Virginia residents have Jan. 31 to file for refunds for illegal rent increases four years ago at several federally subsidized housing projects.

The refunds, which average $500 each, are part of a $60 million settlement agreed to by the U.S. Department of Housing and Urban Development Department as the result of a class-action suit filed on behalf of an estimated 500,000 tenants in 5,000 projects across the nation.

Persons who lived in HUD section 236 housing between Feb. 1, 1975 and Sept. 30, 1977, may be eligible for the refunds.

Tenants in 14,330 units in Virginia were overcharged. By last week, only 12 percent of those eligible had applied for the rebates.

Claim forms can be obtained from Section 236 project managers or by calling the toll-free number, 800-824-7980.

Persons who lived in the following projects between Feb. 1, 1975 and Sept. 30, 1977 may be eligible:

Arlington -- Culpeper Gardens

Alexander -- Cameron Overlook, Landmark Apartments, Old Town West (Phase I), Pendleton Park Apartments.

Fairfax City -- Suburbia Fairfax Apartments.

Fairfax County -- Buckman Road Apartments, Chantilly Pines (Herndon Gardens), Elden Terrace, Fellowship House -- Section II, Lane Anne, Fox Mill Apartments, Hybia Valley Apartments, Lakeview, Laurel Glade Apartments, Reflection Lake I, Tysons Towers, Wexford Manor Apartments, Woodlawn Village, Section 2.