The Certificado Energético in Portugal in 2026 - A Practical Guide to the SCE, the Qualified Expert, the A+ to F Energy Scale, the Costs, and When You Legally Need One to Sell or Rent

You cannot legally advertise, sell or let a home in Portugal without one, yet many newcomers meet the certificado energético (energy performance certificate) only at the moment of signing — when a missing document can stall a deal. This guide explains what the certificate is, who issues it, when the law requires it, what it costs and how to read the A+ to F rating that now sits at the top of every property listing.

What the certificate is

The certificado energético is the Portuguese version of the EU energy performance certificate. It grades a building's energy efficiency — how much energy it needs for heating, cooling, hot water and ventilation — on a scale from A+ (most efficient) down through A, B, B-, C, D, E to F (least efficient). It also lists the building's characteristics and a set of recommended improvements with their indicative payback.

The certificate is issued under the SCE (Sistema de Certificação Energética dos Edifícios, the Energy Certification System for Buildings), which is run by ADENE (the Agência para a Energia) under the Directorate-General for Energy and Geology (DGEG). Every valid certificate carries a unique number that can be checked on ADENE's public register.

When the law requires one

A valid certificate is mandatory, and its rating must appear in the listing, whenever you:

• Sell a property (the certificate must exist before it is advertised, and is handed to the buyer at the escritura);
• Let a property on a new lease;
• Build new or carry out a major renovation;
• Advertise a home for sale or rent — the energy class has to be shown in the advert itself.

Marketing a property without a certificate, or omitting the energy class from the advert, can draw a fine, so estate agents will normally insist on it before listing. A handful of buildings are exempt — for example certain standalone buildings under 50 square metres, places of worship, and some temporary or purely agricultural and industrial structures — but the default assumption for any normal home is that a certificate is required.

Who issues it — and what they do

Only a Perito Qualificado (PQ, a Qualified Expert) registered with ADENE can issue a certificate; you cannot self-certify and an estate agent cannot do it for you. The expert visits the property and assesses the building envelope (walls, roof, glazing and insulation), the orientation and the technical systems — heating, air-conditioning, hot-water and any solar or renewable equipment — before modelling the energy rating and uploading the certificate through the SCE portal.

What it costs

The total bill has two parts: a fixed ADENE registration fee, set on a scale according to the type and size of the property, plus the expert's professional fee, which is not regulated and varies by region and by how large or complex the home is. For a typical apartment, budget roughly €120 to €300 all-in; smaller studios sit at the lower end and large or unusual houses cost more. It is worth getting more than one quote from accredited experts, since the professional component is where prices diverge.

How long it lasts

For residential property the certificate is generally valid for up to 10 years, unless major works or a change of systems justify issuing a new one sooner; certificates for commercial and service buildings run for shorter periods. When the rating is improved by a renovation, a fresh certificate is the way to capture the better class.

The step-by-step

• 1. Choose a Perito Qualificado. Confirm the expert is registered with ADENE and ask for an all-in quote covering the registration fee.
• 2. Book the visit. The expert inspects the property; for older homes, having plans or the caderneta predial to hand speeds things up.
• 3. Receive the certificate. The PQ issues it through the SCE portal, usually within a few days, and you receive the PDF and the certificate number.
• 4. Use it. Put the energy class in the advert, give the certificate to the buyer or tenant, and keep the number for the deed.
• 5. Verify if in doubt. Anyone can confirm a certificate is genuine and current through ADENE's pesquisa de certificados (certificate search).

Why the rating matters beyond ticking a box

The class is increasingly more than a compliance formality. A better rating can lift resale value and rental appeal, and some municipalities grant an IMI (municipal property tax) discount for high-efficiency or improved buildings. Government efficiency schemes — the periodic Edifícios Mais Sustentáveis support and energy vouchers — lean on the certificate's recommendations to decide what work qualifies. And the bar is rising: Portugal is transposing the revised EU Energy Performance of Buildings Directive, which over the coming years pushes minimum standards and renovation of the worst-rated stock up the agenda, making a poor F or E rating a sharper liability for owners.

What This Means for You

• If you are buying: read the energy class before you fall in love with a place. An F-rated apartment can mean cold winters and heavy bills; factor the cost of improvements into your offer, and see our guide to buying property in Portugal and the Casa Pronta one-stop deed process.
• If you are selling: commission the certificate before you list — it is needed for the advert, and a strong class is a selling point. It is also one of the documents you assemble alongside the capital-gains paperwork.
• If you are a landlord: a valid certificate is mandatory for every new lease; pair it with the rest of the contrato de arrendamento obligations.
• If you are renovating: a heat pump, better glazing or insulation can move you up a class — and pairing works with solar self-consumption compounds the saving. Re-certify afterwards to lock in the improvement.

Treat the certificado energético as a small, predictable cost with an outsized gatekeeping role: a few hundred euros and a single home visit stand between you and the right to legally market, sell or let a Portuguese home — and the rating it produces will increasingly shape what that home is worth.