P.J. Dionne Company, Inc.

What P.J. Dionne Company, Inc. does

P.J. Dionne Company, Inc. is a privately held commercial mechanical contractor founded in 1991 and headquartered at 64 Industrial Parkway, Woburn, Massachusetts. The firm provides commercial plumbing, HVAC, service and maintenance, in-house BIM/prefabrication, and pre-construction services to public and private organizations across the Greater Boston area. Plumbing accounts for approximately 75 percent of company revenue, with the remainder split among HVAC installation, service contracts, and pre-construction work. The company is family-owned and led by founder Paul J. Dionne (President), with multiple family members serving in operational and financial leadership roles including Michael E. Dionne (VP of Pre-Construction) and Dawn M. Dionne (Treasurer); no external investors or private equity backing is evidenced.

The firm serves enterprise clients across nine verticals — corporate, public and government, life sciences and technology, education, hospitality, healthcare, restaurants and retail, residential, and specialty/unique projects — operating exclusively as a subcontractor to leading Greater Boston general contractors such as Shawmut Design & Construction, Columbia Construction, Suffolk Construction, Skanska, Wise Construction, Structure Tone, Gilbane Construction, and Vanderweil. Notable end-clients include Mass General Brigham, Morgan Stanley, JPMorgan Chase, HubSpot, Takeda, MIT, Boston College, Simmons University, Hilton Boston, Westin Copley Place, Logan Airport (Massport), and Target, with project values ranging from quick service calls to several million dollars for complex new construction or renovation work. Representative engagements include the 320,000 sq. ft. Logan Airport Terminal E modernization, a 380,000 sq. ft. Mass General Brigham outpatient renovation, MIT Graduate Junction Housing (327,000 sq. ft., LEED Platinum), Takeda's 280,000 sq. ft. lab fit-outs, and Simmons University's 398,000 sq. ft., 20-story Living and Learning Center.

The company operates a project-based, quote-driven commercial contracting model with no public pricing or disclosed financials. Its primary technological differentiation is an in-house Building Information Modeling (BIM) team with proprietary company-specific drafting standards, an in-house prefabrication shop for quality and safety control, and enhanced CAD and 3-D drawing capabilities. The firm is a signatory to UA Plumbers Local 12 and a member of the Greater Boston Plumbing Contractors Association. Geographic scope is explicitly limited to the Greater Boston area with no evidence of multi-region or international operations; revenue, headcount, and detailed financial metrics are not publicly disclosed.

Name

P.J. Dionne Company, Inc.

Legal name

P.J. Dionne Company, Inc.

Website

https://pjdionne.com

Company type

Private

Founded year

1991

Operating status

Operating

Headcount range

11–50 employees

Short description

P.J. Dionne Company is a family-owned commercial plumbing and HVAC subcontractor serving enterprise clients across healthcare, education, life sciences, hospitality, corporate, and government verticals in the Greater Boston area since 1991.

Ownership category

akta.pro rank

Product category

Mechanical Contracting Services

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220)

SIC

Construction - Special Trade Contractors (1700)

akta.pro primary industry

Plumbing & Pipefitting Contracting (IMAFALAC)

akta.pro secondary industry

HVAC & Refrigeration Contracting (IMAFALAB)

Keywords

• Commercial plumbing services
• HVAC installation
• Mechanical contracting
• Pre-construction services
• BIM coordination

Headquarters

HQ city

Woburn

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Marketing or Sales

Revenue model

1. Commercial Plumbing Installation: New construction and renovation plumbing installation services for commercial projects. Projects range from quick service calls to complex projects valued at several million dollars. Plumbing comprises approximately 75 percent of work.
2. HVAC Installation and Service: Commercial heating, ventilation, and air conditioning services including new construction, renovations, energy upgrades, one-time repairs, and ongoing service contracts.
3. Service and Maintenance: One-time issue resolution and service contract basis maintenance including annual/seasonal checkups and scheduled care of mechanical systems.
4. Pre-Construction Services: Bid preparation and review, detailed documentation from schematic to construction documents, scope gap identification and resolution.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

P.J. Dionne Company is a commercial plumbing and HVAC mechanical subcontractor providing new construction, renovation, service, and maintenance services to general contractors and project owners across the Greater Boston area. The firm also offers in-house BIM coordination, prefabrication, and pre-construction services, with plumbing representing approximately 75 percent of its work. Project scopes range from quick service calls to complex installations valued at several million dollars.

Product overview

P.J. Dionne Company, Inc. is a commercial plumbing and HVAC service contractor offering an integrated portfolio of services rather than a software product platform. The core offerings include Commercial Plumbing (which comprises approximately 75% of their work), HVAC Services, Service & Maintenance, BIM / Pre-Fab (in-house Building Information Modeling and prefabrication), and Pre-Construction Services. These services work together to provide end-to-end mechanical contracting solutions from project initiation through completion and ongoing maintenance. The company serves various industries including corporate, healthcare, education, hospitality, life sciences, and government/public sectors across the Greater Boston area.

Differentiator

Problem solved

Functional benefit

Products and services

• Commercial Plumbing Full-service commercial plumbing installation and maintenance for general contractors and project owners across the Greater Boston area. Projects range from quick service calls to complex new construction or renovation projects valued at several million dollars; plumbing represents approximately 75 percent of company work.
• HVAC Services Commercial heating, ventilation, and air conditioning services including new construction, renovations, energy upgrades, one-time repairs, and ongoing service contracts. Specializes in hospital, life science, and institutional projects with custom solutions.
• Service & Maintenance Plumbing and HVAC service for one-time issues and service contract basis, including annual/seasonal checkups and scheduled care of mechanical systems. Identifies conditions that limit system performance and offers cost-effective solutions.
• BIM / Pre-Fab In-house Building Information Modeling (BIM) team providing design coordination and prefabrication services. The prefabrication shop supports quality control and provides safety advantages such as reduced on-site hazards, improved ergonomics, and minimized fall risk.
• Pre-Construction Services Bid preparation and review, detailed documentation from schematic to construction documents, scope gap identification and resolution, and client-centric pre-construction support.

