What MJ Daly & Sons does

MJ Daly & Sons (legally MJ Daly, LLC) is a Waterbury, Connecticut-based mechanical contracting firm founded in 1882 by Michael Joseph Daly and now operating as a wholly owned subsidiary of Arden Building Companies, LLC following its 2006 acquisition. The company provides integrated mechanical/HVAC construction, fire protection systems, building automation controls, engineering services, virtual design and construction (BIM), and ongoing service and maintenance to commercial, institutional, healthcare, education, biotech/pharma, manufacturing, and government clients across Connecticut and Western Massachusetts.

Its technical platform centers on a Building Information Modeling workflow that combines Autodesk Revit and Navisworks for clash-free 3D design, Trimble layout tools, and 3D laser scanning for existing condition surveys, all feeding an in-house, 53,000-square-foot prefabrication facility that stocks over two million inventoried Victaulic pipe specialties items. MJ Daly's qualified workforce holds NICET, ASME (PP-4833, U-27,071), and NBB & PVI (R-317) certifications, as well as state-level master mechanical, plumbing, sprinkler, and refrigeration licenses across Connecticut and Massachusetts, including DCAMM certification for Massachusetts public work.

The business model blends project-based one-time construction contracts (design-build and plan-spec) on large commercial and institutional projects with recurring service and maintenance agreements covering HVAC, fire protection, and building automation, supported by 24/7/365 emergency response. GTM is relationship-driven enterprise field sales to building owners, facility managers, developers, and general contractors, with prominent client work including the University of Connecticut, Yale University, the SoNo Collection (Norwalk, CT), 101 College Street (New Haven), the Connecticut Army National Guard, and the National Coast Guard Museum. The company is part of the Arden Building Companies group alongside Arden Engineering Constructors, Unique Metal Works, Corporate Mechanical, and Earthwise Energy Technologies.

Name

MJ Daly & Sons

Legal name

MJ Daly, LLC

Website

https://mjdalyllc.com

Company type

Private

Founded year

1882

Operating status

Operating

Headcount range

101–250 employees

Short description

MJ Daly & Sons is a Waterbury, CT mechanical contracting firm providing HVAC, fire protection, building automation, BIM-based design, and maintenance services to commercial, institutional, healthcare, education, and government clients across Connecticut and Western Massachusetts, operating as a subsidiary of Arden Building Companies.

Ownership category

akta.pro rank

Product category

Mechanical Contracting Services

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220), Plumbing, Heating, and Air-Conditioning Contractors (23822)

SIC

Water, Sewer, Pipeline, Comm & Power Line Construction (1623)

akta.pro primary industry

HVAC & Refrigeration Contracting (IMAFALAB)

akta.pro secondary industries

Fire Protection Systems Contracting (Sprinklers, Alarms, Suppression) (IMAFALAD), Electrical Systems Maintenance (LV/MV, Switchgear, UPS) (BPABACAC), New Construction/Renovation Fire & CO System Design & Installation (HSAHAFAJ)

Keywords

• Mechanical contracting services
• Fire protection systems
• Building automation controls
• HVAC installation services
• Pipe fabrication services

Headquarters

HQ city

Waterbury

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Mechanical / HVAC Construction Services: Construction and installation services for mechanical and HVAC systems in new and existing buildings, including upgrades, retrofits, pipe fabrication, and plumbing. Revenue is generated through project-based contracts on a per-project basis, with both design-build and plan-spec delivery methods. MJ Daly serves as prime mechanical contractor on large commercial, institutional, and industrial projects.
2. Fire Protection Systems: Complete fire protection solutions including fire detection, alarms, wet and dry sprinkler systems, clean agent suppression, and explosion protection. Services include design, installation, inspection, and testing of fire protection systems for new construction and retrofit projects.
3. Service & Maintenance Programs: Ongoing service and planned maintenance programs for Mechanical/HVAC, Fire Protection, and Building Automation. Includes 24-Hr Emergency Service available 365 days a year, preventative maintenance agreements, and code compliance inspections. Generates recurring revenue through service agreements and emergency service calls.
4. Building Automation Controls: Design, implementation, and management of building automation control systems for new construction and retrofitting, including HVAC controls, lighting controls, system integration, and customer training. Available as part of new construction projects or standalone upgrades.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

MJ Daly designs, installs, and services mechanical/HVAC, plumbing, fire protection, and building automation systems for commercial, institutional, and industrial buildings. The firm operates a 53,000+ sqft in-house pipe fabrication facility, uses BIM/VDC for pre-construction coordination, and provides 24-hour emergency service and ongoing preventative maintenance programs across Connecticut and Western Massachusetts.

