ARU and ORU Areas in Portugal: Tax Benefits, 6% VAT and Urban Rehabilitation Incentives in 2026

Urban Rehabilitation Areas (ARU) and Urban Rehabilitation Operations (ORU — Operações de Reabilitação Urbana) are the legal instruments framing the recovery of buildings, public spaces, and degraded urban areas across Portugal.

For property owners, investors, and real estate developers, holding property within an ARU can be a real opportunity: access to tax incentives, qualification for public financing programs, asset appreciation, and greater predictability throughout the rehabilitation process.

However, there is a common mistake: assuming that being located inside an ARU automatically guarantees all incentives. It does not. Applying benefits such as reduced VAT, IMI exemption, or IMT reduction depends on the project’s legal qualification, the nature of the intervention, the existence of an approved ORU, and formal validation from the competent authorities.

At MJARC Arquitetos, we see urban rehabilitation as an opportunity to enhance built heritage and transform high-potential properties into contemporary, efficient spaces prepared for modern uses—always starting from a rigorous reading of what already exists.

What is an Urban Rehabilitation Area (ARU)?

An ARU is a territorial area delimited by the municipality where an integrated intervention is justified due to the degradation or obsolescence of buildings, infrastructure, public facilities, or public spaces.

The Legal Regime of Urban Rehabilitation (RJRU), approved by Decree-Law no. 307/2009, defines an ARU as an area requiring integrated intervention through an urban rehabilitation operation approved via a dedicated instrument or a detailed urban plan (plano de pormenor).

In practice, an ARU identifies a priority area and can unlock:

• Tax benefits for property owners and investors;

• Municipal incentives and fee reductions;

• Priority access to financing programs;

• Appreciation of historic or vacant properties;

• Improvement of urban, environmental, and public space quality;

• Preservation of architectural heritage and local identity.

What is an Urban Rehabilitation Operation (ORU)?

While the ARU defines where to intervene, the ORU defines how to intervene. It is the instrument establishing the specific rehabilitation strategy within the delimited area: objectives, priorities, management model, execution schedules, planned public and private actions, and the framework for support and financing solutions.

Article 30 of the RJRU mandates that the urban rehabilitation strategy must outline strategic choices, implementation deadlines, management models, and the framework of incentives and financing solutions for the scheduled actions.

ARU vs. ORU: Summary of Differences

Understanding the practical distinction between both instruments is critical for properly structuring any project:

This distinction matters in practice: certain benefits depend not only on the property being inside an ARU, but also on the existence of an approved ORU and the specific type of intervention proposed.

What benefits can you get by renovating a property in an ARU?

Tax and urban planning benefits vary according to the municipality, current tax law, the building’s initial condition, and the scope of work. Key advantages include:

• 6% Reduced VAT Rate: Applicable to qualifying urban building rehabilitation contracts;

• IMI Exemption or Reduction: Typically for 3 to 5 years following completion, subject to statutory criteria;

• IMT Exemption: On acquisition for rehabilitation (provided works start within the legal timeframe) or on the first subsequent transfer;

• Municipal Incentives: Reduction or exemption of urban licensing fees;

• Financing Programs: Priority access to subsidized credit lines and public grants;

• Asset Appreciation: Significant increase in the commercial value of the asset.

None of these benefits should be assumed automatically. Always confirm applicability prior to starting construction—ideally with the City Council, the Tax Authority, and the technical team responsible for the project.

6% VAT on urban rehabilitation works

Item 2.23 of List I annexed to the VAT Code provides for the reduced rate (6% in Mainland Portugal) on building rehabilitation contracts and construction/rehabilitation contracts for public collective facilities, located in legally delimited ARUs, or carried out within requalification operations of recognized national public interest.

Before applying the reduced VAT rate, it is essential to verify:

• Whether the property is located within an officially delimited and published ARU;

• Whether an approved ORU is in place, when required for eligibility;

• Whether the intervention technically qualifies as a rehabilitation contract;

• Whether the works meet all legal and tax requirements under Item 2.23;

• Whether official municipal documentation is available to certify the property’s status.

