Virginia's Trusted Energy Code Compliance
and Green Building Certification Experts

Energy Diagnostics is dedicated to improving the efficiency, environmental impact, and comfort of single and multifamily residential buildings throughout Virginia.

For more than 30 years we have helped optimize building performance by providing energy code compliance, testing, and certification services. We draw on our experience of working on thousands of projects throughout the country to provide customized solutions for your project's specific energy efficiency needs. Our comprehensive scope of services helps building professionals ensure their project meets or exceeds energy efficiency thresholds. 

If it has to do with energy code and performance, we are here to help. Let’s build something great together.

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Energy Diagnostics is a nationally recognized energy rating company providing comprehensive solutions to achieve energy code compliance with ease. Our services provide builders with the tools to design and construct high-performing buildings while ensuring that homeowners benefit from cost-savings, greater comfort, and improved air quality. We also provide evaluations on a home’s energy performance to determine if it qualifies for a 45L tax credit.


Our team of green building experts provides consultations, inspections, testing, and third-party verification for single and multifamily residential projects.

With extensive experience in above-code requirements for LIHTC and QAP-funded projects, we help developers navigate the green building certification requirements of a multitude of above-code programs, such as:

Our ACCA-accredited HVAC designers are capable of performing Manual J, D, S, and N load calculations to ensure your next project’s HVAC systems is sized and ducted properly for maximum efficiency.

Experts in traditional and Rheia duct design, we offer preliminary design services, energy modeling, cost engineering, and expert guidance to HVAC installers, builders, and developers.  


The 45L tax credit incentivizes builders, developers, and contractors to design and construct energy-efficient homes.  IRS Code Section 45L provides up to $5,000 in Federal tax credits for each qualifying housing unit.

Energy Diagnostics has an extensive staff of RESNET accredited certifiers and energy modelers prepared to perform on-site inspection and verification services to determine if your property qualifies for the 45L tax credit. Contact us today to see if your project qualifies for $2,000-$5,000 per unit in energy-efficient tax credits.

Let's Build Something Great Together