# Cornerstone Plumbing

**Trade:** Plumbing · **Phone:** (508) 361-9450 · **Website:** http://www.cornerstoneplumbingma.com/ · **Languages:** English

**Rating: 4.6/5** (medium confidence) — from 70 reviews across 4 sources.
97% of sentiment-scored reviews read net-positive. Last 6 months: 14 reviews, 1 negative.

## The honest read

Cornerstone Plumbing (also doing business as Cornerstone Plumbing & Heating Co) holds an active Massachusetts plumbing license, and its written record is unusually large — 70 Google reviews since 2022, almost all five stars, with 15 of them in just the last six months.

The thing that keeps coming up is speed paired with actual diagnosis. In an April 2026 review, a homeowner said a previous plumber wanted to cut open a wall to chase a leak, but a Cornerstone technician took the time to diagnose it properly and fixed it without cutting in. A March 2026 review described a similar case — a leak from an unknown source traced through a closet wall and repaired the same afternoon. Technicians named Brandon, Tyler, and Josh come up repeatedly across the reviews for water heater swaps, boiler installs, and general repair work, often described as arriving within the hour for urgent calls.

There are two dated complaints worth knowing about. A June 2026 review described paying $2,800 for a water heater installation where the old unit was left behind uninstalled and the new one started leaking from a fitting within a week, with no return calls after. A September 2024 review complained about being charged $975 for a part the reviewer said cost about $90–$200 elsewhere, even though the same-day emergency response itself was praised.

Given the volume and consistency of the praise against those two specific, dated complaints, this looks like a solid, responsive plumbing outfit — worth confirming pricing on parts and getting a clear line on old-equipment removal before a bigger job.

**Strengths:**
- Careful diagnosis — reviewers cite avoiding unnecessary wall cuts and demo
- Fast emergency response — repeated same-hour and same-day calls
- Deep, recent record — 4.9★ across 79 Google ratings, 15 in the last six months

**Concerns:**
- $2,800 water heater complaint — 2026 review cites a leaking install and no follow-up
- Parts pricing complaint — 2024 review cites a marked-up part cost

## Claims & citations

Every claim below is backed by real evidence rows — uncited claims are dropped in code before publication.

