When the tidal wave of Olympic tourists arrives in Paris in late July, Martin Cassan, like many other Parisians, will be traveling in the opposite direction, seizing the chance to earn some extra cash by renting out his apartment.

Tucked just under the beautiful Parc des Buttes-Chaumont, a 30-minute walk from the Parc de la Villette where several delegations will have their team houses during the Games, Cassan's flat is bathed in light and will be filled with the 37-year-old's books – and even some food.

In April, his one-bedroom apartment will be rented out for 90 euros ($97.50) a night before prices rise to 330 euros a night during the July 26-Aug. 11 sports extravaganza – by no means a bargain, but still far from the fantasized numbers that circulated last year.

Reuters saw a two-bedroom apartment with a private terrace in the Marais, nearer the city center, listed for 500 euros a night. It has yet to be rented out, according to its owner.

"There will be a lot of people in Paris, which gets really hot in the summer. Using public transport will be a bit complicated so I prefer to be in a place that's less crowded and more quiet," Cassan, an account manager, told Reuters.

Cassan will get around 45% of the nightly fee he will make after deducting accommodation operator Airbnb's cut, taxes and cleaning costs.

"If it's rented during the whole period of the Games, it's more than a month's salary," he said.

He is not forgetting the Olympic spirit, however, and may serve as a volunteer during the Aug. 28-Sept. 8 Paralympics.

Airbnb has said Paris 2024 will be "the biggest event in Airbnb's history, with affordable and convenient accommodation in the cities hosting events but also the surrounding communes, which are usually less touristy," according to Clement Eulry, director for France and Belgium at Airbnb.

"According to Deloitte, stays on Airbnb should enable hosts to generate additional income for the residents of Ile-de-France and generate more than 1 billion euros in economic impact in France," he told Reuters.

Paris, however, has strict rules and allows owners to rent their apartments for a maximum of 120 days a year.

"It's hard to control, however. But a law that's about to pass will make our agents' task easier and we will be able to crack down on illegal renting in a more efficient fashion," Paris deputy mayor for housing Jacques Baudrier told Reuters.

"As for the prices, I don't expect them to be sky-high as the market is going to regulate all this."