Peterson Mechanical

What Peterson Mechanical does

Peterson Mechanical Inc. is a Sonoma, California-based mechanical contracting firm founded in 1915 and now in its fourth generation of Peterson family leadership. The company delivers HVAC, plumbing, process piping, custom sheet metal fabrication, and commercial refrigeration services to commercial, healthcare, education, technology, winery/hospitality, and residential customers across seven San Francisco Bay Area counties, with a 24/7 service department supporting ongoing maintenance and emergency response. Its revenue model is professional-services-based, driven by design-build, design-assist, plan/spec, and preconstruction delivery methods priced on a quote basis per project, with limited published unit pricing ($125 fall tune-up, $175 residential service fee referenced in a rebate program).

Core technical capability centers on a 3D BIM pipeline (Autodesk Fabrication, Revit, Navis Works, CAD Mech, CAD Duct) connected to in-house CMC duct fabrication and plumbing/piping prefabrication shops, supported by Trimble Total Station digital site layout and Field iPad/Plangrid drawing management for field crews. This digital-to-physical prefabrication flow compresses field labor, enables just-in-time delivery under tight schedules, and supports specialized work up to Class 10 clean rooms and OSHPD-regulated healthcare facilities.

The company operates with 130+ employees, including union-trained tradespeople (Sheet Metal Workers and United Association locals), in-house licensed civil and mechanical engineers (P.E.), CAD detailers, estimators, project managers, and fabricators. Customer concentration is diversified across major Bay Area health systems, universities (UCSF, SFSU, Sonoma State), technology and life-sciences firms (Agilent, BioMarin, Medtronic, Lawrence Berkeley National Laboratory), wineries (Chandon, Stag's Leap, Hall Wines), and commercial properties. Peterson maintains a private, family-owned capital structure with employee incentives via a 401(k) match and discretionary profit-sharing, no external PE/VC ownership, and consecutive North Bay Business Journal Best Places to Work recognition in 2021, 2022, and 2023.

Name

Peterson Mechanical

Legal name

Peterson Mechanical, Inc

Website

https://petersonmechanical.com

Company type

Private

Founded year

1915

Operating status

Operating

Headcount range

51–100 employees

Short description

Peterson Mechanical is a fourth-generation, family-owned mechanical contractor in Sonoma, California, delivering HVAC, plumbing, process piping, and refrigeration design-build and service across seven San Francisco Bay Area counties for healthcare, education, technology, winery, and commercial clients since 1915.

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), Building Equipment Contractors (2382)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Steam & Air-Conditioning Supply (4961)

akta.pro primary industry

HVAC & Refrigeration Contracting (IMAFALAB)

akta.pro secondary industries

Plumbing & Pipefitting Contracting (IMAFALAC), Industrial/Process Piping & Mechanical Contracting (IMAFALAG), Mechanical Piping, Pumps & Hydronics Maintenance (BPABACAB)

Keywords

• Commercial HVAC services
• Mechanical contracting
• Design-build construction
• Process piping installation
• Commercial refrigeration

Headquarters

HQ city

Sonoma

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, Infrastructure

Revenue model

1. HVAC Services: Installation, repair, and maintenance of heating, ventilation, and air conditioning systems for residential and commercial customers. Operating 24/7 service department.
2. Mechanical Construction: Full-service mechanical construction including HVAC, plumbing, process piping, custom sheet metal fabrication, and commercial refrigeration. Services range from new construction to retrofits.
3. Design-Build Services: In-house engineering taking mechanical portion of projects from pre-planning through start-up and commissioning. Includes design-assist and plan/spec delivery methods.
4. Preconstruction Services: Preconstruction phase services including estimating/budgeting, constructability review using BIM, and value engineering to reduce project costs and improve schedules.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

Peterson Mechanical is a full-service mechanical contractor designing, installing, and maintaining HVAC, plumbing, process piping, medical gas systems, clean rooms, and commercial refrigeration for commercial, residential, and industrial customers throughout the San Francisco Bay Area. Services are delivered via Design-Build, Design-Assist, Plan/Spec, and Preconstruction methods, supported by in-house licensed engineers, BIM-based 3D modeling, and on-site prefabrication of ductwork and piping. A 24/7 service department handles ongoing repair, maintenance, and indoor air quality work for both homeowners and facility operators.

Product overview

Peterson Mechanical operates as a unified service platform providing comprehensive mechanical construction services rather than a modular software product. The company offers an integrated portfolio of services centered around HVAC (heating, ventilation, and air conditioning), plumbing, and refrigeration. Core offerings include Commercial and Residential HVAC Services, Boiler/Chiller/Cooling Tower Repair, Design-Build and Design-Assist delivery methods, Preconstruction Services, and Build Services (including plumbing, hydronic piping, medical gases, process piping, and sheet metal fabrication). Specialized capabilities include Clean Room/HEPA Systems for technology manufacturing and Commercial Refrigeration for wineries and food processing. All services are delivered through in-house licensed engineers, CAD/BIM detailers, and union-trained tradespeople using technologies including 3D CAD, BIM modeling, and prefabrication.