Product overview

MJ Daly is a premier Mechanical Contracting company offering a comprehensive suite of building systems services rather than a traditional software product. The company operates as a single unified service offering comprising six integrated core services: Mechanical/HVAC Systems (construction, installation, retrofits, pipe fabrication), Fire Protection Systems (sprinklers, suppression, pumps), Building Automation Controls (HVAC/lighting control, system integration), Virtual Design & Construction (BIM, 3D modeling, clash detection), Engineering Services (design-build, commissioning), and Service & Maintenance Programs. Additionally, as an authorized dealer, MJ Daly resells Fike fire suppression products including thermal runaway protection systems. All services are delivered through an integrated approach using BIM/Virtual Design & Construction capabilities, with in-house pipe fabrication supporting efficient installation. The company operates a 53,000 sqft fabrication facility and provides 24-hour emergency service across all offerings.

Differentiator

Problem solved

Functional benefit

Products and services

• Mechanical / HVAC Systems Full-service mechanical and HVAC system construction, installation, upgrades, retrofits, plumbing, and 24-hour emergency service for commercial, industrial, and institutional buildings.
• Fire Protection Systems Complete fire protection solutions including wet and dry pipe sprinklers, deluge systems, pre-action systems, standpipe systems, fire pumps, foam systems, Inergen and FM-200 suppression systems, above-ground water storage tanks, underground fire mains and hydrants, and 24-hour emergency service.
• Building Automation Controls Building automation control systems for HVAC and lighting management, including temperature control, lighting control, system design, system integration, training, and 24-hour emergency service to improve energy efficiency and reduce operational costs.
• Engineering Services Professional engineering services including plan spec mechanical system design, design-build, feasibility studies, construction administration, commissioning, and peer review, utilizing 3D/BIM technology.

Quantifiable outcome

• Zero Incidence Rate achieved for 50,000+ work hours (2019/2020) and 110,000-274,999 work hours (2021/2022) – fourth consecutive year winning AGC safety award
• +2 more outcomes

Named customers9 records

Segments8 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

17 partnerships are on record, tiered major, core and minor.

