Washington’s Phillips Collection is expanding. “The Phillips has bought an adjoining four-story, 15-unit apartment house on 21st Street NW fashioned in the early 20th century out of two town houses. The museum will keep that building’s cream-colored facade while gutting the interior. The museum bought the apartment house for $1.4 million two years ago, and it has budgeted $20 million for the expansion, a figure that museum officials expect to rise.”