Differentiator

Problem solved

Functional benefit

Products and services

• Commercial HVAC Services Installation, repair, and maintenance of commercial heating, ventilation, and air conditioning systems including packaged rooftop units, VAV systems, chilled water, hydronic heat, and exhaust systems for facilities throughout the Bay Area.
• Residential HVAC Services Installation, repair, and maintenance of home heating and air conditioning systems for homeowners in Sonoma, Marin, and Napa counties, supported by a 24/7 service department.
• Boiler Repair Services Repair and upkeep services for water boilers including tank and tankless systems, ensuring well-functioning hot water systems for residential and commercial applications.
• Chiller Repair Services Installation, repair, replacement, and maintenance of industrial chillers used in HVAC systems, plastic production, food processing, medical facilities, and chemical manufacturing.
• Cooling Tower Repair Services Repair and maintenance services for industrial cooling towers that remove heat from commercial buildings through water circulation and evaporation.
• Design-Build Services Turnkey mechanical systems delivery from pre-planning through start-up and commissioning, including system selection, LEED certification support, energy modeling, and code compliance analysis, with the firm serving as single point of responsibility.
• Design-Assist Services Collaborative design delivery method working with design teams to produce fully coordinated, constructible design documents while identifying value-engineering opportunities.
• Preconstruction Services Early-phase services including estimating/budgeting, constructability review, and value engineering to reduce project costs and improve schedules before construction begins.
• Build Services Mechanical construction execution including HVAC installation, plumbing, hydronic piping, commercial and industrial air conditioning, boilers, pumps, chillers, towers, clean room/HEPA systems, medical gases, process piping, custom sheet metal fabrication, and on-site prefabrication.
• Process Piping & Commercial Plumbing Design, fabrication, and installation of process piping systems including process water, steam, high-purity air, gases, vacuum, fuel, medical gases, boilers, chillers, pumps, tanks, and cooling towers for various facility types.
• Commercial Refrigeration Design and installation of commercial refrigeration systems including constant refrigerant volume DX cooling, heat pumps, dehumidification systems, walk-in freezers and coolers, and winery refrigeration systems.
• Indoor Air Quality Services Solutions for improving indoor air quality through HVAC maintenance, ventilation improvements, air filtration, and humidity control for homes and commercial buildings.

Quantifiable outcome

• Safety EMR rate always below 1
• +2 more outcomes

Named customers25 records

Segments6 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Ten partnerships are on record, tiered core.

• Union Locals 38, 104, 342, 343coreOthersCollaborative relationship with four different unions that provides access to trained tradespeople. Union workforce enables skilled labor availability for large projects and collective bargaining for employee benefits.
• CarriercoreTechnology or IntegrationCompany became a Carrier Authorized Dealer (1970s), enabling sales and service of Carrier HVAC equipment. Partnership provides access to one of the world's leading HVAC manufacturers.
• SMACNA (Sheet Metal and Air Conditioning Contractors' National Association)coreStrategic or Co-development PartnerIndustry association membership providing standards, training, and networking. Les Peterson served as president of SMACNA in 2007, demonstrating leadership in the industry.
• US Green Building CouncilcoreStrategic or Co-development PartnerMembership supporting LEED certification projects. In-house LEED Accredited professionals help clients achieve desired certification levels.
• ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers)coreStrategic or Co-development PartnerIndustry standards organization providing technical guidance for HVAC design and installation.
• MCAA (Mechanical Contractors Association of America)coreStrategic or Co-development PartnerIndustry association representing mechanical contractors.
• IAPMO (International Association of Plumbing and Mechanical Officials)coreStrategic or Co-development PartnerOrganization providing code development and enforcement for plumbing and mechanical systems.
• LCI (Lean Construction Institute)coreStrategic or Co-development PartnerSelected by LCI NorCal for lean company projects. Actively implements lean concepts including 5S, pull planning, and PDCA. Company participated in a 5S project reporting.
• Sheet Metal Workers International AssociationcoreOthersLabor union partnership for sheet metal workers providing skilled workforce.
• United Association of Journeymen and Apprentices of the Plumbing and Pipe Fitting IndustrycoreOthersLabor union partnership for plumbers and pipefitters providing skilled workforce.

Scale indicators3 records

Recent moves8 records

Expansion highlights5 records

Broad incumbents

• APi Group: Publicly-traded provider of safety, specialty, and industrial services including mechanical contracting — broader portfolio but meaningful overlap in mechanical services for commercial and institutional customers.
• EMCOR Group: Large publicly-traded mechanical and electrical services firm with significant commercial, healthcare, and institutional exposure — broader portfolio and geographic reach than Peterson, but overlapping service lines and customer base.

Direct peers

• Marek Brothers Systems: Texas-based but increasingly Western-region mechanical and drywall contractor serving commercial, healthcare, and institutional customers with prefabrication capabilities — comparable trade mix and enterprise project delivery.
• Southland Industries: Privately-held mechanical contractor with design-build, prefabrication, and BIM-driven MEP delivery for healthcare, tech, and commercial customers — closest scale and capability peer to Peterson in the Western U.S.
• ACCO Engineered Systems: Western U.S. mechanical contractor providing HVAC, plumbing, and process systems with in-house engineering and prefabrication; competes directly with Peterson for Bay Area healthcare, lab, and commercial projects.
• Comfort Systems USA: National mechanical contractor focused on HVAC, plumbing, and piping for commercial and industrial customers; comparable in core trade offerings and enterprise project delivery, though operating at much larger scale across multiple regions.
• Limbach Holdings: Publicly-traded specialty mechanical contractor providing HVAC, plumbing, and building services to healthcare, commercial, and institutional customers — directly comparable in scope, customer verticals, and design-build delivery model.

Regional players

• Murray Company: Western U.S. mechanical contractor focused on commercial, healthcare, and industrial projects with design-build and prefabrication capabilities — comparable delivery model and customer verticals.
• Pan-Pacific Mechanical: Northern California-based mechanical contractor specializing in HVAC, plumbing, and process piping for healthcare, biotech, and commercial customers — direct Bay Area overlap with Peterson.

Others

• Carrier Global: Global HVAC equipment OEM and Peterson's authorized dealer partner; comparable through its Trane Technologies / Carrier commercial HVAC installed-base services business, though primarily a manufacturer rather than a contractor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/profile.php
• LinkedInlinkedin.com/company/peterson-mechanical-inc

Compliance12 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 Peterson Mechanical