Historic Properties Mitigation Bank (HPMB)
Grant Program
Supporting the preservation of Idaho’s historic places with up to $50,000 per award.
Preservation Idaho is now accepting applications for the Historic Properties Mitigation Bank (HPMB) Grant Program, a competitive funding opportunity designed to support historic preservation projects throughout Idaho. The program is funded through Idaho’s Leading Idaho Local Bridge (LILB) Program to mitigate adverse effects on historic properties caused by infrastructure development. Preservation Idaho administers the HPMB in partnership with the Idaho State Historic Preservation Office (SHPO) and the Local Highway Technical Assistance Council (LHTAC).
Funding Categories
Type 1 – General Preservation Projects
Eligible projects include:
Historic resource surveys
National Register nominations
Preservation plans and reports
Brick-and-mortar rehabilitation
Thematic studies and historic contexts
Design guidelines
Historic structures reports
Maximum Award: $50,000
Type 2 – Historic Bridge Projects
Eligible projects include:
Rehabilitation or repair of NRHP-listed or eligible bridges
Relocation of historic bridges
Maximum Award: $50,000
Important Dates — Applications are open!
Application Deadline: May 1, 2026 (midnight)
Award Notifications: By July 15, 2026
For questions, contact: Mary Scott (marys@preservationidaho.org)
Ineligible Projects
Funding cannot be used for:
New construction
Completed projects
Interpretive displays or documentaries
General operating support
Publications
Site operations
Historic Properties Mitigation Bank (HPMB) Grant Program – FAQ
What is the HPMB Grant Program?
The Historic Properties Mitigation Bank (HPMB) Grant Program provides funding to support historic preservation projects in Idaho. The program helps mitigate adverse effects to historic properties caused by infrastructure development through Idaho’s Leading Idaho Local Bridge (LILB) Program.
Who administers the program?
Preservation Idaho administers the HPMB Grant Program in partnership with the Idaho State Historic Preservation Office (SHPO) and the Local Highway Technical Assistance Council (LHTAC).
How much funding is available?
Up to $50,000 per award is available for both General Preservation Projects and Historic Bridge Projects.
What types of projects are eligible?
Type 1 – General Preservation Projects:
• Historic resource surveys
• National Register nominations
• Preservation plans and reports
• Rehabilitation work
• Thematic studies
• Design guidelines
• Historic structures reports
Type 2 – Historic Bridge Projects:
• Rehabilitation or repair of NRHP-listed or eligible bridges
• Relocation of historic bridges
What projects are not eligible?
Funding cannot be used for:
• New construction
• Completed projects
• Interpretive displays
• Documentaries
• General operating support
• Publications
• Site operations
Who can apply?
Eligible applicants typically include local governments, nonprofit organizations, preservation groups, and other entities involved in historic preservation in Idaho.
When is the application deadline?
Applications must be submitted by midnight on April 15, 2026.
When will applicants be notified?
All applicants will be notified by July 15, 2026, regardless of award status.
How are applications reviewed?
Complete applications are first reviewed by the Idaho SHPO for a 30-day technical evaluation. The Grant Committee then reviews applications and determines awards.
What is the Grant Committee?
The Grant Committee includes representatives from:
• Federal and/or State agencies
• LHTAC
• Preservation Idaho
• SHPO
• A Certified Local Government (CLG)
• Cultural resource professionals
What happens if my project is selected?
Successful applicants must complete a Grant Agreement within 60 days of notification.
How do I apply?
Questions: Mary Scott (marys@preservationidaho.org)