The Best Gas Contractors in San Francisco, CA

Find the right company for your job

Pick the job — we re-rank companies by how customers rated that exact job.

1Cabrillo Plumbing, Heating & Air★ 5.00 on this job34 jobs reviewedusually $300–400iHow Job match is calculatedBuilt only from reviews Google tagged “Water heater repair”:Stars on this job 55%5.00★Number of such jobs 25%34Overall Experts Score 20%92Job match= 95Stars are pulled toward the category average (4.85★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.95

2Heise's Plumbing★ 5.00 on this job33 jobs reviewedusually $1,000+iHow Job match is calculatedBuilt only from reviews Google tagged “Water heater repair”:Stars on this job 55%5.00★Number of such jobs 25%33Overall Experts Score 20%83Job match= 92Stars are pulled toward the category average (4.85★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.92

3Magic Plumbing Heating & Cooling★ 4.98 on this job44 jobs reviewedusually $1,000+iHow Job match is calculatedBuilt only from reviews Google tagged “Water heater repair”:Stars on this job 55%4.98★Number of such jobs 25%44Overall Experts Score 20%71Job match= 91Stars are pulled toward the category average (4.85★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.91

4George Salet Plumbing, Inc.★ 5.00 on this job10 jobs reviewedusually $1,000+iHow Job match is calculatedBuilt only from reviews Google tagged “Water heater repair”:Stars on this job 55%5.00★Number of such jobs 25%10Overall Experts Score 20%94Job match= 84Stars are pulled toward the category average (4.85★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.84

5Fast Response Plumbing & Rooter★ 4.92 on this job13 jobs reviewedusually $200–300iHow Job match is calculatedBuilt only from reviews Google tagged “Water heater repair”:Stars on this job 55%4.92★Number of such jobs 25%13Overall Experts Score 20%94Job match= 83Stars are pulled toward the category average (4.85★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.83

6Advanced Plumbing & Drain★ 5.00 on this job7 jobs reviewedusually $100–200iHow Job match is calculatedBuilt only from reviews Google tagged “Water heater repair”:Stars on this job 55%5.00★Number of such jobs 25%7Overall Experts Score 20%92Job match= 81Stars are pulled toward the category average (4.85★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.81

71 Backflow Plumbing★ 5.00 on this job5 jobs reviewedusually $600–700iHow Job match is calculatedBuilt only from reviews Google tagged “Water heater repair”:Stars on this job 55%5.00★Number of such jobs 25%5Overall Experts Score 20%94Job match= 78Stars are pulled toward the category average (4.85★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.78

8Ace Plumbing & Rooter, Inc.★ 4.76 on this job33 jobs reviewedusually $1–100iHow Job match is calculatedBuilt only from reviews Google tagged “Water heater repair”:Stars on this job 55%4.76★Number of such jobs 25%33Overall Experts Score 20%83Job match= 77Stars are pulled toward the category average (4.85★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.77

Job match = this company’s ★ on reviews Google tagged “Water heater repair” (shrunk toward the category average when there are few), how many such jobs it has done, and its overall Experts Score.

What customers said about water heater repair

TessLocal Guide · 17 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · a week ago★★★★★

Heise's Plumbing

Cesar and Marlon were very impressive. They were on time and honest. They were also very patient with me as they were explaining the remedy to my water heater problem. I highly recommend them, and won't hesitate to use them again in the future.

Water heater repair

vinaLocal Guide · 29 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · a month ago★★★★★

Ace Plumbing & Rooter, Inc.

Amazing communications, service and easy to pay! Will use them again in the future.

Paid $200–400Great priceWater heater repair

Barry8 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · Edited a month ago★★★★★

Fast Response Plumbing & Rooter

I’ve been using your service for years. You’re simply the best. It comes down from the top. Joe is an amazing man, and everybody who works for him knows it. The integrity, respect and attention to detail are ingrained in your service. I wish Fortune 500 companies would study you. Sincerely, Barry San Francisco

Paid $1–200Great priceWater heater repair

PPaula6 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · Edited a month ago★★★★★

George Salet Plumbing, Inc.

Another service request and again outstanding service. Prompt, extremely professional and service oriented. Thank you George Salet!!!!