- Holds an active Massachusetts plumbing license _(confidence: high)_
  - [State License Registry](https://occupationallicensingandpermitting.mass.gov/madol/s/license-search-page) — “MA plumber license 4700-PL-C registry-verified active — registry holder of record: Cornerstone Plumbing & Heating Co”
- Google shows a 4.9-star rating from 79 ratings _(confidence: high)_
  - [Google](https://www.google.com/maps/search/?api=1&query=Cornerstone%20Plumbing%20and%20Heating%20Co&query_place_id=ChIJecSD6U-TBywRRexL14k8szg) — “Google: 4.9★ from 79 ratings”
- In an April 2026 review, a homeowner said a technician diagnosed a wall leak without cutting the wall open, after a previous plumber had wanted to _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2toeWQwMTNUMlkzU0VwTFZYSktjV0ZGVkhwM1ltYxAB!2m1!1s0x0:0x38b33c89d74bec45!3m1!1s2@1:CAIQACodChtycF9oOkhyd013T2Y3SEpLVXJKcWFFVHp3Ymc%7C%7C?hl=en) — “5★ I had what sounded like a leak in my wall. I had had another plumber come previously who wanted to cut the wall open, Tyler came took his…”
- A March 2026 review described a leak from an unknown source traced through a closet wall and repaired the same afternoon _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2s0ME5ESlphVE0zWTIwd05FdFhSMnBxVjJVeWIzYxAB!2m1!1s0x0:0x38b33c89d74bec45!3m1!1s2@1:CAIQACodChtycF9oOk40NDJZaTM3Y20wNEtXR2pqV2Uyb3c%7C%7C?hl=en) — “5★ I had a leak from an unknown source. Tyler checked out a few rooms, opened up a closet wall, and found the unlikely source of the leak. T…”
- In a 2022 review, a customer said an inspection after buying a home caught a major issue where the builders had used incorrect pipes in multiple locations _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSURPNk5uT1lnEAE!2m1!1s0x0:0x38b33c89d74bec45!3m1!1s2@1:CIHM0ogKEICAgIDO6NnOYg%7C%7C?hl=en) — “5★ Hired Cornerstone plumbing for an inspection after buying our home and having a flood shortly after. Brandon did an outstanding job inspe…”
- A June 2026 review described paying $2,800 for a water heater installation where the old unit was left behind and the new one leaked from a fitting within a week, with no return calls after _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT200d1YxWnZjMmxrT1Zsc1pIQm5MVk4zZW1GdE5tYxAB!2m1!1s0x0:0x38b33c89d74bec45!3m1!1s2@1:CAIQACodChtycF9oOm4wV1Zvc2lkOVlsZHBnLVN3emFtNmc%7C%7C?hl=en) — “1★ Paid Cornerstone Plumbing and Heating Co $2,800 for a water heater install. They left the old unit in my garage and didn't haul it away, …”
- A September 2024 review complained about being charged $975 for a part the reviewer said cost about $90 to $200 elsewhere _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSUNId29YVXJRRRAB!2m1!1s0x0:0x38b33c89d74bec45!3m1!1s2@1:CIHM0ogKEICAgICHwoXUrQE%7C%7C?hl=en) — “2★ Did he answer on a holiday weekend, sure did.  Did he have someone show up within an hour, sure did.  Was the problem fixed quick, sure w…”
- Specializes in Plumbing _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT200d1YxWnZjMmxrT1Zsc1pIQm5MVk4zZW1GdE5tYxAB!2m1!1s0x0:0x38b33c89d74bec45!3m1!1s2@1:CAIQACodChtycF9oOm4wV1Zvc2lkOVlsZHBnLVN3emFtNmc%7C%7C?hl=en) — “1★ Paid Cornerstone Plumbing and Heating Co $2,800 for a water heater install. They left the old unit in my garage and didn't haul it away, …”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2toeWQwMTNUMlkzU0VwTFZYSktjV0ZGVkhwM1ltYxAB!2m1!1s0x0:0x38b33c89d74bec45!3m1!1s2@1:CAIQACodChtycF9oOkhyd013T2Y3SEpLVXJKcWFFVHp3Ymc%7C%7C?hl=en) — “5★ I had what sounded like a leak in my wall. I had had another plumber come previously who wanted to cut the wall open, Tyler came took his…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2s0ME5ESlphVE0zWTIwd05FdFhSMnBxVjJVeWIzYxAB!2m1!1s0x0:0x38b33c89d74bec45!3m1!1s2@1:CAIQACodChtycF9oOk40NDJZaTM3Y20wNEtXR2pqV2Uyb3c%7C%7C?hl=en) — “5★ I had a leak from an unknown source. Tyler checked out a few rooms, opened up a closet wall, and found the unlikely source of the leak. T…”
  - [State License Registry](https://occupationallicensingandpermitting.mass.gov/madol/s/license-search-page) — “MA plumber license 4700-PL-C registry-verified active — registry holder of record: Cornerstone Plumbing & Heating Co”
- Also offers HVAC / Heating & Cooling _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT214SWIzUm5jMUIyTUZrdFUybFFOVUZMYm5oU2RtYxAB!2m1!1s0x0:0x38b33c89d74bec45!3m1!1s2@1:CAIQACodChtycF9oOmxIb3Rnc1B2MFktU2lQNUFLbnhSdmc%7C%7C?hl=en) — “5★ Tyler installed my combi boiler and so with professionalism and explained the whole procces.  Any time I have an issue they are fast to r…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2psRU9ISk1RM2QxVVhKd2F6bFRja2N6ZWxwMVVFRRAB!2m1!1s0x0:0x38b33c89d74bec45!3m1!1s2@1:CAIQACodChtycF9oOjlEOHJMQ3d1UXJwazlTckczelp1UEE%7C%7C?hl=en) — “5★ Brandon is super responsive, got over to give us an estimate right away, and got his guys over to do the work we needed in a very timely …”

