Hsi Mechanical Inc
Licensed plumber, general contractor, HVAC contractor in Honolulu, Hawaii
Hsi Mechanical Inc holds Hawaii CLB licence CT-24578, active, licensed since 29 Aug 2003, rated 4.2 from 5 Google reviews. No complaints on the Hawaii CLB record.
Report card
- Licence activeHawaii CLB #CT-24578, class C-37. Issued 29 Aug 2003, expires 30 Sep 2028.
- Licensed 23 yrsSince 29 Aug 2003.
- Workers' comp insuredOn the Hawaii CLB record.
- Liability insuredWestfield Insurance Company, $1,000,000, valid to 1 Oct 2027.
- No complaintsNone on the Hawaii CLB record.Hawaii CLB record
- On the BBB, not accreditedIts BBB rating, complaints and reviews are on its Better Business Bureau profile.BBB profile Complaints Reviews
- 72 building permits since 2020Pulled under this licence (City and County of Honolulu), most recently 26 Feb 2025. The city's open data names contractors only up to 1 Jul 2025, so later permits are not counted.
Checked against the Hawaii Contractors License Board (DCCA PVL) register on 4 Nov 2026.
About Hsi Mechanical Inc
HSI Mechanical is a Honolulu contractor providing plumbing and HVAC services for commercial and government customers.
- Founded
- 1974
- Serves
- Honolulu
From Hsi Mechanical Inc's own website, read 5 Nov 2026. We only show what the site states.
Google reviews
4.2(5 reviews)Daniel Hollembaek★★★★★ 2 years agoView on Google
Great company and staff.
Keoks Manabe★★★★★ 8 years agoView on Google
Get all your sheetmetal needs here!!!
LANGONG FAHKAWZ!! (Kurs1)★★★★★ 8 years agoView on Google
Come here for sheetmetal fabrications a.c.
Jimney Kricket★★★★★ 5 years agoView on Google
Totally horrible employees didnt even cath my name before judging me. Then called the cops on me. Good thing i never needed their service.ill never need it now.
Read all 5 reviews on Google Reviews and photos from Google, 4 Nov 2026.
Recent permits
Building permits pulled under licence #CT-24578, from City and County of Honolulu open data. That data stopped naming contractors on 1 Jul 2025, so newer permits are not shown here. Locations are shown to ZIP code only.
- 26 Feb 2025 · Existing Multi-Family · ZIP 96815
- 11 Dec 2024 · University · ZIP 96822
- 11 Dec 2024 · School · ZIP 96744
- 11 Dec 2024 · rooftop Cooling Tower · ZIP 96814
- 28 Aug 2024 · SCHOOL · ZIP 96707
OSHA inspections
US Department of Labor enforcement data, matched by business name and city.
- 24 Aug 2022 · Planned3 violations · View on OSHA
- 5 Dec 2018 · Programmed related0 violations · View on OSHA
- 3 Mar 2017 · Planned1 violation, $1,785 penalty · View on OSHA
Why it ranks #5 of 71 plumbers in Honolulu
Score 83.7 / 100. Claiming this listing or using Theo never changes it. How we rank
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