Energy certificates: new documents from 30 September 2026
Why this matters now
MITECO has published new models, technical conditions, XML formats and rating documents applying from 30 September 2026. Current documents remain applicable until then. For an ongoing renovation, the practical question is which framework applies to each certificate and which files the assessor must prepare.
The useful decision is not reacting to a headline or a photograph. It is defining the goal, collecting information and comparing measurable line items. Start with building evaluation report and compare renovation project before accepting a quote.
This topic connects with documents for the energy-renovation tax deduction. A durable renovation combines the building, services, community, budget and maintenance; if one is outside the scope, an initial saving can become a later issue.
Local impact and budget
The change does not by itself require a project to be brought forward or automatically invalidate earlier certificates. Where an owner needs before-and-after certificates for sale, rent, grants or tax relief, dates should be coordinated with the assessor and relevant adviser so the starting condition, delivered works and final documents form a coherent sequence.
In Alicante Centro, Playa San Juan, El Campello, Torrevieja, Benidorm, Denia, Javea or Altea, the same scope changes with orientation, starting condition, home use and community rules. A survey should document what an advert does not show: services, routes, shared elements, damp and access.
Also compare heat-pump installation and PVC window replacement. The goal is to separate a desirable upgrade from a technical condition that can block works, change the programme or create an extra once finishes are opened.
How to turn it into a controlled project
Create one record containing the initial certificate, XML, label, plans, photos, accepted quote, changes, invoices and equipment certificates. Ask which model and software will be used for the planned date, and do not confuse publication of a new document with an energy improvement already achieved.
Ask each quote to detail measurements, materials, labour, protection, waste, programme, exclusions and responsibility. A total price without these pieces can orientate, but does not allow you to compare providers or approve changes confidently.
Keep dated photos, drawings where available, minutes and approved decisions. This traceability reduces disputes, enables maintenance and helps another professional understand the scope if it is delivered in phases or the responsible person changes.
Documentation that protects the decision
Before starting, confirm in writing the scope, access, community conditions, materials to be installed and the person responsible for each check. During the works, record changes, photographs and tests in the same file so every decision has a date and understandable reason.
At completion, hand over manuals, warranties, material references, service photographs and a maintenance list. This file is useful for the owner, community and any professional who needs to intervene later; it also prevents a small repair becoming work without context. Confirm the handover contact, the next maintenance date and the location of every access panel before closing the project. Keep every approved variation in the same project record.
Practical checklist
Use this list before requesting quotes or approving the intervention.
- 1Set record datesTiming
Record the initial certificate, start, completion and later certificate dates.
- 2Keep digital filesData
Request the XML and available documents, not only an image of the label.
- 3Document changesEvidence
Link installed windows, insulation and equipment to invoices and photos.
- 4Confirm final purposePurpose
Clarify whether it is for sale, rent, a grant, tax relief or project monitoring.
Frequently asked questions
Must every certificate be renewed on 30 September?
What if works cross that date?
Does the new label improve the rating?
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