The general rule is that any facts known to the seller which would materially affect the decision of the buyer and/or the value of the property must be disclosed to the buyer. This rule has been applied to deaths or murders in the house being sold, but not applied to general crime statistics in the neighborhood which are equally available to the buyer. Without knowing more about the circumstances of the burglary, how long ago it happened, any likelihood of it being repeated, etc., etc., it is a close call whether a single burglary would be legally required to be disclosed, but if your agent is probably more familiar with the locale and may be wanting to err on the safe side to protect you both from potential liability.
