Start with identification
The single most useful thing you can provide is a way to identify the parcel precisely. That usually means a street address, or if the land has never been assigned one, the parcel or APN number from your county assessor.
If you do not have either, the county tax bill almost always contains the parcel number, and most county GIS websites let you search by owner name.
Size, shape, and boundaries
Approximate acreage is enough to begin. Exact figures come from the deed or the county record, and a survey, if one exists, is helpful but not required to start a conversation.
If you know the parcel is unusually shaped, narrow, or split by a creek or right-of-way, mention it. Those details change how land is evaluated.
Access and utilities
Access is one of the most consequential factors in any land review. Note whether the parcel touches a public road, is reached by a shared or private drive, or depends on an easement across someone else's property.
For utilities, it is enough to say what you know: whether power lines run to the road, whether neighbors have wells or septic systems, or simply that you are unsure.
Ownership and tax status
Buyers will want to know who is on the deed, whether more than one person owns an interest, and whether property taxes are current. None of these need to be perfect before you reach out — they simply need to be disclosed accurately.