Tens of thousands of festival-goers are expected to descend on Montreal for Osheaga this weekend.

It's also going be very lucrative for Airbnb which is projecting its busiest weekend in Montreal to date.

That's raising concerns among property owners in the Plateau Mont Royal, who say they are worried about the noise and mess that comes with short-term renters.

But residents are also worried about the vast number of apartments that are being used for short-term rentals.

There are 4,500 listings in the Plateau Mont Royal on Airbnb, an astounding number of places for rent in a borough with a population of 100,000.

About 150,000 people are expected to attend all or part of the Osheaga festival this weekend, and Airbnb says this event has become the biggest draw for its company.

"Our hosts who are hosting this weekend in Montreal will earn $7 million and 97 percent of that stays with them," said Alex Dagg of Airbnb Canada.

One person renting out her apartment this weekend said it has been booked since February.

"I was amazed that they they started to reserve in February for July because it gets rented everywhere in Montreal," said Diane Labrecque.

She said renting out a room helps her pay her rent.

"I'm a super host. I've got more than 100 reviews. I've made friends from all over the world. It's a wonderful concept," said Labrecque.

But housing activists say the use of Airbnb is driving up rental costs, and leading to the eviction of tenants as landlords decide to become hoteliers instead.

Gabrielle Renaud of the Plateau Mont-Royal housing committee said it's time for Quebec or Montreal to shut down Airbnb.

"We want to ban Airbnb and after we will see what is possible and what is best for the people. We saw in Berlin, in San Francisco, in Los Angeles, that even if you put other law or restrictions, the phenomenon is getting bigger and bigger," said Renaud.

Quebec enacted a law in April 2016 requiring Airbnb landlords to register with the province. As of May 2017 the province had issued fewer than 1,000 permits, despite data showing about 20,000 Quebecers are using Airbnb to rent out property.

Individuals who violate the law can be fined between $2,500 and $25,000 daily, while corporations face penalties of between $5,000 and $50,000 a day.

The province is reviewing the law and is going to increase the number of inspectors for Airbnb properties.

Currently there are only 27 inspectors in the province.