LONDON — Edoardo Mapelli Mozzi is not your typical London property developer.

For one thing, he started his own property and design business, Banda, when he was just 23, and in the 12 years since, he has carried out some of the most interesting high-end projects in the city.

He has firm ideas about how to find and maximize value in a market that has been knocked off balance since the 2016 Brexit referendum.

Oh, and he is also rumored to be marrying into the British royal family some time soon.

Since last year, Mr. Mozzi has been dating 31-year-old Princess Beatrice of York, ninth in line to the throne.

When I suggest to Mr. Mozzi after a tour of his latest project, a 15-unit development in Notting Hill, that there is likely to be great interest in his personal life, he is determined to keep the discussion focused on his business.