A single anonymous gift will finance construction of the three new cooperative house included in the Ten Year Plan for Radcliffe College, an Administration source disclosed yesterday.

The three houses, which will be built opposite Whitman Hall on the present site of Rogers House, will be ready for occupancy a year from September at the earliest.

Although the construction is expected to cost about $400,000 altogether, no final estimate has been made and no ground-breaking date set, according to Frances R. Brown, Dean of Residence. Rogers House will be torn down either this summer or next, however, and construction will take nearly a full academic year, so that the three units should be ready for occupancy in the fall of either 1961 or 1962.

By providing places for 75 students, the new houses will more than double the space now available in cooperative dormitories.

Co-ops Restricted

The Administration expects to continue its present policy of limiting space in cooperative houses to upperclassmen, Dean Brown said. Although the question has not been discussed officially, she explained, "It seems likely" that all freshmen will continue to live in Quadrangle dormitories.

Preliminary drawings for the houses call for three separate units housing 25 each and all placed under the same roof. For reasons of economy, the three units will be heated as one building, but otherwise they will function individually, each having its own kitchen and dining room.