I would say not, but the answer may depend on exactly what you mean by "fixing up".
The White House had seen 11 president before Fillmore and most of them and their wives made some beneficial changes. For example, Jackson got running water put in. Mrs. Fillmore is noted for getting Congress to put up some money for a permanent book collection in the White House,
Mrs. Millard Fillmore (Abigail Fillmore) got Congress to buy books for the first permanent White House library.
Millard Fillmore is reported to have had the first cook stove installed in the White House. Supposedly Fillmore had to teach the White House cook, who had never seen a cook stove, how to use one. When Tyler was president, a furnace ,which might be considered to be a kind of stove, was put in some tne years before the cook stove.
Millard Fillmore reportedly had the first cookstove brought in.
The White House Library was created while Millard Fillmore was in office. His wife, Abigail Fillmore, led the push for a White House Library.
Abigail Powers Fillmore, wife of the the President Millard Fillmore, got Congress to appropriate money to start a library in the White House.
His first wife was Abigail Powers Fillmore. She was responsible for getting a library established in the White House. His second wife was Caroline McIntosh Fillmore.
President Herbert Hoover first conceived of using the room as a library in 1935. Mrs. Millard Fillmore was the one who pushed Congress to pay for a permanent White House book collection.
The first White House library was created at the insistence of Mrs. Fillmore. (There is a false story, begun by H. L. Mencken, that Fillmore had the first White House bath tub put in. See the related question.)
The White House library was begun at the request of his wife. He may have had the first kitchen range added to the white house. H. L. Mencken published a story, later admitted to be a hoax, that Fillmore had the first bathtub put into the White House,
May of 1937 by Millard Fillmore.
Millard Fillmore, at the request of his wife, got Congress to appropriate some money to buy books for a permanent White House library. He did not install a bathtub-- please see the related question.
May of 1937 by Millard Fillmore.