Q: Do I need a lead-safe certified HVAC contractor in Seattle?

If your home was built before 1978 and the work disturbs paint, yes: the law requires a firm certified lead-safe by the Washington State Department of Commerce. 50% of homes here were built before 1980 (US Census, ACS 2024 1-year), and 0 of the 36 licensed HVAC contractors listed are certified.

36 HVAC contractors hold an active licence on the Washington State Department of Labor & Industries (L&I) register in Seattle, checked 4 Nov 2026: 19 licensed 10 years or more, 97% bonded and 6 with a complaint or board disclosure on record. Ranked by a published formula; nobody pays to move up.

Active licences: 36
Median time licensed: 12.1 yrs
Bonded: 97%
Lead-Safe certified: 0
Google reviews: 2,104

Filled tags sit at the business's Google location; hollow tags show its mailing ZIP code only. Each tag is the theoPros score.

1
Bulger Safe & Lock Inc
Seattle, WA · Washington L&I EC06, EC6A #BULGESL171NQ · licensed 43 yrs
- Licence active
- Bonded $4,000
- No complaints
914.5(263)Full report
2
Energy Technologies LLC
Seattle, WA · Washington L&I EC01 #ENERGTL821NG · licensed 17 yrs
- Licence active
- Bonded $4,000
- No complaints
894.7(53)Full report
3
Acco Engineered Systems Inc
Seattle, WA · Washington L&I EC6A #ACCOESI971KW · licensed 23 yrs
- Licence active
- Bonded $4,000
- No complaints
884.5(16)Full report
4
Olson Energy Serv/Gas Appl Svc
Seattle, WA · Washington L&I CCSM #OLSONES863OD · licensed 12 yrs
- Licence active
- Bonded $15,000
- No complaints
844.8(377)Full report
5
Hines Interests LP
Seattle, WA · Washington L&I EC07, EC6A #HINESIL981UQ · licensed 25 yrs
- Licence active
- Bonded $4,000
- No complaints
792.0(1)Full report
6
Coffman Engineers Inc
Seattle, WA · Washington L&I CCSM #COFFMEI866O9 · licensed 12 yrs
- Licence active
- Bonded $15,000
- No complaints
724.2(5)Full report
7
Evergreen Refrigeration LLC
Seattle, WA · Washington L&I EC02 #EVERGRL812DK · licensed 21 yrs
- Licence active
- Bonded $4,000
- 3 complaints on record
3 infractions, citations or debarments on the Washington L&I record
714.8(1,013)Full report
8
United Systems Mechanical LLC
Seattle, WA · Washington L&I EC6A #UNITESM813QO · licensed 22 yrs
- Licence active
- Bonded $4,000
- 1 complaint on record
1 infraction, citation or debarment on the Washington L&I record
705.0(2)Full report
9
Cloud 9 Heating & Air LLC
Seattle, WA · Washington L&I CCSM #CLOUD9H773CA · licensed 4 yrs
- Licence active
- Bonded $15,000
- No complaints
704.9(33)Full report
10
Sound Oil Co
Seattle, WA · Washington L&I EC6A #SOUNDOC016PH · licensed 42 yrs
- Licence active
- Bonded $4,000
- 1 complaint on record
1 infraction, citation or debarment on the Washington L&I record
694.1(109)Full report
11
Psr Mechanical LLC
Seattle, WA · Washington L&I EC6A, EC07 #PSRMEML804DS · licensed 7 yrs
- Licence active
- Bonded $4,000
- No complaints
674.4(17)Full report
12
Genesee Fuel & Heating Co, Inc
Seattle, WA · Washington L&I EC6A #GENESI*001L6 · licensed 63 yrs
- Licence active
- Bonded $4,000
- No complaints
65No Google reviews yetFull report
13
Williamson Landscape Arch LLC
Seattle, WA · Washington L&I EC06, EC6A #WILLILA996RU · licensed 31 yrs
- Licence active
- Bonded $4,000
- No complaints
65No Google reviews yetFull report
14
Neudorfer Engineers LLC
Seattle, WA · Washington L&I CCSM #NEUDOEL787LN · licensed 4 yrs
- Licence active
- Bonded $15,000
- No complaints
655.0(5)Full report
15
Progressive Comfort Solutions
Seattle, WA · Washington L&I CCSM #PROGRCS863J1 · licensed 13 yrs
- Licence active
- Bonded $15,000
- 4 complaints on record
4 infractions, citations or debarments on the Washington L&I record
614.9(167)Full report
16
Uni Refrigeration
Seattle, WA · Washington L&I CCSM #UNIRER*919PA · licensed 17 yrs
