Answer:
Yes, any defects known to the broker should have been disclosed to the buyer.
Explanation:
When a liscencee represents mother the buyer and seller in a transaction it is called dual agency.
Most real estate agents work either for the buyer or the seller. Dual agents are a small category that represents both buyers and sellers.
Dual agents should be neutral and represent each party's interest equally.
If there is a material defect it is his duty to disclose this to the buyer. This fosters transparency and prevents the seller from cheating the buyer.
