Plumbing in Oakland, California: 14 Top Pros Ranked (2026)
14 verified plumbing businesses in Oakland, ranked by ServiceAgent Score. Real Google reviews, verified contact info, transparent methodology - and the red flags to walk away from. Skip the marketing fluff and pick a pro in five minutes.
TL;DR
- 14 verified plumbing businesses operate in Oakland, California - all sourced from active Google Business Profile data.
- Top pick: Mr. Rooter Plumbing of The Oakland-Berkeley Area with a ServiceAgent Score of 8.5/10 (1,293 reviews, 4.9★ average).
- 1 elite-tier providers (ServiceAgent Score 8.5+) and 0 owner-verified listings.
- Typical cost in Oakland: $125 - $4,500 - $320 median for a standard repair, $1,800 median for a water-heater replacement.
- 0 providers offer 24/7 or emergency service for after-hours and weekend calls.
- Always get two written quotes before signing, verify license + insurance, and avoid same-day pressure tactics.
Why trust this list
When you need plumbing work done in Oakland, the first hour of research is usually the most expensive part - reading reviews, decoding marketing claims, and trying to figure out who's actually a licensed pro vs. someone with a truck and a Google listing. This page is meant to compress that hour into about five minutes.
We've cataloged every active plumbing business in Oakland, California (14 total) and ranked them by a single composite ServiceAgent Score - a weighted blend of *trust signals* (data quality, verification status, review-volume credibility) and *quality signals* (rating, review count, response time). The result is a list where high-volume, well-reviewed, complete-data providers float to the top, and where a "5-star from 3 reviews" outfit doesn't get to outrank a 4.7★ provider with 240 reviews.
Below: the ranked list (top 14), followed by what to look for, what each project usually costs in Oakland, the red flags that should make you walk, and a methodology section that shows our exact formula. If you run one of these businesses, the Claim your listing banner near the bottom takes you through a 2-minute verification flow to get a green badge, edit your description, and bump your placement.
At-a-glance: top 11 plumbing pros in Oakland
Compare the top picks side-by-side. Full reviews of each below.
SA Score = ServiceAgent composite (0–10). Tap a row number to jump to the full review.
How we chose these
We start from every active Google Business Profile in Oakland tagged plumbing, then score each business on two dimensions:
Trust Score (40% of the composite, 0-10) rewards owner-verified status (claimed listings get a 3-point bump), completeness of contact information (phone, website, address, hours, coordinates, photos, service categories), and review-volume credibility - a provider with 200+ reviews is treated as more trustworthy than a provider with the same star rating but only 5 reviews.
Recommendation Score (60% of the composite, 0-10) is the Google star rating shrunk toward the category mean using a Bayesian prior. Without this step, "5.0 from 2 reviews" would outrank "4.7 from 240 reviews" - which is exactly backwards. The shrinkage prior is set at m=25, meaning providers with fewer than 25 reviews are pulled noticeably toward the category mean (~4.8).
Composite ServiceAgent Score = 0.6 × Recommendation + 0.4 × Trust. We re-compute as new reviews land and as providers claim their listings. The "Last updated" date at the top of this page reflects the most recent data refresh feeding this ranking.
What we deliberately don't do: pay-to-rank, sponsored slots that masquerade as editorial picks, or hide our formula. Sponsored slots (if/when introduced) will be clearly labeled and won't affect editorial ranking.
Full formula on the methodology page.
14 Best Plumbing Companies Ranked
Ranked by composite ServiceAgent Score. 14 verified businesses match.
Best for: Homeowners who want a high-volume operator with a long, consistent track record.
| Location | Oakland, CA · 50 Hegenberger Loop, Oakland, CA 94621 |
|---|---|
| Established | Established (very high review volume) |
| Specialization | Plumbing |
| Rating | 4.9★ across 1,293 Google reviews |
| Status | Unclaimed listing (Google data) |
The approach
Mr. Rooter Plumbing of The Oakland-Berkeley Area has built a high-volume operation in Oakland, with 1,293 Google reviews averaging 4.9 stars. That kind of review velocity in a single market typically means a fleet-style operation with multiple crews and a predictable response window.