## License

Status: **active** (#4700-PL-C, plumber) — verified against the official MA state registry on 2026-09-03, never self-reported.
Re-check at the official registry: https://occupationallicensingandpermitting.mass.gov/madol/s/license-search-page

## Sources

- [Google](https://www.google.com/maps/search/?api=1&query=Cornerstone%20Plumbing&query_place_id=ChIJecSD6U-TBywRRexL14k8szg): 4.9★ from 79 ratings
- [Google Reviews](https://www.google.com/maps/search/?api=1&query=Cornerstone%20Plumbing&query_place_id=ChIJecSD6U-TBywRRexL14k8szg): Listed on this source
- [Thumbtack](https://www.thumbtack.com/fl/miami/water-heater-repair/cornerstone-plumbing/service/548620499408936966): Listed on this source
- [Exa](https://www.homeadvisor.com/rated.YourLocalPlumber.157401875.html): 0 web mentions across the open web (each linked to its source)

## Recent reviews

- **5/5 · Google Reviews · Mynor Flores · 2026-07-29**: Extremely pleased with their timely response and service.  They communicated well and showed up on time and got the work done as needed for me.
- **5/5 · Google Reviews · chris · 2026-07-14**: Cornerstone was extremely quick in response to my Inquiry and was very professional from our first phone call to the end of repair service.
We called about a broken outdoor hose spigot that was leaking and a potential broken water shut off valve inside the house.
Josh was extremely informative as to…
- **5/5 · Google Reviews · Therese Pagano · 2026-06-12**: We recently discovered a leak in the piping connected to our hot water heater and contacted Cornerstone Plumbing for help. They came out first thing the next morning, quickly identified the failed line, and repaired it efficiently. Within just a few hours, we were back up and running with hot water.…
- **1/5 · Google Reviews · Srenu Mallimoggala · 2026-06-06**: Paid Cornerstone Plumbing and Heating Co $2,800 for a water heater install. They left the old unit in my garage and didn't haul it away, and the new one was leaking from a fitting within a week. Won’t return my calls.
- **5/5 · Google Reviews · Nick V · 2026-05-27**: Our second floor bathroom toilet had a leak that was leaking through the floor and coming out of our light fixture above our dining room table.

Tyler came and talked with me about what was going on and determined that it was the wax seal failing on the toilet.  He got to work and now we have the pe…
- **5/5 · Google Reviews · Guy Martin · 2026-04-27**: Top notch service. Arrived on time. I will definitely do business with them again and highly recommend Cornerstone Plumbing for any of your plumbing needs
- **5/5 · Google Reviews · Kristen Houlker · 2026-04-25**: I had what sounded like a leak in my wall. I had had another plumber come previously who wanted to cut the wall open, Tyler came took his time and really leaned into the diagnostic part of his visit. He solved the problem without having to cut into my wall. Very grateful for these guys.
- **5/5 · Google Reviews · Kevin · 2026-04-24**: They did a great job at my house during our bathroom renovation. From start to finish, they were professional, respectful, and easy to work with. They kept everything really clean, which I appreciated, especially with work being done inside the house. Their pricing was fair, and the quality of the w…
- **5/5 · Google Reviews · Lenny Holt · 2026-04-23**: Professional, prompt and knowledgable. I trust Cornerstone with projects big and small. Don’t hesitate to give them a call.
- **5/5 · Google Reviews · Leo Ribeiro · 2026-04-23**: I had a great experience with this Cornerstone. They responded quickly, arrived on time, and were very professional throughout the entire process. The technician Brandon M. explained the issue clearly and fixed it efficiently without trying to upsell unnecessary services. Pricing was fair and transp…

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Data freshness: last scanned 2026-09-01T07:03:15.162Z.
Cite as: Cornerstone Plumbing — Tavlee (https://tavlee.com/contractor/cornerstone-plumbing)
Source: https://tavlee.com/contractor/cornerstone-plumbing