The Canadian Real Estate Association (CREA) says allegations levelled at it by the federal Competition Bureau are "fundamentally misconceived."
The association's rebuttal came in its official defence to allegations that CREA rules squelch competition at the expense of consumers.
CREA denies that consumers must purchase a bundle of services from realtors in order to sell their house using the popular Multiple Listing Service.
CREA also says the bureau's allegations have mischaracterized the very competitive environment confronting real-estate agents.
It says realtors already offer a wide range of business models, including discounted services, flat-fee arrangements and fee-for-service arrangements.
The Competition Bureau rejected amendments made by CREA Monday to clarify its rules, saying the changes don't guarantee more choice for consumers.
The case will be decided by a quasi-judicial body called the Competition Tribunal, which released CREA's response to the allegations on its website Friday.