The ADU Program currently maintains a listing of lenders/banks that provide financing for ADUs. This list can be found online here. This is not an exclusive list but if you want to use a lender not found on the list above, you must receive approval from your lender’s underwriters that they will provide financing for an ADU.
Please be aware that Pre-Approval letters and Pre-Qualification letters are not the same thing. Only Pre-Approval Letters are accepted by the ADU Program.