blue circle white light bulbGRRP Leading Edge

The Green and Resilient Retrofit Program (“GRRP”) Leading Edge cohort supports owners in achieving an industry-leading net zero energy or net zero carbon building certification. To learn more view the webinar below which provides an overview.  


Leading Edge Application Extension. Due to maintenance, the site will be down from October 28 -31. Because of this issue, HUD is extending the deadline for Leading Edge Round II applications to November 6.

Leading Edge Cohort Awarded. On October 19, 2023, HUD announced the first round of Leading Edge awards for the application round that closed on July 31, 2023. See HUD’s Press Release for more detail.


GRRP Overview: Leading Edge, edited 11/17/2023 (Video, 9 mins)

We hosted a live webinar on the full scope of GRRP.
View the video on HUD's YouTube Channel here. The slide presentation is also available here.

To learn more about program requirements 

Ask us your questions directly during our GRRP Office hours!

Join us Wednesdays from 3:00-3:30 PM EST (no registration necessary):
Office Hours recordings are now available on HUD's YouTube channel:
May 24May 31June 7June 14June 21June 28July 12July 19July 26August 2August 9, August 16, August 23, August 30, September 6, September 13, September 20, September 27, October 4, October 11, October 18.  


For more information on GRRP view the brochure here.



Applicant Tools & Resources*


NEW! September 18, 2023. The GRRP applications have been updated with the changes listed below. The updated Leading Edge application is now available.  

All Applications

  1. Updated the “program assisted under” dropdown to present a more streamlined set of choices (Section 8 PBRA, Section 202, Section 811, Section 236, Other)
  2. Fixed an issue where applicants who entered a Zip Code with a leading zero received an error message and were unable to input their Zip code.
  3. Changed the size of the tooltip on the Census Tract look up, so applicants can see the full tool tip and access the link to the site to look up the correct Zip Code.
  4. Fixed an issue where Census Tracts with a leading zero were unable to be entered.
  5. Fixed leading zero errors in iREMs and Assistance Contract # cells (we have not received reports of errors for these yet, this change is proactive).



  • Grants.govAdditional application materials are posted and must be submitted through
  • The Multifamily Building Efficiency Screening Tool (MBEST). (Updated 8/28/2023) All owners applying to the Leading Edge cohort must complete the MBEST. This tool was created in partnership with the U.S. Department of Energy and the Lawrence Berkeley National Laboratory to screen multifamily buildings and understand current opportunities for energy efficiency improvements. Completing the MBEST will require owners to walk through their building and enter information about lighting, HVAC heating/cooling systems, domestic hot water systems, and the building envelope. For more information on how to fill out the tool, view the Overview video. 



Learn more about GRRP Cohorts



*GRRP Leading Edge application tools are part of the Paperwork Reduction Act (PRA) collection under OMB control number 2502-0624. Public reporting burden for this collection of information is estimated to average 45 minutes per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Comments regarding the accuracy of this burden estimate and any suggestions for reducing this burden can be sent to the Reports Management Officer, REE, Department of Housing and Urban Development, 451 7th St SW, Room 4176, Washington, DC 20410-5000.  When providing comments, please refer to OMB Approval No. 2502-0624. This information is required to obtain benefits. HUD may not collect this information, and you are not required to complete this form, unless it displays a currently valid OMB control number. This information is being collected under Title III of the Inflation Reduction Act of 2022, H.R. 5376 (IRA), section 30002 titled “Improving Energy Efficiency or Water Efficiency or Climate Resilience of Affordable Housing,” authorizes the Green and Resilient Retrofit Program (GRRP). The program provides grants or loans for building retrofits to HUD-assisted multifamily projects with utility efficiency or climate resilience needs. The Leading Edge cohort of the program targets properties currently undergoing a recapitalization or other transaction with HUD and offers owners a menu of net zero building standards for reimbursement. This information collection is used to determine eligibility of HUD-assisted multifamily properties for participation in the GRRP Leading Edge program and the terms on which participation should occur. The purpose of the program is to fund projects that improve energy or water efficiency, enhance indoor air quality or sustainability, implement the use of zero-emission electricity generation, low-emission building materials or processes, energy storage, or building electrification strategies, or address climate resilience, of an eligible property. While no assurances of confidentiality are pledged to respondents, HUD generally discloses this data only in response to a Freedom of Information Act request.