When someone participates in real estate in Pennsylvania they must agree that the land they are purchasing will not be used for unlawful purposes. For example, in Pennsylvania anyone who uses property for fornication or lewdness will have the property condemned as a common nuisance and charged with a misdemeanor. Likewise, if the owner of a property either knowingly allows or suspects that unlawful acts are being committed on their real estate, then the property can be subject to a lien and can remain in possession of the county until a judgment is entered and the lien is either paid off or the owner relinquishes their rights to ownership of the property.
If you were looking into real estate in Pennsylvania and you were considering buying a large tract of land consisting of many acres then you might worry about your responsibilities to keep that land safe to anyone who might pass across it. This can be a concern for people who are worried about lawsuits. For example, if someone was out walking and took a shortcut across your land and they happened to fall and injure themselves one might worry about their legal responsibilities for upkeep of the land in case of legal action. However, in Pennsylvania, the law states that the owner is only responsible for warning of an extremely dangerous condition, structure, or activity or if the owner of said land sent the person out onto the land where the injury was received.
If you own real estate in Pennsylvania who is not a spouse or a partner, then there can be some legal issues which may arrive through the partnership of this property. For example, if the land in question has a large wooded area and one of the owners wants to sale and remove the timber, then they must get the co-tenants consent. This is because the disposition of the timber on the land is actually considered to be physical, personal property which is attached to the title and removing without both parties' consent is tantamount to theft by one part of another. If one party does sell the timber, than the second party has al rights to that timber in whatever form it may ultimately have taken after it has gone through the manufacturing process.