Check the certificate and its place in the property file

An energy-performance certificate provides information about a building’s assessed energy performance. For a property transaction, you also need to know whether the correct certificate is required, current, registered and supplied through the appropriate process. A coloured label in an advertisement is only part of that enquiry.

This guide helps buyers, sellers and owners organise the Spanish certification questions, with an Andalusian focus. It does not issue a rating, determine an exemption or promise a household’s future bills. Use the actual property, intended transaction and a currently competent professional.

Identify the correct property and certificate

Check the address, unit, reference information and scope of the document. Ask whether it concerns the individual home, an applicable building assessment or another defined subject. A certificate for a neighbouring apartment should not be treated as evidence for yours.

Record the issue date, rating, registration information and any stated limitations. Keep the full document rather than only a cropped label. A buyer should be able to connect what was advertised with the evidence supplied for the actual transaction.

If the property has changed materially since assessment, tell the relevant professional. Ask whether an update is needed instead of assuming a document remains descriptive simply because its maximum period has not yet expired.

Understand the legal starting point

Royal Decree 390/2021 provides the national certification framework, as amended. It includes the phrase:

certificado de eficiencia energética

That is the energy-performance certificate. Scope, exemptions, obligations and the correct procedure need to be checked against the actual building and transaction. Avoid relying on a short list copied from the repealed 2013 framework without verifying its current basis.

The relevant national provisions and regional administration work together. A professional should explain which documents are required for advertising, sale, letting or the relevant construction stage, rather than treating one generic PDF as the answer to every situation.

Check validity without using a universal ten-year rule

Article 13 sets a maximum validity of ten years, with a five-year maximum where the rating is G. Regional renewal and updating conditions also need attention. Check the actual dates, property and circumstances rather than assuming every certificate lasts ten years.

Ask who is responsible for arranging renewal and how it fits the marketing timetable. A sale or letting plan should not leave the enquiry until the final appointment if information is required earlier in the process.

Keep validity separate from accuracy. A document can raise a factual question about the property even before its expiry date. Explain relevant alterations and ask the certifier how they affect the assessment and record.

Choose a currently competent certifier

Ask who will perform the assessment, their current basis of competence and the service scope. Confirm what inspection, data collection, calculation, registration and delivery are included. A low quote is difficult to compare if one important task is excluded.

The Andalusian registry’s current notices identify 2026 changes concerning professional accreditation and accepted electronic report formats. Ask the provider to confirm compliance with the current process, rather than relying solely on older marketing claims about qualifications.

IDAE’s information also warns that it does not itself homologate or accredit certification businesses or people. Verify any claimed status with the competent route rather than accepting a logo as proof of approval.

Prepare useful assessment information

Provide available plans, equipment details, relevant work records and information about access. Tell the professional about inaccessible spaces and known changes. Accurate inputs are more useful than trying to obtain a preferred letter through an incomplete description.

Ask what will be inspected and what assumptions may be used where information is unavailable. Preserve that explanation with the report. An assessment’s usefulness depends partly on understanding its scope and evidence.

Do not alter the issued report yourself to correct a name, area or equipment description. Raise the issue with the professional and use the proper correction and registration process where required. Keep versions traceable.

Confirm the Andalusian registration step

Ask whether the appointment includes submission to the regional register and what evidence you receive. A professional report, registration acknowledgement and public consultation result have different roles. Keep the relevant identifiers and final documents together.

The registry notice consulted on 27 October 2026 refers to the new XML v3.0 structure for certificates issued from 1 October and a provisional transition for older formats. That transition should not be assumed to remain open indefinitely. Have the provider check the current accepted route before submission.

This technical filing requirement belongs with the certifier or administrator handling it. As an owner, the practical question is whether the correct record has been accepted and what document confirms that status.

Use the rating as information, not a bill forecast

The assessment describes energy performance under its methodology; your actual spending also depends on use, occupancy, equipment operation, tariffs and other circumstances. Do not turn a rating into a guaranteed annual bill without a defined calculation and assumptions.

Ask the professional to explain the principal findings and recommendations in plain language. Understand what an improvement is expected to affect and what further design, cost or permission work would be needed before acting.

Read the energy-improvements guide to connect comfort, fabric, ventilation and equipment. A promising recommendation should become a properly assessed project rather than an automatic instruction to install a particular product.

Keep certification separate from condition and legality

An energy certificate is not a structural survey, a comprehensive damp diagnosis or a legal opinion about an extension. Do not treat the presence of the document as proof that every physical or planning issue has been checked.

Use technical inspections and the structural-and-damp guide for the appropriate condition brief. Use independent legal advice for title, planning and occupancy questions.

If different reports describe the property differently, raise the discrepancy rather than choosing the most favourable one. The professionals may need to explain their different scopes, correct an error or investigate a change.

Organise advertising and handover evidence

Ask the agent and adviser what information must appear in the relevant marketing and which documents must be supplied at the applicable transaction stage. Confirm any exception through the proper assessment rather than assuming a small or seldom-used home is exempt.

For a new or unfinished property, distinguish project-stage information from the completed-building certificate and ask when each is required. A promise to supply the final record later needs a responsible person and a clear follow-up.

Keep the approved marketing material and the document actually delivered. That makes it easier to answer a later question about what was represented and whether the correct property evidence accompanied the sale or letting.

Leave a usable record for the next owner

Retain the final certificate, label, registration evidence, professional contact and relevant recommendations. Record an appropriate review point and any trigger for earlier updating. A scheduled reminder is an organising tool, not a claim that a future reassessment has already occurred.

Use the legal-and-technical worksheet to track identity, competence, validity, registration and handover. The aim is reliable energy information with the right formal record, while keeping condition, costs and legal suitability in their separate professional enquiries.

Check the handover set before closing the task

Ask the responsible professional to identify the final report and registration evidence, including any correction made after the first issue. Keep the accepted versions together and label drafts clearly. That prevents an old label or unregistered working copy being reused in later marketing while the correct record sits elsewhere in the file.