Short answer
By primary use, measured by physical space. A building is eligible only if more than 50 percent of its space, not counting common areas like hallways and restrooms, is used for eligible services, and FEMA then prorates funding to that share. Where the same room serves eligible and ineligible uses, operating time decides it. Each building is evaluated on its own.
<table class="pt-table"><thead><tr><th>Situation</th><th>Rule</th></tr></thead><tbody><tr><td>Several buildings</td><td>Each building is evaluated separately, even on the same grounds</td></tr><tr><td>Mixed-use building</td><td>Eligible only if more than 50% of physical space is for eligible services; common space is excluded; funding is prorated</td></tr><tr><td>Same space used for eligible and ineligible services</td><td>Counts as eligible only if more than 50% of operating time is for eligible services</td></tr><tr><td>PNP owns all and leases part out</td><td>Eligible if more than 50% is dedicated to eligible services</td></tr><tr><td>PNP owns part of the building</td><td>Eligible if it owns more than 50% and more than 50% of space is for eligible services</td></tr><tr><td>Leased to another eligible PNP</td><td>Eligible; the one legally responsible for maintenance applies</td></tr></tbody></table>
Floor plans with square footage by use (excluding common space), schedules showing operating time for shared spaces, IRS documents, pre-incident charter and bylaws, a calendar of activities showing day-to-day use, ownership records, and any leases.
Watch out · Govstar practitioner advice
Exactly 50 percent is not enough; it must be more than half. Measure the space yourself and document the operating schedule for shared rooms. If the eligible share is close, the measurement method decides the outcome.