Patrick J. Kennedy & Sons

What Patrick J. Kennedy & Sons does

Patrick J. Kennedy & Sons (legal entity P.J. Kennedy & Sons Inc.) is a third-generation, family-owned mechanical contracting firm headquartered at 39 Gibson Street, Boston, Massachusetts. Founded in 1925 by Irish immigrant Patrick J. Kennedy as a residential plumbing and gas-fitting business serving Beacon Hill and the South End, the company expanded through the Plumbers and Pipefitters Unions in the 1980s into commercial mechanical contracting across Massachusetts and the broader Northeast. Today the firm operates from a single Boston office with a workforce of roughly 60 employees under the leadership of President Paul K. Kennedy Jr. and Vice President Patrick J. Kennedy.

The company delivers three core mechanical services: commercial HVAC installation (including energy-efficient units, zoned systems, and integrated building management system controls), commercial plumbing (water/sewer lines, gas piping, fixtures, backflow prevention, grease traps), and preventative/emergency HVAC service and maintenance with 24/7 rapid response. Underlying technology is conventional mechanical contracting — licensed trade work, union labor, and project-specific custom design — supplemented by BMS interoperability and high-efficiency equipment selection rather than proprietary platforms or AI tooling.

P.J. Kennedy & Sons earns revenue primarily through project-based subcontracting to tier-one general contractors (Gilbane, Turner, Suffolk, Fontaine Bros., Shawmut, Dimeo) on commercial and institutional construction, plus direct contracts with government and institutional clients (Massachusetts State Police, MassDOT, City of Boston, Newton Public Schools, Mass General Brigham). Pricing is custom and quote-based per project scope, with recurring revenue layered through maintenance and service contracts; the firm does not disclose pricing tiers publicly. Marketing is predominantly referral-driven through long-standing GC relationships rather than digital channels, and the firm serves education, multi-unit residential, public/government, and corporate/healthcare markets on a regional (Massachusetts/Northeast) basis.

Name

Patrick J. Kennedy & Sons

Legal name

P.J. Kennedy & Sons Inc.

Website

https://pjkennedy.com

Company type

Private

Founded year

1925

Operating status

Operating

Headcount range

51–100 employees

Short description

P.J. Kennedy & Sons is a third-generation, family-owned mechanical contracting firm headquartered in Boston, Massachusetts, providing commercial HVAC, plumbing, and 24/7 service/maintenance to general contractors, government agencies, schools, and institutional clients across the Northeast.

Ownership category

akta.pro rank

Product category

Mechanical Contracting Services

NAICS

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

akta.pro industry

PRIMARYIMAFALAB

HVAC & Refrigeration Contracting

Industrials, Manufacturing & Construction/Construction & Civil Engineering/Specialty Trade Contractors (MEP, HVAC, Plumbing, Electrical)

SECONDARYIMAIABAA

HVAC Installation, Service & Repair

Industrials, Manufacturing & Construction/Industrial Services & Facility Operations/Building Maintenance & Repair (MEP/HVAC/Plumbing/Electrical)

SECONDARYIMAFALAC

Plumbing & Pipefitting Contracting

Industrials, Manufacturing & Construction/Construction & Civil Engineering/Specialty Trade Contractors (MEP, HVAC, Plumbing, Electrical)

Keywords

• Commercial HVAC services
• Commercial plumbing services
• Mechanical contracting
• HVAC maintenance
• Building mechanical systems

Headquarters

HQ city

Boston

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. HVAC Installation Services: Project-based revenue from design and installation of commercial HVAC systems for new construction and retrofit projects
2. Commercial Plumbing Services: Plumbing system installation and maintenance services for commercial and industrial facilities
3. Service & Maintenance Contracts: Ongoing maintenance and emergency repair services providing recurring revenue through service contracts

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels1 record

Core offering

Patrick J. Kennedy & Sons is a full-service mechanical contracting firm providing commercial HVAC installation, commercial plumbing systems, and emergency/preventive HVAC service and maintenance. The company designs, installs, and maintains mechanical systems for commercial, industrial, government, educational, and multi-unit residential facilities primarily across Massachusetts and the Northeast, working as both a subcontractor to general contractors and a direct contractor to public institutions.

Product overview

P.J. Kennedy & Sons is a full-service mechanical contracting firm offering a unified portfolio of three core services: Commercial HVAC installation and maintenance, Commercial Plumbing solutions, and Emergency & Preventative HVAC Service & Maintenance. The company provides tailored mechanical contracting solutions for commercial, industrial, and residential facilities across Massachusetts, serving diverse markets including education, government, corporate, and residential sectors. Their offerings span from initial consultation and custom system design to installation, upgrades, and ongoing maintenance support, with a focus on energy-efficient solutions and building management system integration.

Differentiator

Problem solved

Functional benefit

Products and services

• Commercial HVAC
• Commercial Plumbing
• Emergency and Preventive HVAC Service and Maintenance

Named customers10 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• Gilbane Building CompanycoreStrategic or Co-development PartnerOngoing working relationship as mechanical subcontractor on major commercial construction projects including University Hall at UMass Boston. Testimonial from Gilbane Senior MEP Coordinator praising the company's quality workmanship and commitment to project goals.

Scale indicators3 records

Recent moves5 records

Expansion highlights3 records

Broad incumbents

• Southland Industries: National MEP, HVAC, and plumbing contractor with significant presence across the U.S. including New England. Provides overlapping mechanical contracting services to institutional and commercial clients at larger project scale than P.J. Kennedy.
• EMCOR Group: Fortune 500 mechanical and electrical construction services firm with comprehensive HVAC, plumbing, and building services nationwide. Overlaps with P.J. Kennedy's mechanical scope but operates at vastly greater scale, including self-performed GC capability.
• APi Group: Public safety, specialty, and industrial services conglomerate that includes mechanical contracting and building services subsidiaries. Overlaps with P.J. Kennedy's mechanical services vertical within a much broader portfolio.
• Comfort Systems USA: NYSE-listed national provider of HVAC, mechanical, and plumbing services through operating subsidiaries. Comparable service lines and subcontractor model, with much larger scale, geographic breadth, and acquisition-driven growth capacity.

Direct peers

• Arden Engineering Systems: Rhode Island-headquartered mechanical contractor serving commercial, institutional, and industrial clients across New England with HVAC, plumbing, and process piping. Directly comparable in service offering and Northeast geographic focus.
• Limbach Holdings: NASDAQ-listed specialty mechanical contractor (LMB) providing HVAC, plumbing, and building controls across multiple U.S. regions. Comparable in core service offering, though materially larger and geographically diversified.
• Bow Plumbing & Heating: Multi-generation New England mechanical contractor focused on HVAC, plumbing, and sheet metal for institutional and commercial clients. Comparable in regional concentration and family-business orientation.
• GP Plummer & Associates: New Hampshire-based full-service mechanical contractor (HVAC, plumbing, process piping, service) serving commercial and institutional clients in Northern New England. Comparable in service mix and regional, family-business character.
• R.H. White Companies: Auburn, MA-based mechanical, utility, and construction services firm providing HVAC, plumbing, and electrical contracting in New England. Closely comparable to P.J. Kennedy in regional footprint, service mix, and customer base (institutional, commercial, and utility).
• J. Derenzo Companies: Massachusetts-based mechanical contractor providing HVAC, plumbing, and fire protection services to commercial, institutional, and government clients. Direct peer in geography, vertical mix, and service scope.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights5 records

Customer concentration

• Facebookfacebook.com/pjkennedymechanical

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 Patrick J. Kennedy & Sons