Reading a Spanish energy certificate before your viewing

The listing looks promising. The next useful step is to ask for the information behind it. An energy rating is one part of that picture: worth understanding, but best read alongside your viewing notes and your advisers’ work.

You do not need to become an energy assessor to ask sensible questions. Start with the actual document, identify which home it describes and keep a short list of anything you cannot yet explain.

What does the certificate describe?

Spain’s rules describe an existing-building energy certificate as information about energy characteristics, a rating and possible improvement recommendations. Energy performance is assessed using standardised operating and occupancy conditions. It is not a promise of your future bills. [1]

For a buyer, the practical distinction is simple. “What does the certificate say?” and “How would I use this home?” are related questions, but they need separate answers. Your plans might include working from home, spending only part of the year there, or using rooms differently from the previous owner.

Ask for the document, not just a cropped label

Request the registered certificate and its label. For an existing building within the rules’ scope, a copy of both is to be annexed to the sale contract. Exemptions and the position of a particular property should be checked by your adviser. [1]

Before a viewing, ask the seller or agent to send a readable copy rather than a screenshot of a letter. Keep the file with the listing reference and the date you received it. Ask which home or part of the building it covers, and flag any mismatch for clarification.

Check the dates in context

The rules set a maximum validity of ten years, or five for a G rating. The ministry explains that the shorter G period applies to certificates registered from 3 June 2021; older certificates need their own date checked. Regional authorities set renewal and update conditions. [1] [2]

Rather than calculating a deadline from a photograph alone, ask who has confirmed that the certificate is current for this transaction. If work has been done since it was prepared, ask whether the document reflects the home being offered today.

Turn the paperwork into five viewing questions

These are practical prompts to agree with whoever is viewing the home. They are not a substitute for an assessment by a competent energy professional.

1. Which systems are actually present? Ask for the heating, cooling and hot-water equipment to be identified, with readable photographs of model labels where accessible and permitted.
2. What could be demonstrated? Record which equipment was shown operating and which was not. Keep “not tested” separate from “working” or “faulty”.
3. What has changed? Ask about replacement windows, equipment or other works since the certificate date, and request any relevant documents.
4. What remains uncertain? If something in the certificate seems inconsistent with the visit, write down the difference and ask the appropriate professional to explain it.
5. What needs a separate budget? Treat suggested improvements as questions for a specialist and a written quotation, rather than assuming they are included in the purchase or will cost a particular amount.

Keep ratings, condition and bills in separate columns

A useful buyer file has room for all three. Put the certificate and questions for its assessor in one section, dated viewing observations in another, and any bills the seller chooses to share in a third. Ask what dates, occupancy and services those bills cover before treating them as comparable to your plans.

An energy document does not settle every question about a roof, an installation or an alteration. If the visit raises a specific concern, agree who will investigate it and what answer is needed before your next commitment. Avoid turning an unanswered question into either an accusation or reassurance.

A simple message to send

“Please send the registered energy certificate and label for this property, confirm that they are current, and tell me whether any relevant work has been done since their date. At the viewing, please record the equipment present, what can be demonstrated and what remains untested.”

TrueCasa’s buyer-focused visits can help you organise practical observations within the agreed scope. Confirm any requested checks in advance. Energy certification, technical diagnosis and legal interpretation remain work for the appropriate qualified professional. Explore our current services or read about separating registry information from property condition.

Official sources

[1] BOE: Royal Decree 390/2021, consolidated text, particularly articles 2, 3, 13 and 17. Latest amendment displayed: 23 July 2025. Checked 20 October 2026.

[2] MITECO: questions about Royal Decree 390/2021, including certificate validity and the G-rating transition. Checked 20 October 2026.

Published 20 October 2026 by TrueCasa. Prepared with AI assistance and checked against the listed sources. General buyer guidance, not an energy assessment, individual legal advice or findings about a particular home.