Answer:
Mrs. Mingott’s home is not as old as other homes in the city.
Step-by-step explanation:
The description of Mrs. Mingott's home is that of a stately house built with a lot of furnishings. However, the passage recognized that the building was not as venerable or impressive as the other buildings in the city.
But it was mentioned that many of the buildings will go out of fashion before Mrs. Mingott's house. Some of them described were "the quarries, the one-storied salons, and the wooden green houses". This information from the first paragraph leads to the conclusion that Mrs. Mingott's home was not as old as other homes in the city.