Green and Resilient Retrofit Program (GRRP) for Multifamily Housing

What is the Green and Resilient Retrofit Program?

The Green and Resilient Retrofit Program for Multifamily Housing (GRRP) is designed to promote sustainability, energy efficiency, and climate resilience in multifamily housing properties. It is initiated and overseen by the Department of Housing and Urban Development (HUD) in collaboration with qualified Multifamily Assessment Contractors (MACs) assigned by HUD to work with the Owner and HUD throughout property assessment, Scope of Work development through integrative design, due diligence, Closing, construction, and commissioning and to carry out any or all of HUD’s roles as described in the GRRP Notice H 2023-05 on behalf of HUD.

Learn more about how AEI can support your GRRP Projects.

The goal of the GRRP is to improve the environmental performance and resilience of existing multifamily housing developments across the country. You can learn more about the preferential areas for the GRRP program at these links: and

By retrofitting these properties, the program aims to reduce energy consumption, lower greenhouse gas emissions, enhance climate resilience, and create healthier living environments for residents.

Through the GRRP, HUD provides funding and support to property owners and developers who wish to undertake retrofit projects to improve their multifamily housing properties. The program emphasizes comprehensive assessments, integrative design, and the use of innovative green technologies and practices to achieve sustainable and resilient outcomes.

The GRRP provides a framework and resources for transforming multifamily housing properties into greener, more resilient communities that benefit both residents and the environment.

AEI Services that Support Green and Resilient Retrofit Program Projects

As an experienced HUD consulting firm, AEI’s dedicated HUD Technical Due Diligence Team is well-equipped to provide qualified assistance for your GRRP Cohort, Multifamily Assessment Contractors (MACs) and Comprehensive Awards.

Our team at AEI offers a comprehensive range of services to fulfill the requirements, including a full suite of assessments:

Capital Needs Assessment (CNA)

We assess the capital requirements of your multifamily property, enabling you to plan for long-term sustainability and maintenance.

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Environmental Assessments (Phase I & II)

Our experts conduct thorough environmental assessments to ensure compliance with environmental regulations and identify any potential risks.

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Energy Audits (ASHRAE Level 1, 2 & 3)

We perform detailed energy audits to evaluate the energy efficiency of your property and identify opportunities for energy savings.

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Renewable Energy Services

AEI evaluates the feasibility and potential benefits of incorporating renewable energy sources into your multifamily property, helping you reduce your carbon footprint.

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Natural Hazard & Climate Resilience Assessments

We assess the vulnerability of your property to natural hazards and climate-related risks and provide strategies to enhance its resilience against future challenges.

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AEI’s other HUD-required services to support your project:

Radon Assessments

Radon assessments help identify the presence of this naturally occurring radioactive gas and whether mitigation is necessary.

HAZMAT Screening

HAZMAT Screening is done to detect and manage hazardous materials. This will help ensure the safety and well-being of the property occupants.

Construction Monitoring

Construction monitoring is done to oversee and ensure the quality and compliance of construction activities during the the construction process.

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AEC (Architecture, Engineering, and Construction)

AEC (Architecture, Engineering, and Construction) cost estimates and plan reviews to assist with budgeting and ensure adherence to HUD guidelines.

To learn more about how AEI can support your GRRP project and provide HUD consulting services, please reach out to one of our technical leads:

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Staige Miller

Senior VP
HUD Environmental Serivces

Jeb Bonnett

Senior VP
HUD Building Assessments

Matthew Snow

Vice President
HUD Energy & Sustainability

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