California law places specific limitations on how long you can extend a residential listing agreement. A real estate listing agreement also known as a seller's agent agreement is a contract between a property owner and a real estate broker.A residential listing agreement is an contract between a property owner and a real estate broker where the broker lists the property for sale. Many include a renewal clause, which provides an option to extend the listing period if both parties agree. A listing agreement is a legally binding contract between the seller (you) and the real estate brokerage that helps you sell your home. Whether or not a real estate agent can collect commission really depends on the commission protection period as defined in your listing agreement. Remember, a listing agreement is a legally binding contract. ("Broker") beginning (date). Selling your home and not sure what a listing agreement is? Our comprehensive guide will help you navigate this crucial contract with ease.