How some of the rich and powerful use U.K. real estate to hide their millions

London — Bishop's Avenue is one of London's most expensive residential streets. Locals know it as "Billionaire's Row." 

"Each house is really a medium-size hotel. That's the best way to think about it — with seven-star luxury," Trevor Abrahmsohn told CBS News' Holly Williams. 

Abrahmsohn sells luxury properties to some of the world's wealthiest individuals, including a seven-bedroom house he showed CBS News, which is currently on the market. He said the home could go for around $25 million, and that, he said, was "a bargain."