What services does William C. Diamond Plumbing & Heating offer?

William C. Diamond Plumbing & Heating offers a wide range of plumbing, heating, cooling, and maintenance services to residential and commercial customers in Livingston, New Jersey, and throughout Morris County. They can handle repair, replacement, equipment installation, and maintenance needs for their clients.

What do customers say about the company's services?

Based on the verified reviews on the company's website, customers are highly satisfied with the services provided by William C. Diamond Plumbing & Heating. One customer, Stephen T., praised the company's work, responsiveness, and commitment to cleanliness during the pandemic.

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William C Diamond Plumbing and Heating

$1.6M revenue • 8 employees • 34 Deforest Ave #9, East Hanover, NJ, 07936, United States

Last Updated May 31, 2026

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Company Overview

Company Name

William C Diamond Plumbing and Heating

Address

34 Deforest Ave #9, East Hanover, NJ, 07936, United States

Website

williamcdiamondplumbing.com

Phone

(973) 703-3666

Approx. Annual Revenue

$1.6M

Employees

Established

2014

Google Reviews

4.9 (530 reviews)

Google Business Category

Plumber

About William C Diamond Plumbing and Heating

William C. Diamond Plumbing & Heating is a plumbing and heating company based in East Hanover, New Jersey. The company has approximately 4 employees and has been serving the Livingston and Morris County areas since 1994, providing a range of plumbing, heating, and cooling services to both residential and commercial customers.

Business Profile

Read from the William C Diamond Plumbing and Heating website on Oct 12, 2026. Hover an item to see the exact wording it came from.

Licenses, certifications & awards

Licensed and InsuredLicensed Insured

Ownership (as declared by the business)

Family-owned

About the website

Website quality (AI-assessed): 8/10 · Current copyright 2025; Complete service pages and contact

Recent changes

What changed on the William C Diamond Plumbing and Heating website and Google listing, as detected by Coldlytics on each visit.

Oct 14, 2026
Google reviews went from 531 to 530

Coldlytics tracks changes like these across millions of businesses, so you can reach companies the moment they add a pixel, start hiring, or switch software.

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William C Diamond Plumbing and Heating

Company Overview

Company Name

Address

Website

Phone

Approx. Annual Revenue

Employees

Established

Google Reviews

Google Business Category

About William C Diamond Plumbing and Heating

Business Profile

Licenses, certifications & awards

Ownership (as declared by the business)

About the website

Recent changes

HVAC Companies near East Hanover, NJ

Frequently Asked Questions about William C Diamond Plumbing and Heating

What services does William C. Diamond Plumbing & Heating offer?

What do customers say about the company's services?

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Technologies Used

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