Note
Buying a property with a well in Spain
Quick answer
Ask for the well’s registration in the water register, the technical description, the meter, the flow and the quality test. Ask neighbours about dry years, check the pump and the pipes, and write the seller’s statements into the contract. An unregistered well is a legal risk, not a detail.
Applies toBuyers of a country property whose water comes from a well.
On this page: 10 sections
§ 1A well is a legal object
When a house comes with a well, you buy an installation and a right to use water. The right depends on registration and on staying within the rules. A well that works but is not registered can be refused registration, sealed or sanctioned, according to the Ebro basin authority’s instructions. This page belongs to the chapter on internet in Rural Spain, and it builds on more on wells and water.
§ 2The papers
Ask the seller for the registration in the water register, the technical description of the well, any prior authorisation, the meter and its readings, and any water test. The Ebro instructions say the owner must register before using the well and that proof of ownership must be a deed, not a cadastral certificate or a private document. If the seller has none, ask your lawyer to approach the authority before you commit.
§ 3Check the plot
The owner’s regime covers use only on the same plot, up to seven thousand cubic metres a year. If the well supplies a neighbour or a second house on another plot, that use is outside the regime and needs a concession. Check what the water serves and how pipes run, and check the distance to other wells, since the distance rules can limit rights.
§ 4Test the supply
Ask for the history in dry years, ask neighbours and look at the pump, the pipes, the tank and the pressure. A specialist can measure the level and the flow. Ask for a lab analysis of the water if you will drink it, and for a repeat in a different season. We found no official limits or thresholds to quote.
§ 5The pump and power
A well needs a pump and power. Check that the electricity supply is legal and sufficient, as electricity for a rural home explained explains, and that the pump is sized to the depth. A solar pump is an option that needs its own design.
§ 6The contract
Write the seller’s statements into the contract: that the well is registered, that it supplies the house, that no sanction or procedure is open, and that the papers have been handed over. Ask your lawyer to add a condition if the registration is missing. The legal process section explains the checks and the clauses.
§ 7Costs
Budget for registration, a meter, a technical report, repairs and, if needed, a new well or a connection to a network. We found no official price list, so ask for quotes.
§ 8Sewage
Water in means water out. Septic tanks explained explains the rules for septic tanks, which also protect the groundwater your well uses.
§ 9What we could not verify
We read the Ebro instructions only. Your basin may have different documents and distances.
§ 10Ask the neighbours
Neighbours with wells know how the aquifer behaves. Ask whether the water has ever dropped, whether anyone drilled deeper, and whether a nearby well was ever disputed. Their answers are not legal proof, but they tell you what to test.
FAQRelated questions
What papers should the seller show?
The registration in the basin authority’s water register, the technical description of the well, any authorisation, the meter data and recent water tests. If none exists, treat it as a legal problem and ask your lawyer how to resolve it.
How do I judge the flow?
A single day is not proof. Ask for records over a dry season, ask neighbours, and ask a specialist to test the pump and the level. A well that works in spring may fail in late summer.
Can I make the seller fix it?
You can ask for the seller to register or repair before completion, or reduce the price, or make completion conditional. A lawyer should write it into the contract, since a promise after completion is hard to enforce.
Sources
- Confederación Hidrográfica del Ebro: Instrucciones generales para aguas subterráneas (2023 version 3) (official source, opens in a new window), Art. 54.2 wells: volume, registration, distancesLast checked 18 October 2026
Legal note. How the process works in general. It is not legal advice, and it never replaces an independent Spanish lawyer acting for you.