Legence - Homepage

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Solar panels on a building rooftop
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We're a legion of companies committed to making the spaces we occupy healthier and more sustainable.

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Legence is an Energy Transition Accelerator™. Our team radically improves the performance of the built environment. We’re fostering the future by championing building efficiency today.


Since 1914, our teams have delivered results at the intersection of engineering, technology, and sustainability.

  • ESG / SQ FT

    1.5 B+

    As an ESG advisor, Legence is maximizing the efficiency of more than 1.5 billion square feet across 5,000+ buildings.


    10 M+

    Legence has undertaken 10 million square feet of net zero energy design and implemented more than 100 MW of renewable generation


    $ 10 B+

    Our community engagement and technical expertise has generated over $10 billion in energy and infrastructure projects.



    We’ve completed a broad range of LEED-certified projects for our clients. LEED certifications are among the most respected marks of sustainability a building can earn.


    5 K+

    Legence is 5,000+ engineers, professionals, and craftspeople strong.


    50 +

    Headquartered in San Jose, CA, Legence operates more than 50 offices across the US.


Uniquely equipped for any challenge.

Legence offers an integrated approach to drive building performance, decrease costs, and overcome any project challenge.


Uniquely equipped for any challenge.

Legence offers an integrated approach to drive building performance, decrease costs, and overcome any project challenge.

Two business people discussing a project in an office

The leading sustainability advisory practice nationwide; our interdisciplinary team of 150+ sustainability consultants and renewable energy specialists deliver customized and technology-enabled solutions that unlock value, fulfill investment objectives, and decarbonize the built environment.

  • Sustainability Program Strategy
  • Design + Implementation
  • Governmental + NGO Climate Programs
  • Carbon + Energy Solutions
  • Climate Risk Assessment, Mitigation + Disclosure
  • Data Management + Analytics
  • Compliance + Reporting
  • Stakeholder Engagement
  • Marketing + Communications
  • Green Building Certifications
  • On-Site Renewables, Strategy, and Procurement
Two workers installing solar panels

Legence’s 1000+ specialized engineers are driven by a singular focus: crafting innovative solutions that redefine building performance. From pioneering new methods of measuring indoor air quality to creating custom energy dashboards, their ingenuity knows no bounds. They invent groundbreaking products, set national standards, and reshape deeply-held beliefs about what's achievable in sustainable building design. Legence is at the forefront of the MEP industry, rewriting the rules of high-performance MEP design, one innovative project at a time.

  • Zero Energy Engineering
  • Decarbonization Consulting
  • Mechanical Engineering
  • Electrical Engineering
  • Plumbing Engineering
  • Fire Protection Engineering
  • Technology and Security Design
  • Lighting Design
  • Commissioning
  • Retro-Commissioning

Legence provides a fully-integrated approach to comprehensive facility planning, funding, design, and construction implementation for complex public and private sector projects. We optimize all project-related professional services while enhancing overall quality control and project outcomes. Our team of over 140 industry professionals provides single-source accountability for our clients while ensuring project continuity from initial conception through completion.

  • Facilities Assessment and Physical Needs Analysis
  • Capital Improvement and Long-Range Planning
  • Space Utilization and Programming
  • Community Engagement
  • Referendum Planning
  • Strategic Communications
  • Comprehensive Funding Solutions
  • Construction Management
  • Commissioning and Re-Commissioning
  • Energy Audits and Utility Analysis Services
  • Long-Term Facilities Maintenance
  • Asset Management
HVAC piping system in a smart building

Energy Performance Contracting is the perfect solution for our clients who want to upgrade their facilities without impacting their budgets. Whether they lack the funds for renovations, need to tackle deferred maintenance, or simply want to improve efficiency, we can help. We have deep experience as a design-build partner for high-performance and net zero energy structures, rethinking efficiency, technology, and infrastructure for cutting-edge projects. We don't just build; we build for the future.

  • High Performance & Net Zero Energy Design
  • Energy & Building Retrofits
  • Building Automation Controls
  • Commissioning & Building Optimization

At Legence, our experienced MEP craftspeople are more than just skilled technicians – they are the architects of high-performance and mission-critical facilities. We don't just design, install, and maintain complex MEP systems – we master them. We believe that safety is paramount. In fact, we strive for the only acceptable goal: zero incidents. We create facilities that are not only safe and healthy but also energy-efficient and performing optimally. We believe that when our clients choose Legence, they choose more than just a contractor – they choose a partner in creating environments that thrive.