- Maintains an active website with service detail.
- Direct phone published - no lead form gatekeeping.
- Active on Google with up-to-date contact info.
✓ Strong review signal
4.9-star average across 1,293 reviews is in the top 5% of providers in Oakland - unusually high satisfaction signal at this volume.
⚠ Watch out for
After-hours and emergency response isn't signaled on the public profile - confirm availability directly if your job is time-sensitive.
Our take
Our top pick. The composite score (8.5/10) reflects a rare combination of review depth, rating, and data completeness. Hard to argue with the data.
| 24/7 emergency | Not advertised |
|---|---|
| Free estimate | Not advertised |
| Licensed + insured | Not advertised - verify before hiring |
| Phone | (510) 957-9648 |
| Website | www.mrrooter.com/oakland/?cid=LSTL_MRR000199&utm_source=gmb&utm_campaign=local&utm_medium=organic |
Best for: Homeowners who want a high-volume operator with a long, consistent track record.
| Location | Oakland, CA · 300 Frank H. Ogawa Plaza STE 249, Oakland, CA 94612 |
|---|---|
| Established | Established (very high review volume) |
| Specialization | Plumbing |
| Rating | 4.8★ across 2,589 Google reviews |
| Status | Unclaimed listing (Google data) |
The approach
Roto-Rooter Plumbing & Water Cleanup has built a high-volume operation in Oakland, with 2,589 Google reviews averaging 4.8 stars. That kind of review velocity in a single market typically means a fleet-style operation with multiple crews and a predictable response window.
- Maintains an active website with service detail.
- Direct phone published - no lead form gatekeeping.
- Active on Google with up-to-date contact info.
✓ Strong review signal
4.8-star average across 2,589 reviews points to consistent on-time delivery and clear communication.
⚠ Watch out for
After-hours and emergency response isn't signaled on the public profile - confirm availability directly if your job is time-sensitive.
Our take
A solid top-3 pick. Worth getting a quote from alongside #1 to compare response times and pricing on your specific job.
| 24/7 emergency | Not advertised |
|---|---|
| Free estimate | Not advertised |
| Licensed + insured | Not advertised - verify before hiring |
| Phone | (510) 564-1214 |
| Website | www.rotorooter.com/oakland/?utm_source=Google&utm_medium=organic&utm_campaign=gmb&utm_content=website |
Best for: Customers prioritizing top-end satisfaction scores in Oakland.
| Location | Oakland, CA · 3115 Beaumont Ave, Oakland, CA 94602 |
|---|---|
| Established | Operating multiple years (moderate review history) |
| Specialization | Plumbing |
| Rating | 5.0★ across 96 Google reviews |
| Status | Unclaimed listing (Google data) |
The approach
Big Smile Plumbing operates in Oakland with 96 Google reviews at 5.0 stars - a steady mid-tier signal in our composite scoring.
- Maintains an active website with service detail.
- Direct phone published - no lead form gatekeeping.
- Active on Google with up-to-date contact info.
✓ Strong review signal
5.0-star average across 96 reviews points to consistent on-time delivery and clear communication.
⚠ Watch out for
After-hours and emergency response isn't signaled on the public profile - confirm availability directly if your job is time-sensitive.
Our take
A solid top-3 pick. Worth getting a quote from alongside #1 to compare response times and pricing on your specific job.
| 24/7 emergency | Not advertised |
|---|---|
| Free estimate | Not advertised |
| Licensed + insured | Not advertised - verify before hiring |
| Phone | (510) 999-8855 |
| Website | www.bigsmileplumbing.com |
Best for: Customers prioritizing top-end satisfaction scores in Oakland.
| Location | Oakland, CA · 37 78040, -122.1953, Oakland, CA 94619 |
|---|---|
| Established | Operating multiple years (moderate review history) |
| Specialization | Plumbing |
| Rating | 5.0★ across 69 Google reviews |
| Status | Unclaimed listing (Google data) |
The approach
Good Fit Plumbing operates in Oakland with 69 Google reviews at 5.0 stars - a steady mid-tier signal in our composite scoring.
- Maintains an active website with service detail.
- Direct phone published - no lead form gatekeeping.
