
About Us
Who Are We?
PEG, LLC is in its 23rd year as a diverse energy efficiency, engineering, environmental, and management consulting firm operating principally in the Eastern and Central United States. PEG specializes in building energy performance, green building program compliance, building diagnostics, environmental and code compliance, thermal performance, HVAC design and operation, and construction defect. These capabilities have enabled PEG to become a leader in the application of national green building standards and demand side energy efficiency protocols. PEG is also proud to be a SWAM certified small woman and minority owned business!
What We Do?
Operating as a design consultant and “boots on the ground” interim and continuous inspection agent, PEG leads the way in verification of effective planning and real-world application of all aspects of sustainable construction. PEG performs at every level of contracting from commercial structures to residential dwellings to charitable endeavors.
Contact Information:
Matthew Cooper
3975 Fair Ridge Drive, Suite T15S
Fairfax, VA 22033
Phone 703.934.2777
Send us a message
Service Areas
Our Service Areas Include:
Our Products


MEP Design That Works
Communicating your vision. We strive to make efficient, cost effective design decisions and believe in the concept of mutually beneficial relationships with our clients. Our goal is to become a long-term business asset with every client.


Turnkey HVAC Design Programs Built For Your Organization
HVAC designed for you. We offer direct Senior Management involvement in all our designs programs. Senior Management involvement in design ensures that our clients directly benefit from our years of experience and knowledge of what works and what does not work. Cost effective design begins with the application of decades of lessons learned, with a key focus on reduced warranty issues, customer comfort complaints and cost savings for our clients. All PEG HVAC Designs are performed using the ACCA and ASHRAE industry Standards.


Turn-Key Energy Programs
Options designed for you. PEG offers all available energy efficiency solutions, enabling us to find the one that will best suit your companies’ goals for the energy efficient modern built environment. Whether you seek code compliance consultation and testing, RESNET HERS Program solutions and execution or ENERGY STAR certification, PEG has the answer to your energy efficient needs.


Award Winning Expertise in Green Building Programs
Focusing on perfection. As a leader in the Green Building Program industry, PEG can provide your Green Building project expert consultation and evaluation from inception to field execution and certification. As a national participant in all major Green Building programs across the United States, PEG has a depth and breadth of experience like no other company in our industry.


Third-Party Inspection Services
Providing you the tools to succeed. PEG provides Built Environment Inspection services for Commercial, Institutional and Residential communities and buildings. Built environment professionals rely on PEG to protect their valuable investments and solve problems at all phases of the construction process.


