Abstract: The repair flange comprises of but not restricted to two parts of thin rigid flat sheet material which are structured so that they can be flush mounted over finish floor material. The repair flange is provided with a circular opening on the parts whereby the parts form a complete circle surrounding the neck under the attachment rim of a closet flange. The circular opening fits closely around the neck of the closet flange and the body of the flange extends over the floor surface beyond the area covered by the base of rim of the closet flange. This provides for attachment or fastening through the base of the closet flange and to floor material situated outside the base of the closet flange. The repair flange ties in a larger area of floor material into the anchoring of the closet flange to the floor surface.