- Licence active
- Bonded $15,000
- No complaints
61No Google reviews yetFull report
17
Air Commodities Inc
Seattle, WA · Washington L&I EC6A #AIRCOCI748BL · licensed <1 yr
- Licence active
- Bonded $4,000
- No complaints
604.6(17)Full report
18
Comfort Tech Heating & A/C Inc
Seattle, WA · Washington L&I CCSM #COMFOTH898CM · licensed 16 yrs
- Licence active
- Bonded $15,000
- No complaints
59No Google reviews yetFull report
19
Vent Services
Seattle, WA · Washington L&I CCSM #VENTSS*756RT · licensed <1 yr
- Licence active
- Bonded $15,000
- No complaints
585.0(3)Full report
20
Entero System Services Inc
Seattle, WA · Washington L&I CCSM #ENTERSS892MH · licensed 15 yrs
- Licence active
- Bonded $15,000
- No complaints
57No Google reviews yetFull report
21
Energy Efficient System LLC
Seattle, WA · Washington L&I CCSM #ENERGES843Q9 · licensed 10 yrs
- Licence active
- Bonded $15,000
- No complaints
50No Google reviews yetFull report
22
Ambient Air Heating LLC
Seattle, WA · Washington L&I CCSM #AMBIEAH822BD · licensed 9 yrs
- Licence active
- Bonded $15,000
- No complaints
48No Google reviews yetFull report
23
Ace HVAC Service LLC
Seattle, WA · Washington L&I CCSM #ACEHVHS797OT · licensed 5 yrs
- Licence active
- Bonded $15,000
- No complaints
43No Google reviews yetFull report
24
Refrigeration Doctor
Seattle, WA · Washington L&I CCSM #REFRID*782OA · licensed 4 yrs
- Licence active
- Bonded $15,000
- No complaints
41No Google reviews yetFull report
25
Guardian Security Systems Inc
Seattle, WA · Washington L&I EC06, EC6A #GUARDSS233K5 · licensed 49 yrs
- Licence active
- Bonded $4,000
- 18 complaints on record
18 infractions, citations or debarments on the Washington L&I record
40No Google reviews yetFull report
26
Method Energy LLC
Seattle, WA · Washington L&I EC01 #METHOEL778QB · licensed 3 yrs
- Licence active
- Bonded $4,000
- No complaints
40No Google reviews yetFull report
27
Sno Valley Process Solutions
Seattle, WA · Washington L&I EC6A #SNOVAVP751BM · licensed 2 yrs
- Licence active
- Bonded $4,000
- No complaints
38No Google reviews yetFull report
28
Black Lotus HVAC LLC
Seattle, WA · Washington L&I EC01 #BLACKLH759KZ · licensed 2 yrs
- Licence active
- Bonded $4,000
- No complaints
38No Google reviews yetFull report
29
Luna Home Comfort LLC
Seattle, WA · Washington L&I CCSM #LUNAHHC754QQ · licensed <1 yr
- Licence active
- Bonded $15,000
- No complaints
36No Google reviews yetFull report
30
One Hour Htg & A/C of Ctrl Sea
Seattle, WA · Washington L&I EC6A #ONEHOHH741CL · licensed <1 yr
- Licence active
- Bonded $4,000
- No complaints
36No Google reviews yetFull report
31
Elite HVAC & Refrigeration LLC
Seattle, WA · Washington L&I CCSM #ELITEHR741K2 · licensed <1 yr
- Licence active
- Bonded $15,000
- No complaints
36No Google reviews yetFull report
32
Mini Split Pros
Seattle, WA · Washington L&I CCSM #MINISSP744L4 · licensed <1 yr
- Licence active
- Bonded $15,000
- No complaints
36No Google reviews yetFull report
33
Go Green Heating AC & Elec LLC
Seattle, WA · Washington L&I EC01 #GOGREGH755KM · licensed 2 yrs
- Licence active
- Bonded $4,000
- 4 complaints on record
3 infractions, citations or debarments on the Washington L&I record
1 open lawsuit against the bond on the Washington L&I record
12No Google reviews yetFull report
34
Commercial Filter Sales & Svc
Seattle, WA · Washington L&I CCSM #COMMEFS935B5 · licensed 20 yrs
- Licence active
- Bonded $15,000
- No complaints
905.0(8)Full report
35
Great Sun Corp
Seattle, WA · Washington L&I CCSM #GREATSC951D1 · licensed 22 yrs
- Licence active
- Bonded $15,000
- No complaints
874.4(14)Full report
36
Cello Technologies
Seattle, WA · Washington L&I EC06, EC6A #CELLOT*005NW · licensed 26 yrs
- Licence active
- No bond on record
- No complaints
745.0(1)Full report

