# EFR Mechanical

**Trade:** Plumbing · **Address:** 108 Clematis Ave #5, Waltham, MA 02453, USA · **Phone:** (781) 572-3084 · **Website:** https://www.efrmechanical.com/ · **Languages:** English

**Rating: 3.4/5** (low confidence) — from 0 reviews across 5 sources.

## The honest read

EFR Mechanical is a Waltham plumbing shop whose Massachusetts plumbing licence (4464-PL-C) is active, and which holds an active Massachusetts Supplier Diversity Office Minority Business Enterprise certification. The company's site describes plumbing services plus commercial HVAC-R maintenance, repair and installation.

Its BBB profile is A+ and accredited since November 2021, and shows an LLC in business since 2019 with 6 employees, listing plumbing and HVAC services to commercial customers. A 2021 article on massplumbers.com described the owner of EFR Mechanical as running a growing plumbing and heating contractor. Google shows 4 stars from 4 ratings.

**Strengths:**
- Active plumbing licence — Massachusetts licence 4464-PL-C is active
- BBB A+ — accredited since November 2021

## Claims & citations

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

- Massachusetts plumbing licence 4464-PL-C is active (holder: EFR Mechanical LLC) _(confidence: high)_
  - [State License Registry](https://occupationallicensingandpermitting.mass.gov/madol/s/license-search-page) — “MA plumber license 4464-PL-C registry-verified active — registry holder of record: EFR Mechanical LLC”
- Massachusetts Supplier Diversity Office Minority Business Enterprise certification 20220143 is active _(confidence: high)_
  - [Diversity Certification Registry](https://diversitycertification.mass.gov/BusinessDirectory/BusinessDirectorySearch.aspx) — “Massachusetts Supplier Diversity Office Minority Business Enterprise (MBE) certification 20220143 verified active — registry holder of recor…”
- BBB grade A+, accredited since 11/2/2021 _(confidence: high)_
  - [Better Business Bureau](https://www.bbb.org/us/ma/south-waltham/profile/plumbing-and-heating/efr-mechanical-0021-547914) — “Better Business Bureau grade: A+”
  - [Better Business Bureau](https://www.bbb.org/us/ma/south-waltham/profile/plumbing-and-heating/efr-mechanical-0021-547914) — “Listed certification: BBB Accredited Business (since 11/2/2021)”
- BBB shows an LLC in business since 2019 with 6 employees, listing plumbing and HVAC services to commercial customers _(confidence: medium)_
  - [Better Business Bureau](https://www.bbb.org/us/ma/south-waltham/profile/plumbing-and-heating/efr-mechanical-0021-547914) — “BBB-accredited A+ profile for EFR Mechanical of South Waltham, MA — an LLC in business since 2019 with 6 employees, listing plumbing and HVA…”
- BBB lists Massachusetts plumbing board licence numbers 4464 and 16771 _(confidence: medium)_
  - [Better Business Bureau](https://www.bbb.org/us/ma/south-waltham/profile/plumbing-and-heating/efr-mechanical-0021-547914) — “Licence listed on Better Business Bureau: license number of 4464 for this business, issued by Massachusetts Board of State Examiners of Plum…”
  - [Better Business Bureau](https://www.bbb.org/us/ma/south-waltham/profile/plumbing-and-heating/efr-mechanical-0021-547914) — “Licence listed on Better Business Bureau: license number of 16771 for this business, issued by Massachusetts Board of State Examiners of Plu…”
- 4 stars from 4 Google ratings _(confidence: medium)_
  - [Google](https://maps.google.com/?cid=17538986700260395535&g_mp=CiVnb29nbGUubWFwcy5wbGFjZXMudjEuUGxhY2VzLkdldFBsYWNlEAIYBCAA) — “Google: 4★ from 4 ratings”
- The company describes plumbing services and commercial HVAC-R maintenance, repair and installation _(confidence: medium)_
  - [Official Website](https://www.efrmechanical.com) — “EFR Mechanical, LLC is a Waltham, MA contractor providing plumbing services and commercial HVAC-R maintenance, repair and installation.”
- Specializes in Plumbing _(confidence: high)_
  - [Official Website](https://www.efrmechanical.com) — “EFR Mechanical, LLC is a Waltham, MA contractor providing plumbing services and commercial HVAC-R maintenance, repair and installation.”
  - [Better Business Bureau](https://www.bbb.org/us/ma/south-waltham/profile/plumbing-and-heating/efr-mechanical-0021-547914) — “Services offered (Better Business Bureau): Plumbing, Heating and Air Conditioning, HVAC, Plumbing”
  - [State License Registry](https://occupationallicensingandpermitting.mass.gov/madol/s/license-search-page) — “MA plumber license 4464-PL-C registry-verified active — registry holder of record: EFR Mechanical LLC”
- Also offers HVAC / Heating & Cooling _(confidence: medium)_
  - [Official Website](https://www.efrmechanical.com) — “EFR Mechanical, LLC is a Waltham, MA contractor providing plumbing services and commercial HVAC-R maintenance, repair and installation.”
  - [Better Business Bureau](https://www.bbb.org/us/ma/south-waltham/profile/plumbing-and-heating/efr-mechanical-0021-547914) — “Services offered (Better Business Bureau): Plumbing, Heating and Air Conditioning, HVAC, Plumbing”

