When do you need to get an attorney involved in selling your house? The quick answer is right away.
The first time you should consult an attorney is before you sign a listing agreement with a realtor. Many of the "standard" or "form" listing agreements are heavily slanted against the seller or contain provisions that surprise sellers when they actually find out what the agreement says, usually when it is too late to do anything about it.
Most of the listing agreements in the Chicagoland market indicate that a real estate broker's commission is earned once the broker has produced a "ready, willing and able" purchaser of your property. "But what if the deal does not close, I don't owe a commission, right?" Wrong. If your buyer defaults on the transaction after satisfying all of the buyer's contingencies (ie. the buyer defaults and fails to close), the seller likely owes the real estate brokers a commission.
In reality, many real estate brokers do not try to collect this commission. They want to keep goodwill with their seller client and they understand that they will get a commission when the property does eventually sell. But what about the selling agent who is out a commission and what about the listing agent who has had a falling out with the seller during the course of a deal. They may want their commission... and they are entitled to it.
There are more than a few reasons to take a look at the listing agreement before it is signed. Among others, the attorney can assist a seller to determine the rights and obligations of the seller if the seller finds the buyer without the help of the agent; if the seller has any right to avoid a commission for people who looked at the house before it was listed; and in the event that the real estate agent acts as dual agent. Other questions can be answered such as how does the seller terminate the agent relationship?; is a commission owed to the agent if the seller gets a contract after terminating the agent?; or are there any "hidden fees"? (sometimes a commission will actually be "5% of sale price plus a $225 processing fee). In most cases, under the terms of the "standard" listing agreement, the real estate agent will come out on top in regard to those issues.
Many real estate agents are excellent to work with and understand some of the shortcomings of the form listing agreement. In fact, many are very willing to make modifications to the agreement so that the seller can preserve some rights and better deal with some of the situations which can arise during the course of an agency agreement.