Seattle at a glance

Active heating and air conditioning licences with a mailing address here: 36.
Median time licensed: 12.1 years. Licensed in the last two years: 9 of 36.
Contractor's bond on the Washington L&I record: 35 of 36.
Washington Commerce Lead-Safe certified, which the law requires for work that disturbs paint in homes built before 1978: 0 of 36.
Open complaint or disciplinary action on the Washington L&I record: 6 of 36.
Heating and air conditioning licences here that are no longer active: 16 expired, 7 suspended, 4 out of business, 3 re-licensed.
Named as the contractor on a city building permit since 2020: 12 of 36.
Median pay for HVAC contractors in the Seattle-Tacoma-Bellevue metro is $38.51 an hour (BLS, May 2025).

Homes here

50%

of 411,671 homes were built before 1980 (median year built 1981). Paint in homes built before 1978 may contain lead, and work that disturbs it must be done by a Lead-Safe (RRP) certified firm; 0 of the 36 HVAC contractors here are.

Median home value $950,800 · 42% owner-occupied. Seattle, Census ACS 2024 1-year.

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Questions people ask about HVAC contractors in Seattle

How many licensed HVAC contractors are in Seattle?

36 HVAC contractors hold an active Washington State Department of Labor & Industries (L&I) licence with a mailing address in Seattle, checked on 4 November 2026. 19 of them have been licensed for 10 years or more.

Does a HVAC contractor need a licence in Washington?

Yes, when the whole job, labour and materials, costs $500 or more, is part of a bigger project, or they advertise as a contractor (RCW 18.27.090). Electrical and plumbing contractors need an L&I licence for any job, whatever its size (RCW 19.28.041, RCW 18.106.020). Look for an active CCSM, EC6A, EC6B licence.

How do I check a HVAC contractor's licence in Seattle?

Ask for the licence number and look it up on the Washington L&I website, or search this page. Every HVAC contractor listed here was matched to an active licence on the Washington L&I register.

Which HVAC contractors rank highest in Seattle?

By our published formula (years licensed, complaint record, bond and insurance, and Google reviews), the top three are Bulger Safe & Lock Inc (91), Energy Technologies LLC (89), Acco Engineered Systems Inc (88). Paying or claiming a listing never changes the order.

How much do HVAC contractors charge in Seattle?

HVAC contractors in the Seattle-Tacoma-Bellevue metro earn a median $38.51 an hour (BLS, May 2025); contractors typically bill about twice the wage to cover insurance, overhead and profit.

Do I need a lead-safe certified HVAC contractor in Seattle?

If your home was built before 1978 and the work disturbs paint, yes: the law requires a firm certified lead-safe by the Washington State Department of Commerce. 50% of homes here were built before 1980 (US Census, ACS 2024 1-year), and 0 of the 36 licensed HVAC contractors listed are certified.

Licensed HVAC contractors in Seattle, WA

Ranked list

Questions people ask about HVAC contractors in Seattle