Paid $2,000+Reasonable priceWater heater installationWater heater repair

BBarbaraLocal Guide · 17 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · Edited 5 months ago★★★★★

Cabrillo Plumbing, Heating & Air

5/11/26 Matt has come for the last 2 years for my annual maintenance for my furnace and water heater. He is knowledgeable and friendly and does great work. I also asked him to fix my toilet when he was here. Cabrillo is not the least expensive plumbers but they are the best and worth the price. 6/20 Frank just… Read full review

Paid $300–400Reasonable priceHeating system installationWater heater repair+ Responsiveness+ Punctuality+ Quality

Max2 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 5 months ago★★★★★

Magic Plumbing Heating & Cooling

The Tech was amazing, calm, collected, and good at his job, explained everything clearly and did what he said he would. Would work with him again and again. He was very positive and took his time to get things right. The price of things is a lot but that seems true with the world we live in.

Paid $1,000+OverpricedDrain cleaningWater heater repairPlumbing leak repair

Overall ratings

Experts Score 0–100iExperts Score (0–100)Absolute quality first: recency-weighted star average (≈54%), share of 1–2★ reviews (≈24%), customers’ price verdicts (≈14%), owner replies to critical reviews (≈7%); minus up to 10 points each for complaints flagged in Google review highlights and for a real slide in recent ratings. Hover a company’s score on its page for the full breakdown. and a letter grade per factor (A = top 20% of gas contractors).

#	Company	ScoreiExperts Score (0–100)Absolute quality first: recency-weighted star average (≈54%), share of 1–2★ reviews (≈24%), customers’ price verdicts (≈14%), owner replies to critical reviews (≈7%); minus up to 10 points each for complaints flagged in Google review highlights and for a real slide in recent ratings. Hover a company’s score on its page for the full breakdown.	FactorsiFactor grades, in orderSatisfaction (54%): Recency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.Reliability (24%): How rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.Craft & service (0%): Google review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.Value (14%): Customers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.Momentum (0%): Penalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.Replies to reviews (7%): How often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.One letter per factor score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = below 20.	★iGoogle star rating as shown on Google Maps.	Typical billiMedian bill customers of this company reported in their reviews (needs 3+ priced reviews).
1	Fast Response Plumbing & RooterSan Francisco, CA	A 94iHow the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%94+51.3Reliability 24%93+22.5Value 14%100+14.1Replies to reviews 7%87+6.2Craft & service penalty94−0.6Experts Score= 94Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.	AAAAAA	4.94	$264
2	1 Backflow PlumbingSan Francisco, CA	A 94iHow the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 59%96+56.3Reliability 26%91+23.7Value 15%93+14.2Craft & service penalty99−0.1Experts Score= 94Not enough data for replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.	AAAAA–	4.97	$161
3	George Salet Plumbing, Inc.San Francisco, CA	A 94iHow the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%94+51.3Reliability 24%95+23Value 14%94+13.3Replies to reviews 7%86+6.1Experts Score= 94Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.	AAAAAA	4.95	$881
4	Advanced Plumbing & DrainSan Francisco, CA	A 92iHow the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%93+50.7Reliability 24%91+22.1Value 14%100+14.1Replies to reviews 7%71+5Craft & service penalty97−0.3Experts Score= 92Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.	AAAAAB	4.94	$305
5	Cabrillo Plumbing, Heating & AirSan Francisco, CA	A 92iHow the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%92+50.2Reliability 24%92+22.3Value 14%100+14.1Replies to reviews 7%89+6.3Craft & service penalty94−0.6Experts Score= 92Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.	AAAAAA	4.92	$748
6	Heise's PlumbingSan Francisco, CA	A 83iHow the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%88+48Reliability 24%87+21.1Value 14%72+10.2Replies to reviews 7%61+4.3Craft & service penalty98−0.2Experts Score= 83Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.	AAABAB	4.88	$406
7	Ace Plumbing & Rooter, Inc.San Francisco, CA	A 83iHow the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%86+46.9Reliability 24%84+20.4Value 14%90+12.7Replies to reviews 7%41+2.9Experts Score= 83Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.	AAAAAC	4.89	$529
8	Magic Plumbing Heating & CoolingSan Francisco, CA	B 71iHow the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%81+44.2Reliability 24%65+15.8Value 14%100+14.1Replies to reviews 7%34+2.4Craft & service penalty95−0.5Momentum penalty49−5.1Experts Score= 71Grade B: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.	ABAACD	4.86	$767

What jobs cost

What customers paid, from the price Google asks reviewers to report.

Gas Contractors in San Francisco, CA at a glance

How the 8 gas contractors we rated in San Francisco, CA compare, and what customers praise most.

How we grade

Satisfaction (54%) — Recency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.

Reliability (24%) — How rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.

Craft & service (penalty, up to −10) — Google review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.

Value (14%) — Customers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.

Momentum (penalty, up to −10) — Penalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.

Replies to reviews (7%) — How often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.