The definition of front foot is a person or an entity that has an advantage or has the initiative. It could also be used to suggest that someone is taking an offensive position. Based on the context, being on the front foot means that you take initiative or you have an advantage. For example, saying that a football team is on the front foot, means that team has an advantage over their opponents or they are winning.
In real estate, we define front foot as a property measurement of the front footage of a parcel of property adjoining the street. In real estate more land is always better for the value of the property.
In urban areas, the front foot measurement is an extremely important indicator of property value and property is often evaluated on the basis of cost per front foot. Normally, the front foot is the first measure shown in a property description.
In commercial real estate it is important to have a wide lot, which means the bigger the front foot of a commercial property the better, because this allows for larger spaces where you can advertise more.
For houses the front foot is important because on a wider lot it is possible to build a larger house or to create more space between the house and other buildings next to the lot. Also it allows for better parking in front of the property or to build a duplex on the lot.