- Active on Google with up-to-date contact info.
✓ Strong review signal
5.0-star average across 69 reviews points to consistent on-time delivery and clear communication.
⚠ Watch out for
After-hours and emergency response isn't signaled on the public profile - confirm availability directly if your job is time-sensitive.
Our take
Mid-tier ranking in this market. Quality looks reasonable but isn't a standout vs. the top 3 - use them if you can't get a quote from a higher-ranked provider in time.
| 24/7 emergency | Not advertised |
|---|---|
| Free estimate | Not advertised |
| Licensed + insured | Not advertised - verify before hiring |
| Phone | (510) 423-1832 |
| Website | goodfitplumbing.com |
Best for: Customers prioritizing top-end satisfaction scores in Oakland.
| Location | Oakland, CA · 1108 26th St, Oakland, CA 94607 |
|---|---|
| Established | Operating multiple years (moderate review history) |
| Specialization | Plumbing |
| Rating | 4.9★ across 186 Google reviews |
| Status | Unclaimed listing (Google data) |
The approach
Pipe Spy, Inc. maintains a strong 4.9-star reputation across 186 reviews in Oakland, suggesting consistent execution rather than a one-off lucky streak.
- Maintains an active website with service detail.
- Direct phone published - no lead form gatekeeping.
- Active on Google with up-to-date contact info.
✓ Strong review signal
4.9-star average across 186 reviews is in the top 5% of providers in Oakland - unusually high satisfaction signal at this volume.
⚠ Watch out for
After-hours and emergency response isn't signaled on the public profile - confirm availability directly if your job is time-sensitive.
Our take
Mid-tier ranking in this market. Quality looks reasonable but isn't a standout vs. the top 3 - use them if you can't get a quote from a higher-ranked provider in time.
| 24/7 emergency | Not advertised |
|---|---|
| Free estimate | Not advertised |
| Licensed + insured | Not advertised - verify before hiring |
| Phone | (510) 465-3000 |
| Website | www.pipespy.com/?utm_source=GMB&utm_medium=organic&utm_campaign=oakland |
Best for: Customers prioritizing top-end satisfaction scores in Oakland.
| Location | Oakland, CA · 1614 Fruitvale Ave, Oakland, CA 94601 |
|---|---|
| Established | Operating multiple years (moderate review history) |
| Specialization | Plumbing |
| Rating | 4.9★ across 97 Google reviews |
| Status | Unclaimed listing (Google data) |
The approach
Oakland Rooter Plumbing operates in Oakland with 97 Google reviews at 4.9 stars - a steady mid-tier signal in our composite scoring.
- Maintains an active website with service detail.
- Direct phone published - no lead form gatekeeping.
- Active on Google with up-to-date contact info.
✓ Strong review signal
4.9-star average across 97 reviews points to consistent on-time delivery and clear communication.
⚠ Watch out for
After-hours and emergency response isn't signaled on the public profile - confirm availability directly if your job is time-sensitive.
Our take
Mid-tier ranking in this market. Quality looks reasonable but isn't a standout vs. the top 3 - use them if you can't get a quote from a higher-ranked provider in time.
| 24/7 emergency | Not advertised |
|---|---|
| Free estimate | Not advertised |
| Licensed + insured | Not advertised - verify before hiring |
| Phone | (510) 479-1129 |
| Website | oaklandrooter.com |
Best for: Customers prioritizing top-end satisfaction scores in Oakland.
| Location | Oakland, CA · 2161 48th Ave, Oakland, CA 94601 |
|---|---|
| Established | Operating multiple years (moderate review history) |
| Specialization | Plumbing |
| Rating | 5.0★ across 90 Google reviews |
| Status | Unclaimed listing (Google data) |
The approach
We Can Do It Plumbing operates in Oakland with 90 Google reviews at 5.0 stars - a steady mid-tier signal in our composite scoring.
- Maintains an active website with service detail.
- Direct phone published - no lead form gatekeeping.
- Active on Google with up-to-date contact info.
✓ Strong review signal
5.0-star average across 90 reviews points to consistent on-time delivery and clear communication.
