Cotran's project in 2007, Mr. Pellizzoni has made a name for himself as a decorator of choice for many wealthy, first-generation migrants to the British capital.

WSJ: How Maurizio Pellizzoni Is Bringing Warmth to London

Cotran's austere home, Mr. Pellizzoni ordered suede ottomans and handsome dark club chairs from Ralph Lauren. (On average, he says, 80% of the pieces used come from his former employer, for which he gets a commission.) Fuchsia flowers and ornaments such as Chinese ceramic vases and a small sculpture of the Buddha are scattered over the property.

WSJ: How Maurizio Pellizzoni Is Bringing Warmth to London