## Ownership

- **Certified minority-owned** — verified against Massachusetts Supplier Diversity Office (MBE #20220143, verified 2026-08-12). Re-check: https://diversitycertification.mass.gov/BusinessDirectory/BusinessDirectorySearch.aspx

## License

Status: **active** (#4464-PL-C, plumber) — verified against the official MA state registry on 2026-09-25, never self-reported.
Re-check at the official registry: https://occupationallicensingandpermitting.mass.gov/madol/s/license-search-page

## Sources

- [Exa](https://massplumbers.com/2021/06/): 4 web mentions across the open web (each linked to its source)
- [Official Website](https://www.efrmechanical.com): Self-reported profile and service details
- [Better Business Bureau](https://www.bbb.org/us/ma/south-waltham/profile/plumbing-and-heating/efr-mechanical-0021-547914): Listed on this source
- [Procore Construction Network](https://network.procore.com/p/efr-mechanical-llc-waltham): Listed on this source
- [Google](https://www.google.com/maps/search/?api=1&query=EFR%20Mechanical&query_place_id=ChIJtYFQwlCd44kRD0pSdXr_ZvM): 4.0★ from 4 ratings

## Mentions

Unverified third-party mentions found on the open web — relay with attribution ("a Reddit commenter said…"), never as Tavlee's own finding.

- “The event also included volunteers from EFR Mecha” — high-profile.com (2025-05-28) — https://www.high-profile.com/plumbers-local-12-gbpca-participate-in-26th-annual-charles-river-earth-day-cleanup/
- “he is now the owner of EFR Mechanical, a growing plumbing and heating contractor” — massplumbers.com (2021-06-17) — https://massplumbers.com/2021/06/
- “Tim Fandel, Local 12’s business manager, assured Souza that the union would support him if he started a shop.” — massplumbers.com (2021-06-11) — https://massplumbers.com/2021/06/11/ricardo-souza-reinvented-himself-as-a-plumbing-contractor/
- “In his native Brazil, Ricardo Souza was proficient with boom microphones and video cameras.” — massplumbers.com — https://massplumbers.com/wp-content/uploads/2021/06/The-Pipeline-July-2021.pdf

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Data freshness: last scanned 2026-08-08T06:27:04.599Z.
Cite as: EFR Mechanical — Tavlee (https://tavlee.com/contractor/efr-mechanical-waltham)
Source: https://tavlee.com/contractor/efr-mechanical-waltham