# Koss Plumbing & Heating

**Trade:** Plumbing · **Address:** 36 Washington Ave, West Yarmouth, MA 02673 · **Phone:** (508) 778-4981 · **Website:** http://www.kossplumbing.com/ · **Languages:** English

**Rating: 2.8/5** (low confidence) — from 3 reviews across 5 sources.

## The honest read

Koss Plumbing & Heating is a West Yarmouth-based plumbing and heating contractor run by owner-operator David Koss, who trained at New England Technical College and apprenticed with Carl F. Riedell & Son before working independently. The company serves residential and commercial Cape Cod customers with plumbing, water heater, gas piping, and heating work, and states it has covered Sandwich through Harwich for more than 25 years.

A 2025 Google review from a past customer describes the quality of a bathroom plumbing job in strong terms, saying they had never seen such a neat installation and comparing the finished work to art — but the same reviewer says they were unable to get a call back for follow-up work and had to switch to another plumber, which points to a real gap in responsiveness alongside the praised craftsmanship.

Two other Google reviews, from 2022 and 2025, describe unsafe or aggressive driving by a Koss company truck rather than anything about the plumbing work itself; both reviewers say the driving behavior made them question whether they'd trust the company with work on their home, but neither describes hiring Koss or having work done. Google shows an overall 2.6-star average from 5 ratings, and the business is not BBB accredited, with BBB listing it as Not Rated for lack of information.

Anyone considering Koss Plumbing & Heating for a job should ask directly about current response times before booking, since the only detailed account of the work itself was positive on quality but negative on follow-up contact.

**Strengths:**
- Neat plumbing craftsmanship — a reviewer called finished bathroom work art-like
- Trained tradesman — apprenticed with a Cape Cod plumbing firm after trade school

**Concerns:**
- Callback responsiveness — one past customer couldn't reach the shop for follow-up work
- Company truck driving — two Google reviewers reported unsafe driving, unrelated to workmanship
- No BBB rating — profile lists Not Rated for insufficient information

**Where sources disagree:**
- Self-reported tenure ("over 25 years") is well under BBB's recorded 1985 start date (41 years) — may reflect the owner's personal tenure rather than the company's full registered history, or simple understatement on the site.
- The single detailed work-quality review is strongly positive on craftsmanship, while the platform's 2.6-star average is pulled down largely by two reviews about truck driving rather than plumbing work quality.

