Stevens Square is a HUD Apartment Stevens Square is a HUD Apartment. HUD residents usually pay 30% of their gross income for rent. The rent amount, less approved HUD deductions such as medical and child care expenses, and other allowances, includes a utility allowance. HUD Residents also may choose to pay what is known as flat rent. The HACC works with applicants to determine which rent arrangement is best for them. Stevens Square is a senior low income housing apartment subsidized by the federal governments HUD (Housing and Urban Development Division).