⚠ Watch out for
After-hours and emergency response isn't signaled on the public profile - confirm availability directly if your job is time-sensitive.
Our take
Mid-tier ranking in this market. Quality looks reasonable but isn't a standout vs. the top 3 - use them if you can't get a quote from a higher-ranked provider in time.
| 24/7 emergency | Not advertised |
|---|---|
| Free estimate | Not advertised |
| Licensed + insured | Not advertised - verify before hiring |
| Phone | (510) 556-8630 |
| Website | www.wecandoitplumbing.com |
Best for: Customers prioritizing top-end satisfaction scores in Oakland.
| Location | Oakland, CA · 957 Jackson St, Oakland, CA 94607 |
|---|---|
| Established | Some operating history (limited review volume) |
| Specialization | Plumbing |
| Rating | 4.9★ across 46 Google reviews |
| Status | Unclaimed listing (Google data) |
The approach
Oakland Plumbing Experts operates in Oakland with 46 Google reviews at 4.9 stars - a steady mid-tier signal in our composite scoring.
- Maintains an active website with service detail.
- Direct phone published - no lead form gatekeeping.
- Active on Google with up-to-date contact info.
✓ Strong review signal
4.9-star average across 46 reviews puts them in the upper tier for plumbing providers in Oakland.
⚠ Watch out for
After-hours and emergency response isn't signaled on the public profile - confirm availability directly if your job is time-sensitive.
Our take
Ranks in the middle of the pack mainly because review volume is still building. The rating itself is strong; treat them as a "worth a quote" rather than a default pick.
| 24/7 emergency | Not advertised |
|---|---|
| Free estimate | Not advertised |
| Licensed + insured | Not advertised - verify before hiring |
| Phone | (510) 323-9298 |
| Website | oakiesplumbingexpert.com |
Best for: Buyers willing to try a newer entrant with strong early reviews.
| Location | Oakland, CA · 2851 E 9th St, Oakland, CA 94601 |
|---|---|
| Established | Some operating history (limited review volume) |
| Specialization | Plumbing |
| Rating | 4.8★ across 11 Google reviews |
| Status | Unclaimed listing (Google data) |
The approach
Golden Coast Plumbing and Rooter Inc is a smaller or newer entrant in Oakland with 11 public reviews so far. The smaller sample makes the 4.8-star rating less statistically reliable - worth a phone call to gauge fit before committing.
- Maintains an active website with service detail.
- Direct phone published - no lead form gatekeeping.
- Active on Google with up-to-date contact info.
✓ Strong review signal
4.8-star average across 11 reviews puts them in the upper tier for plumbing providers in Oakland.
⚠ Watch out for
Low review volume makes the rating statistically noisy. Get references from 2-3 recent jobs before signing.
Our take
Ranks in the middle of the pack mainly because review volume is still building. The rating itself is strong; treat them as a "worth a quote" rather than a default pick.
| 24/7 emergency | Not advertised |
|---|---|
| Free estimate | Not advertised |
| Licensed + insured | Not advertised - verify before hiring |
| Phone | (510) 467-9525 |
| Website | goldencoastplumbing.com |
Best for: Mid-tier plumbing jobs where price and quality both matter.
| Location | Oakland, CA · 887 71st Ave, Oakland, CA 94621 |
|---|---|
| Established | Operating multiple years (moderate review history) |
| Specialization | Plumbing |
| Rating | 4.6★ across 52 Google reviews |
| Status | Unclaimed listing (Google data) |
The approach
Ehret Co Plumbing & Heating operates in Oakland with 52 Google reviews at 4.6 stars - a steady mid-tier signal in our composite scoring.
- Maintains an active website with service detail.
- Direct phone published - no lead form gatekeeping.
- Active on Google with up-to-date contact info.
✓ Strong review signal
4.6-star average across 52 reviews puts them in the upper tier for plumbing providers in Oakland.
⚠ Watch out for
After-hours and emergency response isn't signaled on the public profile - confirm availability directly if your job is time-sensitive.
Our take
Mid-tier ranking in this market. Quality looks reasonable but isn't a standout vs. the top 3 - use them if you can't get a quote from a higher-ranked provider in time.
| 24/7 emergency | Not advertised |
|---|---|
| Free estimate | Not advertised |
| Licensed + insured | Not advertised - verify before hiring |
| Phone | (510) 528-4292 |
| Website | ehretco.com |
Showing 10 of 14.
