If you’ve ever watched an episode of the Bravo reality show “Million Dollar Listing,” you’ve likely concluded that, unlike the larger-than-life mansions in Beverly Hills and posh Los Angeles that are the centerpiece of the program, the effort to sell them is often far from glamorous.

The three Millennial real estate agents who star in the series have to put up with cut-throat competition for some of the most fabulous properties in Southern California, a soft market yielding offers far below what their demanding and often-unrealistic clients expect and lots of drama in their personal lives.

Josh Flagg, 27, who stars in the show, was among several celebrities who stopped by the Home and Remodeling Show at the Dulles Expo Center over the weekend. Despite his experience in the high-roller world, Flagg dispensed some down-to-earth advice to hundreds of people who sat in on his Q&A sessions.

Josh Flagg of Bravo’s “Million Dollar Listing”

Here are some highlights:

●Responding to a question on how to go about selecting a designer to draw up plans for a kitchen renovation, Flagg suggested taking the less-pricy route.

“Designers can be $1,000 an hour in Los Angeles,” Flagg said. “Just spend $4 and buy a magazine, then show the contractor a picture of what you want. . . . There’s no reason to have a designer unless you’re doing something so complicated it’s beyond your capability.”

●Asked whether carpet, hardwood or engineered wood floors is best, he said it depends on the circumstances.

“I hate laminate flooring,” Flagg said. Still, if you’re renting out your property “laminate is fine” because it’s durable. “When you’re coming to buy a house, everyone wants hardwood floors. . . . Carpet can be put into a bedroom to save money” and to provide warmth for bare feet.

●Commenting on the shades of hardwood that are trending now, he said, “Dark hardwood is popular — lights were popular 10 years ago.”

●Answering a question on whether it would be wise to finish a basement before putting a house on the market, Flagg said, “Leave it alone. I don’t think you’ll see much more money out of the house [by finishing the basement]. Just to get the permits [for the work] will cost a fortune.”

●Still, questioned about whether to expand the bathrooms and closets in a 1940s house, Flagg said, “Sure, I think it’s a great idea. If you have a really small closet and a really small bathroom, women aren’t going to like that.”