Community Facilities Districts (CFDs) are special districts established by local governments in California as a means of obtaining additional public funding. These districts can be used to pay for ongoing services or authorized public facilities. CFDs may fund public improvements and services including infrastructure by levying a special tax that may be used as the security on which to issue land-secured municipal bonds.

For the critical facilities needs that the Altadena Library District has, a bond is one of the most common ways to address them.