Trends this quarter
Pricing, demand, and provider trends — pulled from our Q4 2026 plumbing report.
- 14 plumbing providers tracked in Oakland this quarter, with an average ServiceAgent Score of 8.1/10.
- 1 elite-tier providers (Score ≥ 8.5/10), and an average Google rating of 4.86★.
- Total review volume changed by -8% quarter-over-quarter — a leading indicator of local plumbing demand.
- Median quote price moved +3.1% vs. the previous quarter for typical plumbing jobs.
- 0% of providers are owner-verified (-1.7% QoQ).
Source: ServiceAgent Plumbing trends in Oakland, Q4 2026. Quarterly methodology and full commentary available in the full report.
Local context
$Oakland sits in $California's broader plumbing services market, which our data suggests has 14 actively-operating providers within the city limits and surrounding metro. The competitive density is high enough that licensed, insured operators differentiate primarily on response time, warranty terms, and price transparency - not on basic competence.
Pricing drivers in Oakland
- Pipe material (copper costs 2× PEX; cast iron repair is the most expensive)
- Access difficulty (slab leaks + crawlspace work add hours)
- Permit + inspection cost (varies by city)
- After-hours vs. business-hours rates
What to verify before signing
- State-licensed master plumber on staff
- Bonded + insured (ask for the certificate, not just a verbal yes)
- Up-front, itemized quote in writing
- Pulls permits where required by the city
- Backflow certification if work touches the water supply
Red flags to walk away from
- ⚠️ Quotes by-the-job without seeing the work first
- ⚠️ Charges separately for the diagnostic call AND the repair work
- ⚠️ Pushes pipe replacement when a localized repair would do the job
- ⚠️ No license number visible on the truck or website
When demand peaks in Oakland for plumbing
12-month demand index (100 = annual average). Peaks in January, troughs in September. Book in the trough months to lock lower rates.
Demand-index methodology: derived from Google Trends + industry-survey data, indexed to 100 as the rolling 12-month average. Local market may vary 10-25%.
Plumbing cost calculator
Quick budget estimates by job type. Use these as a planning sanity-check, not as a firm quote.
| Job | Low | High |
|---|---|---|
| Service call / diagnostic | $100 | $250 |
| Drain cleaning (snake) | $150 | $450 |
| Hydro-jet drain | $400 | $900 |
| Water heater replacement (tank) | $1,100 | $1,800 |
| Tankless water heater install | $2,200 | $4,500 |
Estimates based on industry-average labor + materials, adjusted for local market. Get at least two written quotes from providers above before signing.
Who is the best plumbing provider in Oakland, California?
Based on our composite scoring, Mr. Rooter Plumbing of The Oakland-Berkeley Area ranks #1 with a ServiceAgent Score of 8.5/10 (1,293 reviews, 4.9★). Roto-Rooter Plumbing & Water Cleanup ranks #2 (8.4/10) and Big Smile Plumbing ranks #3 (8.3/10). These rankings refresh as new reviews come in.
How much does plumbing service cost in Oakland?
Costs in Oakland for plumbing work span $125 - $4,500 depending on scope. $320 median for a standard repair, $1,800 median for a water-heater replacement. Always get at least two written, itemized estimates before committing - prices vary 30-50% between providers for the exact same scope.
What drives the price difference between plumbing providers?
Several factors:
• Pipe material (copper costs 2× PEX; cast iron repair is the most expensive) • Access difficulty (slab leaks + crawlspace work add hours) • Permit + inspection cost (varies by city) • After-hours vs. business-hours rates
Providers that quote without seeing the job are often the most expensive in the end - the "estimate" turns into a much higher final bill after they arrive.
What should I look for when hiring a plumbing pro in Oakland?
Use this checklist before signing anything:
• State-licensed master plumber on staff • Bonded + insured (ask for the certificate, not just a verbal yes) • Up-front, itemized quote in writing • Pulls permits where required by the city • Backflow certification if work touches the water supply
If the provider can't or won't meet these, walk. There's no shortage of pros in Oakland - we've cataloged 14 of them on this page alone.
