66
EstablishedCastro Valley, California · HVAC
HVAC contractors in Castro Valley, CA
4 HVAC contractors in Castro Valley, out of 5 HVAC and plumbing businesses the Registry lists there. Ranked by Registry Score, owner-confirmed records first.
- Pros
- 4
- Avg. score
- 56.5
- Scored
- 4
Summary
Data last updatedAs of October 14, 2026, the ProComfort Registry lists 4 HVAC contractors in Castro Valley, California. Most-listed specialties: heating & furnaces (2), air conditioning (2), ductwork & IAQ (1). 4 have enough public signals for a Registry Score, averaging 56.5 out of 100; none scores 70 or higher. Together they hold 214 public reviews on Google, Yelp and Facebook. The highest-scored is DMG North, at 66 out of 100. 3 are Featured for 2026. View DMG North.
Counts come straight from the Registry's records. How the Registry Score works
Featured HVAC contractors in Castro Valley
65
EstablishedCastro Valley, CA 94546 4.3(103 reviews)
HVACHeatingA/C
64
EstablishedShowing 1–4 of 4
66
Established65
EstablishedCastro Valley, CA 94546 4.3(103 reviews)
HVACHeatingA/C
64
EstablishedCastro Valley, CA 94546 4.8(100 reviews)
HVACDucts
31
DevelopingCastro Valley, CA 94546 4.0(8 reviews)
HVACPlumbingHeating
HVAC contractors in Castro Valley: at a glance
- How many HVAC contractors are in Castro Valley, California?
- As of October 14, 2026, the ProComfort Registry lists 4 HVAC contractors in Castro Valley, California.
- Who is the highest-scored HVAC contractor in Castro Valley, California?
- By Registry Score, DMG North (Castro Valley, CA) ranks first at 66 out of 100, among 4 scored businesses averaging 56.5. The score combines public reviews (50 points), digital presence (30) and reach (20); nobody can pay for a higher score.
- Which companies are featured in Castro Valley, California for 2026?
- ProComfort Registry features DMG North, 4 Seasons Heating & Air Conditioning, Advanced Air Solutions. Featured companies are selected editorially from public reviews and track record; listings and rankings are never sold.
- How are HVAC contractors in Castro Valley, California ranked?
- By Registry Score (0-100, from public reviews, digital presence and reach), with records confirmed by their owners listed first. The full method is at https://procomfortregistry.online/methodology.
What this list includes: heating, ventilation and air conditioning businesses (furnaces, heat pumps, A/C, climate control). Tags come from each business's public category and name, so a company can appear under several trades. HVAC contractors across the US