The phrase "a single mansion" is correct and usable in written English.
You can use it when referring to one specific mansion, often in contrast to multiple mansions or other types of buildings.
Example: "In the heart of the city, there stands a single mansion that has been preserved for over a century."
Alternatives: "one mansion" or "a lone mansion".
He did not take just an average of sales prices, figuring the sale of a single mansion can set that number askew.
Indeed, the tearing down of the institute's picturesque three-house unit had a greater resonance than the felling of a single mansion, as if a whole 19th-century streetscape had been destroyed.
Mr. Goodwin needed only three-fifths of the 50-foot-lot, so he had the architects design what appears to be a single mansion five bays wide, but the eastern two bays are actually a separate house, which he rented out.
In December, Nas appeared in the video for a 2Pac single, "Thugz Mansion (N.Y .," a song of which an alternative version was later released on God's Son, featuring two verses from Nas and only one from 2Pac.
Charged with designing an anachronism, she splices identical portions of a Toll Brothers mansion into a single rendering until she generates "the Buckingham", a symmetrical mess with an oddly fluid interior.
The high-profile property developer – who with his brother, Nick, developed the superluxe One Hyde Park apartment complex for London's oligarchs and is now converting a row of seven houses overlooking Regent's Park into a single 4,600 sq metre London mansion – even named his twins Isabella Monaco Evanthia and Cayman Charles Wolf.
Joseph Lopez, a principal of Fine Times, said that the company planned to renovate and restore the building, but that it had not decided whether to convert it into luxury rentals or condominiums or to sell it as a mansion for a single affluent family.
His idea is simple: create a little house that grows with you over time, allowing a single room to turn into a mansion with a few turns of a wrench.
Ninety-five percent of that forest were cut down by loggers who found a high quality wood that could be used to build a mansion out of a single tree.
With popular Governor Terry Branstad back in the governor's mansion and not a single notable congressional or senate race in the fall, The Hawkeye State will be tough sledding for the president.
A single light at the top of his mansion, a window flaps open.
