Unless you are an experienced home buyer, it is always a good idea to have a buyer's agent on your side. Be aware that in this case, the builder may not be obligated to pay your buyer's agent. The cooperation agreement that most builders extend to the brokerage community generally provides that, in order for the broker to be paid a commission by the builder, the broker must be present at least 3 times during the purchase: 1) the first time the buyer walks through the door, 2) at the time the contract is signed, and 3) at closing. Since you have already spoken with the builder, they could claim that your agent was not the "procuring cause," and refuse to pay a commission. If that is the case, you would be responsible for paying your agent. In this market, however, some builders will overlook the break in protocol so as not to jeapordize the sale. You should discuss this with your agent, the builder, and legal counsel in order to avoid a last-minute misunderstanding. With all of that in mind, a buyer's agent will be invaluable in helping you buy your new home. Good luck!