An Arapahoe County private well starts with a state permit record

A private well on Arapahoe County land with no city water line is a legal record before it is a physical pipe. In Colorado, groundwater is permitted by the state, and the Division of Water Resources keeps the well permit and the drilling record. The pump in the ground is just the hardware; the permit is what decides whether you may use that water at all, and for what.

So the real question is never simply whether a well exists. It is what the state permit allows and whether that matches how you intend to live on the land. A permit written for household use inside a single home does not stretch to cover watering livestock, irrigating a few acres, or supplying a second dwelling. Those are different uses, and a well drilled for one will not legally serve another.

This is the kind of detail that decides a purchase. Buying vacant acreage, building a new house, adding a unit, or counting on irrigation all rest on the permit, not on the well house you can see during a walk-through.

A residential building file that depends on a well is steered to the on-site permit when there is no public water connection, so the two records need to agree. Pull the DWR well permit record early to read the allowed use in writing, and confirm with the county which water documents your specific building or land-use plan will require.