The house shares a well with a neighbour. What should I check?

Recorded is the word that matters

An unrecorded arrangement binds the people who signed it, not the person who buys next door in three years. Recording is what attaches the arrangement to both properties so it survives a sale.

This is also what lenders look for. Expect a recorded agreement, along with a permanent easement covering physical access to the well and the water line, to be a condition rather than a nicety — particularly on FHA and VA financing, where the requirement is long-standing.

Lender guidelines change and individual lenders add their own overlays, including on minimum yield and on how many homes may share one well. Confirm the current requirements with the actual lender early, because this is a condition that can surface late and stall a closing.

What the agreement needs to say

Who owns the well, and whose land it sits on.

Access. A permanent, recorded easement for getting to the well head, the pump and the line — including for a repair crew. Right to the water is worthless without the right to reach the equipment.

Cost sharing. How routine maintenance, power, testing and capital repairs are split, and how a party who will not pay gets dealt with.

Use limits. What each household may draw, and what happens in a dry summer when the well cannot serve both at full tilt.

Failure and replacement. Who decides, who contracts, who fronts the money, and what happens if the well has to be redrilled somewhere else.

Water testing. Who tests, how often, and who pays — separate from the seller's own testing obligation on a sale.

Do the physical diligence too

Pull the well log through the Water Resources Department and look at the depth and the yield at completion. One well serving two households is doing twice the work, and a modest yield that is fine for one house can be marginal for two.

Find out where the well, the pressure tank and the lines actually are, and whose power runs the pump. A pump on the neighbour's meter is an arrangement waiting to become an argument.

Ask what has actually happened. Has it run dry in a hot August? Has the pump been replaced? Who paid, and did anybody argue about it?

If there is no agreement

Getting one drafted and recorded before closing is usually the cleanest fix, and it is far easier while the seller still has a reason to cooperate. After closing you are asking a neighbour for a favour with nothing to trade.

If the neighbour will not sign, that tells you something worth knowing about the next ten years, and it belongs in your decision rather than in your hopes.