2026 ADENE Fees: Energy Certificate Costs in Portugal

The ADENE fees correspond to the registration value of the energy performance certificate on the SCE Portal — Building Energy Certification System (Sistema de Certificação Energética dos Edifícios). These values do not, in themselves, represent the total price of an energy certificate, as the Qualified Expert’s fees and applicable VAT are typically added to the registration fee.

In Portugal, an energy certificate is an essential document for property owners, buyers, investors, and developers who intend to sell, rent, purchase, or renovate a property. Far more than an administrative obligation, it serves as a valuable tool to understand a building’s energy performance, identify thermal weaknesses, and guide decisions regarding architectural design, indoor comfort, and property value enhancement.

The current legal framework for the Building Energy Certification System stems from Decree-Law no. 101-D/2020, which sets out energy performance requirements for buildings and regulates the SCE. Ordinance no. 138-H/2021 defines, among other aspects, the registration fees for energy certificates on the SCE Portal. The DGEG (Directorate-General for Energy and Geology) notes that energy assessments may include a survey of the building envelope and technical systems, occupancy profiles, and energy consumption simulations or quantifications.

Energy Certification Overview:

The final cost of issuing a certificate is the sum of the official public registration fee, the technical work of the Qualified Expert, and current VAT. It is an essential document to validate the efficiency of any property prior to its transfer or renovation.

What are ADENE fees?

ADENE fees are the official charges paid for registering an energy performance certificate on the SCE Portal. In practice, when requesting an energy certificate, the final cost combines the official registration fee, the expert’s professional technical services, and VAT.

Therefore, when asking “how much does an energy certificate cost?”, it is crucial to clarify whether the quote refers strictly to the official registration fee or the all-inclusive service price.

ADENE fee schedule for energy certificates

The figures below reflect the baseline registration fees set out in Annex III of Ordinance no. 138-H/2021, excluding legal VAT. The ordinance allows for annual fee adjustments; thus, exact figures should always be confirmed on the SCE Portal at the time of issuance.

ADENE fees for residential properties

ADENE fees for commercial and service properties

Are ADENE fees and the total energy certificate price the same?

No. The ADENE fee represents only a fraction of the total cost. The final cost of an energy certificate depends on the official registration fee as well as the Qualified Expert’s professional fees, the architectural complexity of the property, documentation availability, site visit requirements, building type, and the depth of technical analysis.

Energy certificates include targeted recommendations to upgrade building performance. According to the DGEG, Qualified Experts are responsible for assessing building energy performance under the SCE, issuing pre-certificates and certificates, identifying cost-effective improvement measures, and advising property owners on implementing these solutions.

When is an energy certificate legally required?

As a general rule, an energy certificate is required in scenarios such as:

• Property sales and lease agreements;

• New construction or major building renovation projects;

• Real estate listings and advertisements, where the energy rating must be displayed, unless specific statutory exemptions apply.

The SCE Portal provides FAQs and guidelines regarding energy certification obligations, including mandatory rating displays in property marketing. Official SCE guidelines mandate disclosing the energy rating in sale or rental ads, provided the building is not covered by a statutory exemption.

For international investors, foreign buyers, or owners evaluating how to build or invest in a villa in Portugal, this point is particularly critical. An energy certificate should not be viewed merely as a bureaucratic requirement for the deed or lease contract. It directly impacts purchase decisions, renovation strategies, intervention costs, and market valuation.

When can fee exemptions, reductions, or waivers apply?

It is essential to distinguish between three distinct regulatory concepts:

• Registration Fee Exemption: An energy certificate may still be required, but the official registration fee may be waived under specific statutory circumstances;

• Registration Fee Reduction: The registration fee amount may be reduced in specific qualifying scenarios;

• Energy Certificate Exemption: The property itself may be fully exempt from energy certification obligations if covered by legal exceptions.

Specific applicability must be evaluated case-by-case, depending on the property, purpose, and legislation active at the time of application. For instance, specific rules apply to certificate updates within their validity period, conversions from pre-certificates, or specialized frameworks under the SCE.

How to obtain an energy certificate in Portugal

The certification process must be conducted by a Qualified Expert registered within the National Building Energy Certification System (SCE). Briefly, the process involves:

• Hiring a Qualified Expert: Properly credentialed under the SCE framework;

• Gathering property documentation: To prevent delays and ensure accurate technical characterization;

• Facilitating the technical site inspection: Allowing the expert to assess the physical envelope, existing systems, and actual conditions;

• Issuing the energy certificate: Official submission and registration via the SCE Portal;

• Reviewing improvement recommendations: Essential when planning to sell, lease, purchase, or renovate.

This step should never be left until the final stage of a transaction. Requesting a certificate too late can cause closing delays or lead to missed opportunities for informed architectural and investment decisions.