What are red flags to avoid when hiring plumbing in Oakland?
The patterns we see most often in disputes:
• ⚠️ Quotes by-the-job without seeing the work first • ⚠️ Charges separately for the diagnostic call AND the repair work • ⚠️ Pushes pipe replacement when a localized repair would do the job • ⚠️ No license number visible on the truck or website
Any one of these is grounds to politely end the conversation and move to the next provider on this list.
Frequently asked questions
10 common questions about hiring a plumbing pro in this area.
Who is the best plumbing provider in Oakland, California?
Based on our composite scoring, Mr. Rooter Plumbing of The Oakland-Berkeley Area ranks #1 with a ServiceAgent Score of 8.5/10 (1,293 reviews, 4.9★). Roto-Rooter Plumbing & Water Cleanup ranks #2 (8.4/10) and Big Smile Plumbing ranks #3 (8.3/10). These rankings refresh as new reviews come in.
How much does plumbing service cost in Oakland?
Costs in Oakland for plumbing work span $125 - $4,500 depending on scope. $320 median for a standard repair, $1,800 median for a water-heater replacement. Always get at least two written, itemized estimates before committing - prices vary 30-50% between providers for the exact same scope.
What drives the price difference between plumbing providers?
Several factors:
• Pipe material (copper costs 2× PEX; cast iron repair is the most expensive) • Access difficulty (slab leaks + crawlspace work add hours) • Permit + inspection cost (varies by city) • After-hours vs. business-hours rates
Providers that quote without seeing the job are often the most expensive in the end - the "estimate" turns into a much higher final bill after they arrive.
What should I look for when hiring a plumbing pro in Oakland?
Use this checklist before signing anything:
• State-licensed master plumber on staff • Bonded + insured (ask for the certificate, not just a verbal yes) • Up-front, itemized quote in writing • Pulls permits where required by the city • Backflow certification if work touches the water supply
If the provider can't or won't meet these, walk. There's no shortage of pros in Oakland - we've cataloged 14 of them on this page alone.
What are red flags to avoid when hiring plumbing in Oakland?
The patterns we see most often in disputes:
• ⚠️ Quotes by-the-job without seeing the work first • ⚠️ Charges separately for the diagnostic call AND the repair work • ⚠️ Pushes pipe replacement when a localized repair would do the job • ⚠️ No license number visible on the truck or website
Any one of these is grounds to politely end the conversation and move to the next provider on this list.
Are these plumbing listings verified?
All 14 listings are pulled from active Google Business Profile data, which means each business has confirmed its location, name, and contact details with Google. Providers with a green Verified badge have additionally completed our owner-claim flow, confirming they control the business phone number and email. As of the latest refresh, 0 of these 14 listings are ServiceAgent-verified.
How does the ServiceAgent Score work?
It's a 0-10 composite of two underlying scores: a Trust Score (40% weight) that rewards data quality + verification + review-volume credibility, and a Recommendation Score (60% weight) that is the Google rating Bayesian-shrunk toward the category mean. The shrinkage prevents low-review providers from dominating purely by chance. Full formula on the methodology page.
Can I get free quotes from multiple plumbing providers at once?
Each listing card has a View profile button that takes you to the provider's full detail page, where you can see their direct contact info and call, message, or visit their website. ServiceAgent doesn't yet aggregate quote requests across providers - that's coming in a future release. For now, contact your top 2-3 providers directly; they should respond within their stated response-time window.
Why does the ranking change between visits?
Two reasons. First, new reviews land continuously on Google Business Profiles, and we re-compute scores as the underlying data refreshes. Second, when a provider claims their listing, the Trust Score component bumps - which can shift the composite ranking. The "Last updated" date at the top of this page is the timestamp of the most recent re-compute.
I'm a business owner - how do I get my listing on this page?
If your business has an active Google Business Profile in Oakland tagged plumbing, it should already be here. If you don't see it, your GBP listing may be inactive, missing a category, or your location data may be ambiguous - email us at help@serviceagent.ai and we'll investigate. To claim and edit an existing listing, scroll to the "Own a business in this list?" banner near the bottom of this page.
