Legally speaking, you have to inform the seller of various things as early as the advertisement for a property for sale: the EPC certificate, the urban development destination, whether or not there are any permits for urban development activities, whether or not a writ of summons or a court order has been issued for the property, whether or not there is a right of first refusal, whether or not a subdivision permit applies, whether or not there is any soil pollution, and whether or not the property is located in a flood plain.
In addition, it is also important that you inform a prospective buyer of any serious defects in the property that he may not be able to see simply on a visit. The fact that there was once a leak because of a problem with the roof that has been fixed, for example, is not important. But if you know that there is, for example, a house fungus, and you don't report it or you camouflage a defect like this, you are making a big mistake. Our principle is, let us know everything you would want to know yourself if you were the buyer. Not down to the smallest details, but everything you think is important. It is also important that the buyers feel comfortable in their new home and don't have any unpleasant surprises.