What documents are required?

Required documentation can vary depending on property specifics, but typical preparation involves:

• Land Registry Certificate (Certidão do Registo Predial) and Tax Property Card (Caderneta Predial Urbana);

• Architectural floor plans and Housing Technical File (Ficha Técnica da Habitação, where available);

• Previous energy certificate, if existing;

• Technical specifications for heating, cooling, ventilation, and domestic hot water (DHW) systems;

• As-built drawings, specialty engineering plans, or available technical project documentation.

For older properties, partially renovated buildings, or unrecorded alterations, document collection requires special care. Missing documentation may necessitate additional technical verifications, complicating the expert’s assessment.

What an energy certificate reveals before buying or renovating

For a property owner, an energy certificate satisfies a statutory requirement. For a discerning buyer or investor, it serves as a powerful decision-making asset. The certificate clarifies:

• The official energy rating class of the property;

• Envelope vulnerabilities, such as uninsulated walls, roofs, floors, and window assemblies;

• Thermal comfort deficiencies and inadequate technical HVAC systems;

• Efficiency upgrade potential and strategic priorities for future renovation.

When acquiring property for rehabilitation, this assessment should occur as early as possible. While an energy certificate does not replace a full architectural or structural survey, it uncovers underlying issues that influence design direction, budgeting, and value-add strategies.

For example, a low energy rating often points to thermal bridging, single-pane glazing, absent insulation, or ventilation flaws. For investors, this insight clarifies capital expenditure expectations. For architects, it informs critical design decisions regarding orientation, daylighting, materiality, shading, and passive solar performance.

Energy certification and building rehabilitation: why early integration matters

In building renovation, energy performance relies on much more than replacing mechanical equipment. Fundamental efficiency measures are rooted in core architectural choices. Thermal comfort and efficiency are directly shaped by solar orientation, window proportioning, shading strategies, envelope insulation, natural ventilation, materials, and mechanical system integration.

Addressing energy performance only at the end of a project results in lost design opportunities. Conversely, embedding performance analysis into the early schematic design phase in architecture leads to far more cohesive, cost-effective, and sustainable outcomes.

For historic properties located in urban conservation areas, efficiency upgrades must be carefully balanced with heritage preservation. To explore local tax incentives and municipal grants, consult our guide on ARU and ORU urban rehabilitation zones and their tax benefits in Portugal.

How MJARC integrates energy certification into architectural design

At MJARC Arquitetos, we view energy certification as an integral component of a holistic building assessment, rather than a standalone paper exercise. While energy classes are important, we evaluate them alongside spatial quality, natural lighting, indoor air quality, passive performance, construction budget, and long-term asset value.

Whether working on historic rehabilitation, luxury custom homes, or commercial developments, our early energy analyses directly inform spatial massing and envelope design, driving our commitment to sustainable and energy-efficient building design.

Common Pitfalls to Avoid:

Avoid confusing the ADENE registration fee with the final service price, delaying certification until the closing deed date, ignoring technical recommendations, or treating certification as mere red tape rather than a strategic design tool.

Frequently asked questions about ADENE fees and energy certificates

• Do ADENE fees represent the total price of an energy certificate? No. ADENE fees cover only the official registration charge on the SCE Portal. The final total price includes the Qualified Expert’s professional fees plus applicable VAT.
• Who sets the ADENE fee amounts? Official registration fees are established by Portuguese national law under the SCE framework (Ordinance no. 138-H/2021) and are subject to annual adjustments.
• Do fees vary based on the property? Yes. For residential buildings, fees vary according to typology (T0 to T6+). For commercial and service buildings, fees scale based on useful floor area.
• Is an energy certificate mandatory to sell a house in Portugal? Yes, as a general rule, unless covered by specific statutory exemptions under national building regulations.
• Must the energy class be included in real estate advertisements? Yes. SCE regulations mandate that all sales or rental advertisements explicitly state the building’s energy performance rating.
• Does an energy certificate help in a renovation project? Yes. It identifies priority improvement measures that inform thermal comfort and energy efficiency strategies during architectural planning.
• Does an energy certificate replace an architectural project? No. Energy certification measures thermal and system performance, whereas an architectural project translates technical data into a comprehensive spatial design.

Official references and legal sources

• Decree-Law no. 101-D/2020 — National Framework for Building Energy Certification (SCE).
• Ordinance no. 138-H/2021 — Registration fees for energy performance certificates on the SCE Portal.
• Directorate-General for Energy and Geology (DGEG) — Building Energy Certification System Technical Manual.
• ADENE / SCE Portal — Official FAQs and legal documentation on building energy certification.

Note: The information provided herein is for general informational purposes only and does not replace consultation with current legislation, official guidelines from the SCE Portal, DGEG, ADENE, or advice from credentialed Qualified Experts.