The Best Gas Contractors in San Francisco, CA

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1Cabrillo Plumbing, Heating & Air★ 5.00 on this job57 jobs reviewedusually $1,000+iHow Job match is calculatedBuilt only from reviews Google tagged “Water heater installation”:Stars on this job 55%5.00★Number of such jobs 25%57Overall Experts Score 20%92Job match= 94Stars 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.94

2Fast Response Plumbing & Rooter★ 5.00 on this job44 jobs reviewedusually $200–300iHow Job match is calculatedBuilt only from reviews Google tagged “Water heater installation”:Stars on this job 55%5.00★Number of such jobs 25%44Overall Experts Score 20%94Job match= 93Stars 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.93

3Heise's Plumbing★ 4.91 on this job90 jobs reviewedusually $1,000+iHow Job match is calculatedBuilt only from reviews Google tagged “Water heater installation”:Stars on this job 55%4.91★Number of such jobs 25%90Overall Experts Score 20%83Job match= 89Stars 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.89

4Advanced Plumbing & Drain★ 4.94 on this job33 jobs reviewedusually $1,000+iHow Job match is calculatedBuilt only from reviews Google tagged “Water heater installation”:Stars on this job 55%4.94★Number of such jobs 25%33Overall Experts Score 20%92Job match= 87Stars 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.87

5George Salet Plumbing, Inc.★ 4.96 on this job23 jobs reviewedusually $1,000+iHow Job match is calculatedBuilt only from reviews Google tagged “Water heater installation”:Stars on this job 55%4.96★Number of such jobs 25%23Overall Experts Score 20%94Job match= 86Stars 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.86

6Ace Plumbing & Rooter, Inc.★ 4.88 on this job59 jobs reviewedusually $1,000+iHow Job match is calculatedBuilt only from reviews Google tagged “Water heater installation”:Stars on this job 55%4.88★Number of such jobs 25%59Overall Experts Score 20%83Job match= 85Stars 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.85

7Magic Plumbing Heating & Cooling★ 4.88 on this job84 jobs reviewedusually $2,000+iHow Job match is calculatedBuilt only from reviews Google tagged “Water heater installation”:Stars on this job 55%4.88★Number of such jobs 25%84Overall Experts Score 20%71Job 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

81 Backflow Plumbing★ 5.00 on this job4 jobs reviewedusually $600–700iHow Job match is calculatedBuilt only from reviews Google tagged “Water heater installation”:Stars on this job 55%5.00★Number of such jobs 25%4Overall Experts Score 20%94Job match= 75Stars 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.75

Job match = this company’s ★ on reviews Google tagged “Water heater installation” (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 installation

Valerie3 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. · 11 hours ago★★★★★

Fast Response Plumbing & Rooter

Exceptional work with recent installation of a new water heater! Fast, professional, courteous. Fast Response Plumbing & Rooter is our 'go-to' for all plumbing needs. Thank you! Oleg, Val.

Reasonable priceWater heater installation

Lisa7 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. · 3 days ago★★★★

Ace Plumbing & Rooter, Inc.

Responsive and efficient, the service we received met our needs with the care and urgency we required. Will definitely use again when necessary.

Paid $2,000+Reasonable priceWater heater installation

GeorgeLocal Guide · 15 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. · 4 days ago★★★★★

Heise's Plumbing

I recently used them a couple months ago, and today one of my tenants water heater stopped working. I called Heise's plumbing this morning, and they came and replaced it this afternoon. I highly recommend them for all your plumbing needs. They stand by their work

Reasonable priceWater heater installation

franckernsLocal Guide · 13 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 days ago★★★★★

Advanced Plumbing & Drain

**Excellent Service from Start to Finish!** I had an outstanding experience with Advanced Plumbing! Scheduling was incredibly easy, and they even offered to send someone out the same day. Since the following day worked better for me, they happily accommodated my schedule\. The technician arrived right on time, was… Read full review

Water heater installation+ Responsiveness+ Quality+ Professionalism

MichaelLocal 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. · Edited 2 weeks ago★★★★★

Magic Plumbing Heating & Cooling

I had a leak from the p-trap in our bathroom that I was struggling to correct . I called Magic Plumbing and a technician was at my house in an hour and after 2o minutes of work the problem was solved. I have used Magic for sewer line replacement, hot water heater replacement and installing a sink and toilet in our… Read full review

Paid $2,000+Reasonable priceWater heater installation

MMargret1 reviewiTotal 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. · 3 weeks ago★★★★★

George Salet Plumbing, Inc.

Cameron is an excellent plumber. He was knowledgeable and patient in giving us the information we needed to make a decision on our hot water heaters. Installation was seamless.

Paid $2,000+Water heater installation

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.