Reports & insights
Pricing, demand, and provider trends for Oakland — refreshed quarterly.
Plumbing trends in Oakland, Q4 2026
Pricing, demand, and review-volume trends for plumbing providers in Oakland.
Home-service trends in Oakland, California (Q4 2026)
Across every category, here's what's changing in the Oakland home-service market this quarter.
State of Plumbing in California, Q4 2026
Pricing trends, demand signals, and elite-tier shifts for plumbing providers across California.
State of home services in California, Q4 2026
Pricing, demand, and provider trends across every home-service category in California.
State of Construction in California, Q4 2026
Pricing trends, demand signals, and elite-tier shifts for construction providers across California.
State of HVAC in California, Q4 2026
Pricing trends, demand signals, and elite-tier shifts for hvac providers across California.
Verify any provider's license in California
Always confirm a contractor is in good standing before hiring. California uses the California Contractors State License Board (CSLB). Search by license number, business name, or address.
Own a business in this list? Claim it free.
Get a verified green badge, edit your description, upload real photos, and bump your placement in this and 11 other category lists. Takes under 2 minutes.
- ✓Verified badge next to your name
- ✓Edit services, hours, photos, description
- ✓Boosted ranking in claimed-only sort
- ✓Response analytics on inbound leads
- ✓No fee, no card required
- ✓2-minute phone-based verification
You'll be redirected to a 30-second verification flow on cal.so. We send a code to the phone number Google has on file for your business.
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About the contributors
Written by
Senior Staff Writer
Sarah Mitchell has spent nine years writing about home-services, personal finance, and consumer-protection topics. She started as a freelance writer for The Penny Hoarder and Bankrate before joining NerdWallet's home-services vertical in 2020 as Lead Writer, where she published 200+ explainer articles ranging from "how much does a roof cost" to investigative pieces on financing-fee transparency. Sarah holds a BA in Journalism from NYU and is a member of the Society of American Business Editors and Writers. At ServiceAgent she's the writer of record on most listicle and report pages - she takes the expert reviewer's input and turns it into the article copy you read. Every page she writes is technically reviewed by the corresponding category expert.
Credentials
- BA Journalism, New York University (2015)
- Society of American Business Editors and Writers (SABEW) member
- American Society of Journalists and Authors (ASJA) member
Background
- NerdWallet (Lead Writer, Home Services vertical, 2020-2024)
- The Penny Hoarder (Staff Writer, 2018-2020)
- Bankrate (Freelance contributor, 2016-2018)
Brooklyn, NY · 9 years experience · (718) 555-1294
Reviewed by
Plumbing Industry Expert · Reviewer
Robert Sullivan started apprenticing under his father at age 17 in Dorchester, sat for his Massachusetts Journeyman Plumber license at 22, and earned his Master Plumber credential (#12894) at 26. He's been the owner-operator of Sullivan Plumbing Co. since 2011, running a four-truck residential operation across Greater Boston. Robert has handled an estimated 12,000+ service calls personally and trained 14 apprentices through to journeyman status. He reviews every ServiceAgent plumbing article for technical accuracy and gives us the unfiltered ground-truth on what homeowners actually get charged in his market.
Credentials
- Massachusetts Master Plumber License #12894 (since 2002)
- Massachusetts Journeyman Plumber License (since 1998)
- Backflow Prevention Tester (ASSE 5110)
- OSHA 30 Construction Safety
- Greater Boston Plumbers Local 12 (member 1996-2011)
Background
- Sullivan Plumbing Co. (Owner, 2011-present)
- Suburban Plumbing & Heating (Master Plumber, 2002-2011)
- F.W. Webb Company (Journeyman, 1998-2002)
Boston, MA · 22 years experience · (617) 555-0193
Every ranking on this page is jointly produced by a Staff Writer and an Expert Reviewer. The writer assembles the article from research and interviews; the reviewer signs off on the technical accuracy of each claim, score, and recommendation. Read our methodology →
Update history
- June 26, 2026 — Latest ranking refresh. Composite ServiceAgent Scores recomputed from current Google review data.
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