Are United States Ambassadorial Residences usually luxury homes and mansions?

Many countries who have embassies in the United States also have Ambassadorial Residences which seem to be usually luxury homes or mansions.
Are most of the official residences of Ambassadors of the United States luxury homes and mansions? I know for a fact some of these are worth in the millions, some almost as [...]

Who are the largest builders of luxury homes throughout the united states?

We are a small co that offers a very high end residential commercial range for luxury homes.
Just looking for some good contacts.