## Claims & citations

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

- Owner-operated by David Koss, who trained at New England Technical College and apprenticed with Carl F. Riedell & Son before working as an independent plumbing contractor. _(confidence: high)_
  - [Official Website](http://www.kossplumbing.com) — “Koss Plumbing & Heating is a Cape Cod plumbing and heating contractor, owner-operated by David Koss, serving residential and commercial cust…”
  - [Official Website](http://www.kossplumbing.com) — “Company history (self-reported): On Cape Cod for over 25 years; owner David Koss trained at New England Technical College and apprenticed wi…”
  - [Official Website](http://www.kossplumbing.com) — “Ownership (self-reported): Owner-operated by David Koss, an independent licensed plumbing contractor.”
- Self-reports serving Cape Cod for over 25 years; BBB separately lists the business as started 1/1/1985 (41 years). _(confidence: medium)_
  - [Official Website](http://www.kossplumbing.com) — “Self-reported 25 years in business”
  - [Better Business Bureau](https://www.bbb.org/us/ma/west-yarmouth/profile/plumber/koss-plumbing-heating-0021-434689) — “BBB profile for Koss Plumbing & Heating (West Yarmouth, MA): not BBB accredited, rating listed as Not Rated (insufficient information), Busi…”
- Provides residential and commercial plumbing, water heater, gas piping and heating services on Cape Cod. _(confidence: high)_
  - [Official Website](http://www.kossplumbing.com) — “Koss Plumbing & Heating is a Cape Cod plumbing and heating contractor, owner-operated by David Koss, serving residential and commercial cust…”
- A 2025 Google reviewer described a bathroom plumbing installation as neat, high-quality work, comparing it to art. _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VOR0wwNmJRc3FlMDV3RRAB!2m1!1s0x0:0xa42a31af80800255!3m1!1s2@1:CIHM0ogKENGL06bQsqe05wE%7C%7C?hl=en) — “5★ Koss Plumbing & Heating has done work for us and I've never found anyone who does such a neat job with their work. He "plumbed" a bathroo…”
- The same reviewer who praised the workmanship reported being unable to get a call back for follow-up work and switched to another plumber. _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VOR0wwNmJRc3FlMDV3RRAB!2m1!1s0x0:0xa42a31af80800255!3m1!1s2@1:CIHM0ogKENGL06bQsqe05wE%7C%7C?hl=en) — “5★ Koss Plumbing & Heating has done work for us and I've never found anyone who does such a neat job with their work. He "plumbed" a bathroo…”
- Two Google reviewers (2022 and 2025) describe unsafe or aggressive driving by a Koss company truck, unrelated to any plumbing work performed. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnTUR3X0lDbER3EAE!2m1!1s0x0:0xa42a31af80800255!3m1!1s2@1:CIHM0ogKEICAgMDw_IClDw%7C%7C?hl=en) — “1★ Watched this work truck run a red light and then not even a quarter mile down the road turn left cutting off another car and almost get h…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSURPa2EyeGhBRRAB!2m1!1s0x0:0xa42a31af80800255!3m1!1s2@1:CIHM0ogKEICAgIDOka2xhAE%7C%7C?hl=en) — “1★ Guy in a Koss truck tried to cut in front of my husband and then he gave my husband the finger when my husband didn't stop short for him.…”
- Google shows a 2.6-star average from 5 ratings; BBB lists the business as Not Rated and not accredited, citing insufficient information. _(confidence: high)_
  - [Google](https://www.google.com/maps/search/?api=1&query=Koss%20Plumbing%20%26%20Heating&query_place_id=ChIJkSxiTbYw-4kRVQKAgK8xKqQ) — “Google: 2.6★ from 5 ratings”
  - [Better Business Bureau](https://www.bbb.org/us/ma/west-yarmouth/profile/plumber/koss-plumbing-heating-0021-434689) — “Better Business Bureau grade: Not Rated”
  - [Better Business Bureau](https://www.bbb.org/us/ma/west-yarmouth/profile/plumber/koss-plumbing-heating-0021-434689) — “BBB profile for Koss Plumbing & Heating (West Yarmouth, MA): not BBB accredited, rating listed as Not Rated (insufficient information), Busi…”
- Specializes in Plumbing _(confidence: high)_
  - [Official Website](http://www.kossplumbing.com) — “Koss Plumbing & Heating is a Cape Cod plumbing and heating contractor, owner-operated by David Koss, serving residential and commercial cust…”
- Also offers HVAC / Heating & Cooling _(confidence: medium)_
  - [Official Website](http://www.kossplumbing.com) — “Koss Plumbing & Heating is a Cape Cod plumbing and heating contractor, owner-operated by David Koss, serving residential and commercial cust…”

## License

Status: **not_found** — verified against the official MA state registry, 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=Koss%20Plumbing%20%26%20Heating&query_place_id=ChIJkSxiTbYw-4kRVQKAgK8xKqQ): 2.6★ from 5 ratings
- [Google Reviews](https://www.google.com/maps/search/?api=1&query=Koss%20Plumbing%20%26%20Heating&query_place_id=ChIJkSxiTbYw-4kRVQKAgK8xKqQ): Listed on this source
- [Better Business Bureau](https://www.bbb.org/us/ma/west-yarmouth/profile/plumber/koss-plumbing-heating-0021-434689): Listed on this source
- [Yelp](https://www.yelp.com/biz/koss-plumbing-and-heating-west-yarmouth): Listed on this source
- [Official Website](http://www.kossplumbing.com): 25 yrs in business · Self-reported profile and service details

## Recent reviews

- **5/5 · Google Reviews · William Greenwood · 2025-05-08**: Koss Plumbing & Heating has done work for us and I've never found anyone who does such a neat job with their work. He "plumbed" a bathroom and I hated to close the wall, because it looked like art. Fast forward I can't get a call back - so I've had to go with another plumber, but David does great wo…
- **1/5 · Google Reviews · Jackie Crockett · 2025-03-24**: Watched this work truck run a red light and then not even a quarter mile down the road turn left cutting off another car and almost get hit. Like the other review said why would anyone trust you to work on someone's house? Might want to drive more carefully in a work truck.
- **1/5 · Google Reviews · Christie Lee · 2022-07-07**: Guy in a Koss truck tried to cut in front of my husband and then he gave my husband the finger when my husband didn't stop short for him. If you can't even drive appropriately in a company vehicle, why would I trust you to work on my house?

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Data freshness: last scanned 2026-08-27T22:27:40.477Z.
Cite as: Koss Plumbing & Heating — Tavlee (https://tavlee.com/contractor/koss-plumbing-and-heating-west-yarmouth)
Source: https://tavlee.com/contractor/koss-plumbing-and-heating-west-yarmouth