The entrepreneur runs the The Oppenheim Group with twin brother Brett, which is the company at the heart of the hit Netflix series.
He told Hello magazine: “Had I known the show would be this focused on our personal lives I probably wouldn’t have signed up for it.
“I wanted it to be all about the nuances of real estate, but I now realise the show I envisaged wouldn’t be that popular! I’ve come to accept the idea that I’m on more of a reality show than a real-estate show.”
Oppenheim, who said he is currently trying to sell Orlando Bloom’s house, which is on the market for £8 million, added that he would do his job even if it involved less money, after initially training as a lawyer.
He said: “It wasn’t that I didn’t enjoy being a lawyer, but I didn’t have the passion and drive for it. I’m more of an entrepreneur; I wanted to own my own business and I’m truly passionate about real estate.
“Being a lawyer felt like work but this doesn’t; to be honest, I’d do this job for 10% of the money that I make. That’s how much I enjoy this work.”
He added that he thinks having a beautiful home is vital for his career, saying: “In this industry, I think it’s important to have an impressive property – and I think it’s important to live in a location where you are doing business.
“When I tell people that I own several properties in the Hollywood Hills and I am encouraging them to buy a property in the area, I think it speaks volumes that I put my money where my mouth is.”
The full interview is in Hello, out now.