Hello there!


Chicago based building design consultants



Our forte is Mechanical, Electrical and Plumbing solutions



Our experience will be a great asset to your team


Who We Are The who, what and why our company exists

At LEHMAN DESIGN CONSULTANTS, the mission is to creatively and reliably contribute to Architecture while maintaining a high level of professional and personal involvement. The firm has extensive experience designing HVAC, Plumbing and Electrical systems. At our core resides fortes in imaginative and economical solutions tailored to the particular needs of our clients. We exemplify Team and will put forth the effort to be the best.

We Innovate Solutions

Not just engineering, we design with the architecture. We use the constraints as more than simple boundaries. Our goal is to design the best system that addresses the Client’s needs without extraneous elements.

We Design Great Systems

The whole system should be more than the sum of its components. At LDC, our team takes pride in understanding how the system should perform and executing a synergistic design.

We're Passionate

We work hard and it shows. We go the extra mile for our Clients every opportunity we get.

Awesome Support

Our Construction Administration is second to no one. We provide timely responses to RFI’s, Submittals and Punchlists.

Meet Our Team

Each individual plays a great role in the development of our company. All their contributions are more worth than gold making them an invaluable asset to the company.

L. Anthony Navarro - PE

Partner, Engineer of Record

Anthony joined LDC in 2005 and holds a PE license in six states; he has been the managing Professional Engineer since 2010. Anthony has a diverse background in MEP engineering, the permitting process and LEED Certification. His engineering philosophy follows Louis Sullivan when he wrote “form ever follows function”. While always striving to engineer the most efficient systems, Anthony understands that there is such thing as a budget and if the design is too expensive then it simply will never be built.

David A. Lehman - R.A, CPD


David Lehman’s professional career dates to 1979 and includes five years with H. S. NACHMAN and ASSOCIATES and over twelve years with GAMZE, KOROBKIN CALOGER, Inc. He has extensive experience with all types of Mechanical, Electrical, Plumbing and Fire Protection systems for a wide variety of single and mixed use projects. David brings a “nuts and bolts” practical approach with sensitivity to architectural and owner program requirements. His budget estimates of MEPFP systems reflect accuracy commensurate with his experience. Energy audits and cost/benefit analysis prepared by David are rooted not only scientific theory, but also extensive empirical data.

Gregory M. Burch

Chief Electrical Designer

Gregory Burch joined LEHMAN DESIGN CONSULTANTS, INC. in July of 1997 as Chief of Electrical Design.

Gregory’s professional career dates to September of 1987 and includes several years each with C. F. Murphy and Associates, J. J. Majon Consultants and Gamze Korobkin Caloger, Inc. He has extensive experience with all types of Electrical (power distribution and lighting), Life Safety and Telecommunication systems for a wide variety of single and mixed use projects. Greg’s practical approach to electrical systems design makes him a leader in his field

15 LEED Certified Projects
19 Years in Business
30 Clients
1500 Projects

Our Services From HVAC to Feasibility Studies, we love what we do and we promise to give you the best!

Mechanical Engineering Consulting

HVAC systems design, retrofits and efficiency upgrades, permitting and troubleshooting.

Electrical Engineering Consulting

Power, distribution, lighting, life safety and communication systems design and permitting.

Plumbing Engineering Consulting

System design, domestic water heating plants and water use reduction.

Energy Modeling

Computer energy simulations to evaluate designs, ASHRAE 90.1 Appendix G modeling.

Energy Audits and Feasibility Studies

Evaluate existing systems and provide reports discussing improvement options and potential payback periods.

Energy Commissioning and LEED Consulting

Experienced with the LEED process and corresponding with the USGBC.

Fire Alarm/Sprinkler Design Assistance

Specifications and drawings for Design Assist with fire protection and life safety systems.

Our Work Check out our recent projects and we’re sure you’ll be impressed.

The Morgan
Holocaust Museum
The Gateway
Flair Tower

So you're convinced that LDC is the best?

Get in Touch Feel free to contact us if you have something to say!