If a project is already in progress and the applicant is willing to serve the target population(s) and be bound by the service and use requirements, can construction costs already incurred be reimbursed?

No. Funding may not be used for “reimbursement.” Only those costs that can be associated with completing the project (for example, adding an ADA-compliant walkway, widened doorways, etc.) would be eligible costs, per the Welfare and Institutions Code, Section 18999.97: “(c) Subject to an appropriation of funds in the annual Budget Act for the following purposes, the department shall award grants… (1) To preserve or expand capacity of residential adult and senior care facilities through the acquisition, construction, or rehabilitation of property…(g) Funds awarded pursuant to this section shall be used to supplement, and not supplant, other funding available from existing local, state, or federal programs or grants with similar purposes.