Insights

Market leadership Established since 1972 as a premier plumbing and HVAC provider in multiple PA counties, positioning Donnelly’s as a trusted partner for home service needs and potential cross-sell opportunities across plumbing, heating, cooling, and drainage services.

Growth & scale Revenue range of 50M to 100M and a mid-sized team (11-50 employees) indicate a stable, receptive customer base with room for additional value-added services, maintenance programs, and expanded service offerings to increase wallet share.

Quality & training Ongoing NATE certification and manufacturer training suggest openness to premium, tech-enabled solutions and smart-home upgrades, opening opportunities for high-margin equipment sales, warranties, and recurring maintenance.

Ethics & trust Strong adherence to Nexstar Network and BBB standards highlights a reputation for ethical conduct and professional accountability, which can be leveraged in co-marketing, referral partnerships, and government or insurance-aligned service contracts.

Awards & visibility Award recognition for Best Plumbing Company enhances credibility for expansion into adjacent markets, service line pilots (e.g., water quality, sump pumps, well services), and targeted campaigns to homeowners seeking trusted, award-winning providers.

Similar companies to Donnelly's Plumbing, Cooling & Heating

Donnelly's Plumbing, Cooling & Heating Tech Stack

Donnelly's Plumbing, Cooling & Heating uses 8 technology products and services including Bing Ads, TrackJS, MySQL, and more. Explore Donnelly's Plumbing, Cooling & Heating's tech stack below.

  • Bing Ads
    Advertising Networks
  • TrackJS
    Analytics
  • MySQL
    Database
  • Module Federation
    Development
  • Google Fonts API
    Font Scripts
  • Underscore.js
    Javascript Libraries
  • All in One SEO
    Search Engines
  • HSTS
    Security

Donnelly's Plumbing, Cooling & Heating's Email Address Formats

Donnelly's Plumbing, Cooling & Heating uses at least 1 format(s):
Donnelly's Plumbing, Cooling & Heating Email FormatsExamplePercentage
First@4donnellys.comJohn@4donnellys.com
71%
FLast@4donnellys.comJDoe@4donnellys.com
29%

Frequently Asked Questions

What is Donnelly's Plumbing, Cooling & Heating's official website and social media links?

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Donnelly's Plumbing, Cooling & Heating's official website is 4donnellys.com and has social profiles on LinkedIn.

How much revenue does Donnelly's Plumbing, Cooling & Heating generate?

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As of July 2026, Donnelly's Plumbing, Cooling & Heating's annual revenue is estimated to be $50M - $100M.

What is Donnelly's Plumbing, Cooling & Heating's SIC code NAICS code?

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Donnelly's Plumbing, Cooling & Heating's SIC code is 7699 - Repair Shops and Related Services, Not Elsewhere Classified NAICS code is 81 - Other Services (except Public Administration).

How many employees does Donnelly's Plumbing, Cooling & Heating have currently?

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As of July 2026, Donnelly's Plumbing, Cooling & Heating has approximately 30 employees across 2 continents, including North AmericaEurope. Key team members include Vice President: C. D.Director Of Operations: I. T.Accounting Controller: S. M.. Explore Donnelly's Plumbing, Cooling & Heating's employee directory with LeadIQ.

What industry does Donnelly's Plumbing, Cooling & Heating belong to?

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Donnelly's Plumbing, Cooling & Heating operates in the Consumer Services industry.

What technology does Donnelly's Plumbing, Cooling & Heating use?

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Donnelly's Plumbing, Cooling & Heating's tech stack includes Bing AdsTrackJSMySQLModule FederationGoogle Fonts APIUnderscore.jsAll in One SEOHSTS.

What is Donnelly's Plumbing, Cooling & Heating's email format?

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Donnelly's Plumbing, Cooling & Heating's email format typically follows the pattern of First@4donnellys.com. Find more Donnelly's Plumbing, Cooling & Heating email formats with LeadIQ.

When was Donnelly's Plumbing, Cooling & Heating founded?

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Donnelly's Plumbing, Cooling & Heating was founded in 1972.
Donnelly's Plumbing, Cooling & Heating logo

Donnelly's Plumbing, Cooling & Heating

Consumer ServicesPennsylvania, United States11-50 Employees

Donnelly's Plumbing, Cooling & Heating is a mid-sized home-services provider based in Lansdale, Pennsylvania, serving residents across Montgomery, Bucks, Chester, and Delaware counties. Founded in 1972, the company began with plumbing services and later expanded to include heating and cooling, extending its work to drainage, well services, sump pumps, and water quality improvements. The organization emphasizes ongoing technician training and safety, with staff earning industry certifications and participating in manufacturer programs for new products. It adheres to a formal code of ethics and maintains memberships with professional groups and the Better Business Bureau.

Serving residential customers in the same counties, the company provides a full range of plumbing and HVAC services for installation, repair, and maintenance, along with related drain, well, and water-quality work. Based in Lansdale, it functions as a local, full-service provider within the Pennsylvania consumer-services landscape, supported by industry associations and the BBB to reflect its professional standards.

Section iconCompany Overview

SIC Code
7699 - Repair Shops and Related Services, Not Elsewhere Classified
NAICS Code
81 - Other Services (except Public Administration)
Founded
1972
Employees
11-50

Section iconFunding & Financials

  • $50M - $100M

    Donnelly's Plumbing, Cooling & Heating's revenue is estimated to be in the range of $50M - $100M

Section iconFunding & Financials

  • $50M - $100M

    Donnelly's Plumbing, Cooling & Heating's revenue is estimated to be in the range of $50M - $100M

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