  • Design Build Engineering Services
  • Building Information Modeling (BIM)
  • HVAC Construction
  • Plumbing Construction
  • Process Piping Construction
  • Electrical Construction
  • Fire Protection Construction
  • Architectural Sheet Metal
  • Test Adjusting + Balance
  • Building Automation Solutions (BAS)

For decades, our employees have been working onsite with our customers, ensuring them that their mission-critical facilities will always be up and running. Our full-time, trained technicians are on site day or night, to provide integrated services that support our client's specific site requirements. We provide expertise and support as facilities require continuous maintenance and service in addition to frequent retrofitting / replacement as operations evolve.

  • 24/7 Emergency Service + Repair
  • Proactive + Preventive Maintenance
  • HVAC, Plumbing, + Process Piping Construction
  • BAS + Industrial Controls Support
A worker installs air conditioning

Legence is a trusted mechanical, electrical, and plumbing (MEP) and facilities partner for our clients. We provide integrated facility services to unlock performance and optimize building systems. Our experts are available at all hours, ready to respond, and provide unmatched communication and performance to ensure systems keep running. We provide Proactive & Preventative Maintenance services and 24/7 emergency HVAC, plumbing and electrical break-fix services essential to avoid facility failure or business interruption.

  • Comprehensive Maintenance Programs
  • Chiller + Boiler Services
  • MEP Equipment Replacement + Retrofit
  • Energy Benchmarking
  • O+M Budgets
  • Plumbing Services
  • Fire Protection Services

Legence is an industry leading full-service fabricator, supplying high-quality, customized complete systems to our clients. Our unmatched fabrication capabilities cover a wide range of designs, sizes, and material grades designed to meet any variation of project specifications. Legence’s state-of-the-art machinery and advanced fabrication software, paired with our expert designers and technicians ensures quality and reliability like no other company. Legence specializes in the design and fabrication of process systems for a wide range of industries. We commit to supplying practical, proven designs with long-term success.

  • Validated Turn-key Process Systems
  • High Purity Chemical Processing Systems
  • Water + Wastewater Treatment Systems
  • Electrical & Control Panel Design + Fabrication
  • Sheet Metal + Plumbing Fabrication
  • Historical Restorations, Sculptures, + Monuments

Powered by a family of class-leading providers, working for the greater good.

  • A.O. Reed & Co.

    Mechanical contractor built on excellence, integrity, customer satisfaction, and top-quality expertise. Since 1914, A.O. Reed has built and serviced memorable projects throughout Southern California with cost-effective budgets and exceptional service while maintaining aggressive schedules.

  • Bel-Aire Mechanical

    A sector innovator with 35 years of experience, Bel-Aire Mechanical is Arizona’s largest mechanical and plumbing contractor.

  • Black Bear Energy

    An authority in solar, Black Bear works with property owners looking to develop and implement clean energy infrastructure.

  • CMTA

    Experts in high-performance, sustainable projects, CMTA provides best-in-class consulting engineering and energy performance contracting services to its clients.

  • Gilbert

    Gilbert provides mechanical, electrical, plumbing, controls, and fire protection for a diverse range of clients in the Midwestern US.

  • ICS

    A leader in the construction program management industry, ICS offers customized services that unite all phases of a project’s life cycle—from planning and funding, to construction and ongoing operation support.

  • Provident Energy Consulting

    Leveraging 25+ years of utilities experience, Provident develops innovative energy strategies for clients across the U.S.

  • RE Tech Advisors

    A proven sustainability advisor for the investment community, RE Tech Advisors provides data-driven insight, strategy, and engineering support to design and implement ESG programs.

  • SC Engineers

    Founded in 2004, SC Engineers is an industry leader in mechanical, electrical, and plumbing planning and design, energy efficiency, building automation, and total building commissioning. SC Engineers delivers innovative solutions with a dedicated focus on decarbonization, resulting in highly-efficient facilities.

  • Therma

    A leader in HVAC, fabrication, and building automation, Therma is among California’s most capable full-service mechanical solution providers.

  • VarcoMac

    VarcoMac has been the leading electrical services provider in the Baltimore-Washington Metro Area for 40 years.

  • Yearout

    More than half a century of experience establishes Yearout as the leading full-service mechanical solutions provider in the New Mexico market.

Our Locations

Local approach, from coast to coast.

We operate over 50 offices across the US, supporting innovation and sustainability nationwide.

A map of Legence locations across the United States. Legence has nearly 50 offices and truly nationwide reach.

What you do here will make a difference.

Interested in joining us? Every member of the Legence team plays a key part in creating a more sustainable world. And we have a lot of fun doing it, too.

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