HUD, through its Department of Energy Better Buildings Challenge, has a resource library for financing renewable energy and energy efficiency.
Financing Navigator financing options to consider and compare. Options include traditional financing (leases and loans) and specialized financing (on-bill, property assessed clean energy and savings-backed arrangements).
Database of State Incentives for Renewables and Efficiency information on incentives and policies that support renewable and energy efficiency in the US.
Enterprise Property Retrofit Financial Decision Tree financing strategies to secure funding for retrofit upgrades. Enterprise also has a Step-By-Step Retrofit Process guidebook.