Who is the highest-scored commercial HVAC or plumbing contractor in Oakland, California?

By Registry Score, HSC Commercial (Oakland, CA) ranks first at 59 out of 100, among 6 scored businesses averaging 42.3. The score combines public reviews (50 points), digital presence (30) and reach (20); nobody can pay for a higher score.

Oakland, California · Commercial

Commercial HVAC & plumbing contractors in Oakland, CA

6 commercial HVAC & plumbing contractors in Oakland, out of 136 HVAC and plumbing businesses the Registry lists there. Ranked by Registry Score, owner-confirmed records first.

Pros: 6
Avg. score: 42.3
Scored: 6

Summary

Data last updated October 14, 2026

As of October 14, 2026, the ProComfort Registry lists 6 commercial HVAC & plumbing contractors in Oakland, California. Most-listed specialties: heating & furnaces (3), air conditioning (1). 6 have enough public signals for a Registry Score, averaging 42.3 out of 100; none scores 70 or higher. Together they hold 214 public reviews on Google, Yelp and Facebook. The highest-scored is HSC Commercial, at 59 out of 100. 2 are Featured for 2026. View HSC Commercial.

Counts come straight from the Registry's records. How the Registry Score works

Showing 1–6 of 6

Established

HSC Commercial

Featured

Oakland, CA 94601 4.4(194 reviews)

HVACHeatingCommercial

(800) 786-6847 Website

Established

Speagle Mechanical

Oakland, CA 94621 4.5(10 reviews)

HVACHeatingA/CCommercial

(510) 230-5222 Website

Established

Monarch Mechanical

Featured

Oakland, CA 94618 4.2(4 reviews)

HVACCommercial

(707) 374-4900 Website

Developing

Broadway Mechanical-Contractors Inc.

Oakland, CA 94621 4.2(4 reviews)

HVACCommercial

(510) 746-4000 Website

Developing

BV Mechanical Services LLC.

Oakland, CA 94606 4.2(2 reviews)

HVACHeatingCommercial

(510) 228-8601

Developing

H & M Mechanical Group

Oakland, CA 94621

HVACCommercial

(510) 569-2000 Website

Commercial HVAC & plumbing contractors in Oakland: at a glance

How many commercial HVAC & plumbing contractors are in Oakland, California?: As of October 14, 2026, the ProComfort Registry lists 6 commercial HVAC & plumbing contractors in Oakland, California.
Who is the highest-scored commercial HVAC or plumbing contractor in Oakland, California?: By Registry Score, HSC Commercial (Oakland, CA) ranks first at 59 out of 100, among 6 scored businesses averaging 42.3. The score combines public reviews (50 points), digital presence (30) and reach (20); nobody can pay for a higher score.
How are commercial HVAC & plumbing contractors in Oakland, 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: businesses whose public category or name points to commercial, industrial or mechanical contracting. Tags come from each business's public category and name, so a company can appear under several trades. Commercial HVAC & plumbing contractors across the US