Quantifiable outcome

• Plumbing comprises approximately 75 percent of company work, establishing dominant expertise in this service line

Named customers16 records

Segments9 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Twelve partnerships are on record, tiered core and minor.

• UA Plumbers Local 12coreOthersSignatory partner to UA Plumbers Local 12, providing access to skilled union plumbers and maintaining industry standards. Also signatory to Greater Boston Plumbing Contractors Association.
• Shawmut Design & ConstructioncoreStrategic or Co-development PartnerWorking as subcontractor on 26 Court Office Renovation for City of Boston, 175,000 sq. ft. 11-story municipal building with extensive demolition and fit-out phases
• Structure Tone Building GroupcoreStrategic or Co-development PartnerPartnered on Morgan Stanley Bravo high-end office renovation at One Post Office Square, Boston, spanning floors 14-21
• Wise Construction and Columbia ConstructioncoreStrategic or Co-development PartnerLong-term partnerships supporting HubSpot's ongoing expansion in Canal Park, Cambridge with multiple project phases
• Columbia ConstructioncoreStrategic or Co-development PartnerOngoing partnership for Westin Copley Place Boston renovations (795 guest rooms) and other hotel renovation projects
• Suffolk ConstructioncoreStrategic or Co-development PartnerPartnered on Logan Airport Terminal E modernization, 320,000 Sq. Ft. project with four new gates
• Wise ConstructioncoreStrategic or Co-development PartnerSubcontracted by Wise Construction for Nan Fung Life Science Real Estate project at 470 Atlantic Ave, installation on 7 floors
• Gilbane ConstructioncoreStrategic or Co-development PartnerPartnered on Lemuel Shattuck Hospital relocation project involving multiple state departments
• VanderweilcoreStrategic or Co-development PartnerCollaborating on Takeda lab spaces at 650 East Kendall Street, 280,000 sq. ft. with flexible workspace design
• SkanskacoreStrategic or Co-development PartnerPartnered on Simmons University Living and Learning Center, 398,000 sq. ft. phased 20-story project
• Somerville High SchoolminorGTM or Marketing PartnerEducational partnership hosting plumbing shop students for hands-on learning, inspiring next generation of plumbers
• Greater Boston Plumbing Contractors AssociationcoreOthersSignatory member association supporting industry standards and collaboration in Greater Boston plumbing sector

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Southland Industries: National design-build mechanical contractor delivering plumbing, HVAC and process systems across healthcare, higher-ed and commercial markets. Overlaps with PJ Dionne on healthcare and institutional mechanical scopes, but operates at multi-region scale with design-assist capabilities.
• EMCOR Group: Largest publicly traded mechanical and electrical contractor in the U.S., offering plumbing, HVAC and building services nationally. Overlaps with PJ Dionne in commercial plumbing and HVAC but operates as a broad multi-trade, multi-region incumbent rather than a focused Boston specialist.
• Comfort Systems USA: National publicly traded mechanical services consolidator with plumbing and HVAC operations across the U.S. A broad incumbent offering overlapping plumbing and HVAC services to commercial customers; competes for some of the same Boston-area enterprise work but at much greater scale and geographic breadth.
• Limbach Holdings: Public mechanical contractor with focus on complex plumbing, HVAC and electrical scopes for healthcare, life sciences and higher-education clients. Comparable vertical mix to PJ Dionne (healthcare, life sciences, education) but with a broader geographic footprint and public-company scale.

Direct peers

• J. Derenzo Companies: Boston-area mechanical and plumbing contractor providing commercial plumbing, HVAC and process piping services. Highly comparable to PJ Dionne in geographic focus, service mix (plumbing + HVAC + service), and reliance on Boston-area general contractor relationships.
• Arden Engineering Systems: Rhode Island-based mechanical contractor with growing Greater Boston presence providing plumbing, HVAC and process piping for commercial, healthcare and life sciences projects. Comparable service portfolio and target customer mix in the New England healthcare/life sciences vertical.
• R.H. White Companies: Massachusetts-based multi-trade construction services firm with mechanical, plumbing and HVAC capabilities serving commercial, institutional and utility clients in New England. Comparable regional specialty mechanical contractor competing for similar Boston-area bid opportunities.
• Bay State Mechanical Services: Maine- and Massachusetts-licensed mechanical and plumbing contractor serving commercial, institutional and industrial customers. Comparable regional specialty mechanical contractor with similar plumbing/HVAC service mix and union labor model.
• Chapman Mechanical Services: Greater Boston mechanical services contractor delivering plumbing, HVAC and mechanical contracting for commercial, healthcare and institutional projects. Closely aligned with PJ Dionne on end markets, project type and union-affiliated Boston operational footprint.
• Allied Mechanical: New Hampshire/MA mechanical services contractor delivering plumbing, HVAC, and process piping across the greater New England commercial and institutional markets. Comparable mid-size union mechanical contractor competing for similar regional project opportunities.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/pjdionnecompany
• LinkedInlinkedin.com/company/pj-dionne-company-inc

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about P.J. Dionne Company, Inc.