• A/Z CorporationmajorChannel Partner/ Reseller/ Distributor · 15 October 2024General contractor for the National Coast Guard Museum project. MJ Daly is working with A/Z Corporation as the GC on the 83,000-sf museum project in New London, CT. This is a significant project where MJ Daly provides the fire protection scope.
• Fike CorporationcoreTechnology or IntegrationMJ Daly is an authorized Fike dealer. Fike provides fire suppression technology including Fike Blue, which halts thermal runaway in lithium batteries of energy storage systems. MJ Daly designs, installs, and services Fike systems including Fike Blue for ESS fire protection.
• VictauliccoreTechnology or IntegrationMJ Daly is an authorized wholesaler for Victaulic pipe specialties equipment, stocking over two million inventoried items. MJ Daly was the first contracting and stocking distributor for Victaulic 100 years ago, receiving a 100-year appreciation award from Victaulic in 2019. Victaulic products are used extensively in MJ Daly's fabrication operations.
• Arden Building CompaniescoreStrategic or Co-development PartnerMJ Daly is part of one of the largest Mechanical/HVAC Construction companies in New England – Arden Building Companies. The multi-faceted group of geographically diverse firms provides building systems for new and existing buildings. Other Arden companies include Unique Metal Works, Earthwise Energy Technologies, Corporate Mechanical of New England, and Arden Engineering Constructors. Robert M. Bolton is CEO of Arden Building Companies and National MCAA President.
• National Fire Sprinkler Association (NFSA)minorStrategic or Co-development PartnerNFSA staff toured MJ Daly's facilities in 2022 as part of the company's 140th anniversary recognition. MJ Daly fire protection team has been active in the NFSA Connecticut Chapter, attending meetings and using NFSA's Expert of the Day resources. NFSA shared MJ Daly's 140-year history on their platforms.
• Arden Engineering Constructors (AEC)coreStrategic or Co-development PartnerMJ Daly and Arden Engineering Constructors (AEC) share personnel for joint training events, including a 2-day Lunch-n-Learn for all Fire Protection designers, estimators, and project managers from both MJ Daly and AEC. AEC and MJ Daly collaborate on fire protection projects.
• Local Apprenticeship Unions (CT, RI, MA)coreChannel Partner/ Reseller/ DistributorMJ Daly partners with local apprenticeship unions across Connecticut, Rhode Island, and Massachusetts to help students transition from the Heavy Metal Summer Experience camp to earn-while-you-learn apprenticeship programs. These partnerships provide a direct route into the workforce for students.
• Mechanical Contractors Association of Connecticut (MCAC)minorGTM or Marketing PartnerSponsor of MJ Daly's Heavy Metal Summer Experience program. The Mechanical Contractors Association of Connecticut supports workforce development initiatives in the trades.
• DEWALT ToolsminorGTM or Marketing PartnerSponsor of MJ Daly's inaugural Heavy Metal Summer Experience program. DEWALT Tools provides support for the trades training camp and attended the graduation ceremony on July 25.
• ACCA (Air Conditioning Contractors of America)minorOthersMJ Daly is an active member of ACCA, an industry trade association for air conditioning contractors. MJ Daly participates in industry events and training through this affiliation.
• ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers)minorOthersMJ Daly is an active member of ASHRAE, participating in industry standards development and professional development for HVAC engineers and contractors.
• BOMA (Building Owners & Managers Association)minorOthersMJ Daly is a member of BOMA, connecting with building owners and managers for potential project opportunities in commercial real estate.
• MCAA (Mechanical Contractors Association of America)minorOthersMJ Daly is an active member of MCAA. President Edward Carvalho participates in MCAA's Advanced Leadership Institute in conjunction with UNC Kenan-Flagler Business School. MCAA develops talents and business networks of leaders in mechanical contracting.
• NFPA (National Fire Protection Association)minorOthersMJ Daly maintains active membership in NFPA, aligning with fire safety standards and code compliance. MJ Daly's fire protection division adheres to NFPA 13, 13R, and 13D standards.
• NFSA Connecticut ChapterminorStrategic or Co-development PartnerMJ Daly hosted a Side-by-Side Burn event with the NFSA Connecticut Chapter and Waterbury Firefighters Association, demonstrating effectiveness of sprinkler systems. MJ Daly team members actively participate in NFSA Connecticut Chapter meetings.
• Local 669 Sprinkler FittersminorOthersMJ Daly maintains a relationship with Local 669 Sprinkler Fitters, a union representing sprinkler fitters nationwide.
• Local 777 Plumbers & Pipefitters (RI/CT)minorOthersMJ Daly maintains a relationship with Local 777 Plumbers & Pipefitters union representing plumbers and pipefitters in Rhode Island and Connecticut.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• EMCOR Group: Large publicly traded mechanical and electrical services contractor with national reach and a portfolio approach that includes mechanical/HVAC and fire protection similar to MJ Daly's core services, but at much greater scale and across many more geographies.
• APi Group: Public safety, specialty, and industrial services company with substantial fire protection (sprinkler and suppression) and life-safety services overlapping directly with MJ Daly's fire protection business. Operates at national scale with broader service portfolio.
• Southland Industries: Large private mechanical contractor providing design-build HVAC, plumbing, and fire protection with strong BIM/fabrication capabilities similar to MJ Daly's VDC-driven delivery model. Operates across multiple U.S. regions.
• Limbach Holdings: Public specialty mechanical contractor providing HVAC, plumbing, and building automation for commercial/institutional customers. Closely analogous service mix and end-market focus, though Limbach operates across multiple regions versus MJ Daly's CT/Western MA footprint.
• Comfort Systems USA: Public national mechanical contracting platform (HVAC, plumbing, building automation) with similar service mix to MJ Daly. Comparable project-based commercial/institutional mechanical work but at vastly larger scale and multi-region footprint.

Direct peers

• Corporate Mechanical of New England: Another Arden Building Companies mechanical/HVAC construction firm serving New England. Closely comparable business model, customer base, and delivery approach, with parent-level collaboration on bids and resources.
• Arden Engineering Constructors: Sister company under Arden Building Companies providing mechanical, HVAC, and fire protection services in the Northeast. Operates the same integrated mechanical contracting model as MJ Daly, and the two firms even share personnel for joint fire protection training.

Regional players

• Harris Companies: Mechanical and fire protection contractor with strong building automation and fabrication capabilities analogous to MJ Daly's. Operates in the Upper Midwest and Western U.S., so geographic overlap with MJ Daly is limited.
• Shambaugh & Son: Large mechanical and fire protection contractor serving the Midwest. Closely comparable in service mix (HVAC, plumbing, sprinkler, fabrication) but does not directly overlap MJ Daly's Connecticut/Western Massachusetts geography.
• J.F. Ahern Co. Family-owned mechanical and fire protection contractor headquartered in Wisconsin with a comparable multi-trade service offering (HVAC, plumbing, sprinkler, fabrication). Competes in a different geography but is structurally similar in scale and service mix.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat6 records

Key risks5 records

Key highlights7 records

Customer concentration

Compliance13 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 MJ Daly & Sons