Best Licensed HVAC Contractors in Herndon, VA
17 HVAC contractors registered in Herndon hold current DPOR licenses, verified against official records as of August 19, 2026. The 8 below are the top-ranked, ordered by years licensed.
- 17 current DPOR HVAC contractor licenses registered in Herndon
- Project-size tiers in Herndon: 8 Class A, 4 Class B, 5 Class C
- Median time licensed in Herndon: 16 years
- 4 of Herndon's licenses (23.5%) have been held 25 or more years
- 1 license comes from the state's legacy series, licensed since before 1992
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- Verified
- August 19, 2026
- Licensed since
- 1981
- Expires
- 2026-12-31
- Verified
- August 19, 2026
- Licensed since
- 1992
- Expires
- 2026-12-31
- Verified
- August 19, 2026
- Licensed since
- 1995
- Expires
- 2027-11-30
- Verified
- August 19, 2026
- Licensed since
- 2000
- Expires
- 2028-07-31
- Verified
- August 19, 2026
- Licensed since
- 2004
- Expires
- 2028-01-31
- Verified
- August 19, 2026
- Licensed since
- 2007
- Expires
- 2027-03-31
- Verified
- August 19, 2026
- Licensed since
- 2008
- Expires
- 2027-04-30
- Verified
- August 19, 2026
- Licensed since
- 2009
- Expires
- 2027-04-30
Compare the top 6 at a glance
| Company | License | Class | Licensed since |
|---|---|---|---|
| H & S Plumbing & Heating Inc. | #01-020533 | Class A | 1981 |
| Glen Terrence Young | #05-018591 | Class B | 1992 |
| Mendoza Heating & Air Conditioning Corp | #05-031578 | Class A | 1995 |
| Quang D Nguyen | #05-057576 | Class B | 2000 |
| New Millennium Technology Group Inc. | #05-081079 | Class A | 2004 |
| T And T Associates Inc. | #05-113815 | Class A | 2007 |
Herndon HVAC licensure at a glance
17 current DPOR HVAC contractor licenses are registered in Herndon. The letters on Virginia licences are the state's project-size tiers - 8 Class A, 4 Class B and 5 Class C here - shown as published and never ranked on: the dollar thresholds behind them are statute, not data in the extract, so we do not print them. Tenure is what these pages rank on, and Virginia's dates support it: the median Herndon license has been held 16 years, and 4 (23.5%) have been held 25 or more years. 1 Herndon license comes from the state's legacy series, closed to new entrants in February 1992: membership alone proves licensure since before 1992, so those records rank at that bound - which can only understate their tenure - and never at a year the state did not publish. DPOR's extract carries no insurance, no bond and no phone for any licensee, so Virginia listings show none of the three - a gap in the state's file, not a finding about any contractor. DPOR cannot link straight to a record, so every listing above shows its number for you to paste into DPOR's license lookup. How we verify.
HVAC Contractors in Herndon: common questions
How many licensed HVAC contractors are there in Herndon?
17 current DPOR HVAC contractor licenses are registered in Herndon. 17 Herndon-registered companies passed our license verification, and the 8 on this page are the top-ranked of those. DPOR publishes only current licenses, and we additionally require an expiration date still ahead of our data date.
What do Virginia's contractor license classes mean?
Class A, B and C are Virginia's project-size tiers - how large a project a firm may take on. Herndon's 17 licenses split 8 Class A, 4 Class B and 5 Class C. We show each listing's class as the state publishes it and never rank on it - the dollar thresholds are statute, not data in the extract.
How do I check an HVAC contractor's license in Virginia?
Every listing above shows its DPOR license number. DPOR cannot link straight to a record, so open its license lookup and type the number in. The median Herndon license has been held 16 years, and 4 (23.5%) have been held 25 or more years, including 1 license licensed since before 1992.