By Cristian Kreckler
Section 179D of the Internal Revenue Code provides a federal tax deduction tied to energy-efficient commercial building property. Following updates introduced through the Inflation Reduction Act, interest in the provision has expanded among commercial building owners, architects, engineers, designers, and public-sector stakeholders seeking to better understand the relationship between energy performance and federal tax incentives.
As awareness of Section 179D has grown, so has the number of firms offering consulting, engineering, and documentation services related to the deduction. These firms differ in structure, technical resources, staffing models, and service integration. For organizations evaluating third-party support, understanding those operational differences can help inform due diligence and project planning.
This article provides a general overview of several firms operating within the 179D consulting landscape and highlights some of the considerations organizations may review when evaluating service providers in this space.
The Expanding 179D Consulting Landscape
Section 179D projects typically involve a combination of:
Energy modeling
Engineering analysis
Tax documentation
Coordination with building stakeholders
Compliance-related reporting
Because of the technical nature of the work, many organizations seek outside support from firms that specialize in energy efficiency incentives and related consulting services.
Approaches can vary considerably between providers. Some firms emphasize engineering resources and in-house modeling capabilities, while others position 179D within broader tax advisory or sustainability consulting practices.
Examples of Firms Operating in the 179D Sector
KBKG
KBKG (https://www.kbkg.com/179d ) is a national tax advisory firm with experience in energy-related tax incentives, including Section 179D. The firm states that it operates an integrated service model that includes tax professionals, licensed engineers, energy modelers, and government relations support.
According to publicly available information, KBKG performs its energy modeling and engineering analysis domestically through internal teams. The firm also references experience supporting projects involving allocation letters and government-owned buildings.
Areas referenced within the firm’s publicly available materials include:
Integrated engineering and tax coordination
In-house energy modeling resources
Government and public-sector project support
Energy efficiency incentive consulting
Walker Blue
Walker Blue operates within the engineering and specialty tax consulting space, offering services connected to construction, energy efficiency, and tax incentives, including Section 179D studies.
The firm’s approach appears to focus on technical analysis, engineering support, and documentation associated with commercial real estate and construction-related projects.
Publicly referenced service areas include:
Engineering-focused consulting
Construction and real estate project support
Energy performance documentation
Technical compliance services
Leyton
Leyton is an international consulting firm with operations across North America and Europe. The company is known for work related to research and development tax credits, grants, and business incentives, including energy efficiency-related services.
Within the United States, Leyton includes Section 179D consulting as part of a broader incentives and sustainability practice.
Areas referenced in publicly available information include:
Tax incentive consulting
Sustainability-related services
R&D and innovation advisory
Energy efficiency incentive support
Considerations When Evaluating a 179D Consulting Firm
Because Section 179D projects often involve multiple disciplines, organizations may benefit from reviewing how a provider structures its services before engagement.
How Is Technical Work Managed?
Organizations may wish to understand:
whether energy modeling is handled internally or outsourced,
whether licensed engineers are directly involved,
and how technical documentation is reviewed and validated.
What Does the Engagement Process Involve?
Firms may approach projects differently depending on:
building type,
ownership structure,
jurisdiction,
and project scope.
Requesting a general overview of the process — including data collection, modeling, documentation, and stakeholder coordination — can help establish expectations early in the engagement.
How Are Allocation Letters Coordinated?
For projects involving government-owned buildings, allocation letter coordination can be an important administrative component of the process. Organizations may wish to clarify how firms assist with documentation and stakeholder communication in these cases.
Can Firms Provide Relevant Project Experience?
While outcomes should never be assumed or guaranteed, firms may be able to provide examples of prior project experience, building types evaluated, or industries served.
The Evolving Role of Energy Incentive Consulting
As energy efficiency standards, sustainability initiatives, and federal tax incentives continue evolving, consulting firms operating in the Section 179D space are expanding their technical and advisory capabilities.
For organizations evaluating providers, factors such as engineering resources, service integration, project coordination, and documentation processes may all play a role in determining operational fit.
Understanding how firms structure and deliver these services can help stakeholders make more informed decisions when navigating energy-efficiency-related tax compliance requirements.
Disclaimer: This article is provided for informational purposes only and does not constitute tax, legal, financial, or investment advice. The firms referenced are included as examples of organizations operating within the Section 179D consulting sector based on publicly available information at the time of writing. References to specific firms do not constitute endorsements, recommendations, rankings, or certifications by the publication or author. Readers should conduct independent due diligence and consult qualified professionals regarding their specific circumstances.