Case Law & Eligibility:

This is one of the areas most subject to tax scrutiny. In 2026, the Supreme Administrative Court consolidated standardized case law regarding the application of the 6% rate under Item 2.23—reinforcing the obligation to validate the specific framework of the contract and the ARU/ORU before issuing invoices with the reduced rate.

IMI and IMT: What incentives apply?

Article 45 of the Tax Benefits Statute (EBF) establishes incentives for urban buildings or autonomous units completed more than 30 years ago or located in an ARU, provided they undergo rehabilitation works and meet legal requirements—specifically improving the state of conservation by at least two levels and satisfying applicable energy efficiency and thermal quality standards.

The following benefits may apply:

• IMI: Temporary exemption after completion of works, upon municipal recognition;

• IMT: Exemption upon acquiring properties intended for rehabilitation (initiating works within the statutory deadline) or upon the first subsequent sale;

• IRS / IRC: Deductions for rehabilitation expenses and reduced taxation on capital gains or rental income.

The Lisbon City Council, for instance, requires that formal recognition of the rehabilitation work be requested simultaneously with the permit application or prior notice—otherwise, the right to the tax benefit may be forfeited.

How to find out if your property is located in an ARU

Before buying, selling, or advancing an architectural project, verify whether the building is located within an ARU through:

• The urban planning department of the respective City Council;

• Interactive municipal zoning and GIS maps;

• The Housing Portal (IHRU — Portal da Habitação);

• A formal application for a Certificate or Location Map in an ARU from the municipality.

Step-by-step guide to securing incentives in an ARU zone

To access incentives without legal contingencies, follow this step-by-step roadmap:

1. Confirm Territorial Inclusion: Verify inclusion in the ARU and check whether an approved ORU is active;

2. Initial Conservation Inspection: Request an initial municipal site inspection prior to starting works to officially establish the baseline condition;

3. Architectural Design Development: Create a technical proposal focused on enhancing the existing structure. Read our article on architectural schematic design;

4. Early Tax Validation: Coordinate with tax advisors, architects, and the local council regarding eligibility for 6% VAT and IMI/IMT benefits;

5. Final Inspection & Certification: Upon completing works, request the final inspection proving the two-level conservation improvement and obtain the certificate for the Tax Authority;

6. Rigorous Document Archive: Keep copies of permits, drawings, statements of responsibility, itemized invoices, and official reports.

Urban rehabilitation and energy efficiency

A large share of Portugal’s building stock was built prior to modern energy performance and thermal comfort standards. Rehabilitation is an opportunity to optimize roof and facade insulation, install efficient window frames, enhance natural ventilation, and introduce low-energy climate systems—improving both energy rating and market value.

Efficiency must be built into sustainable buildings from the outset. To learn about technical assessment costs, consult our guide on ADENE fees and energy performance certificate costs.

Financing for urban rehabilitation

Beyond tax relief, dedicated financial instruments for urban rehabilitation and environmental performance are often available—such as programs managed under IFRRU or Environmental Fund grants. Before applying, verify program validity, eligible expenditure criteria, and technical project prerequisites.

If you plan to convert a historic property into hospitality accommodation, explore our guide on how to open a boutique hotel in Portugal. For residential blocks, learn how architecture creates value in multifamily housing.

MJARC Arquitetos’ approach to rehabilitation projects

At MJARC Arquitetos, rehabilitation always begins with a careful reading of the existing structure: structural elements, materials, Municipal Master Plan (PDM) framework, urban morphology, and the technical and legal feasibility of the intervention.

Projects such as the Cicioso Boutique Hotel (Évora), Riverside Condominium (Santa Comba Dão), and Torre Green View (Covilhã) demonstrate how repurposing existing structures delivers architectural value, environmental sustainability, and enduring financial return.

Common mistakes when investing in an ARU property

Before purchasing or starting works, avoid these common pitfalls:

• Assuming that being in an ARU automatically guarantees all tax benefits;

• Failing to check for an approved ORU and its specific modality;

• Applying 6% VAT without prior legal and tax validation;

• Skipping the initial municipal inspection request before beginning demolition;

• Starting site operations without complying with prior notice of site opening requirements;

• Disregarding statutory approval timelines detailed in how long a building permit takes in Portugal.

Frequently asked questions about ARU, ORU, and urban rehabilitation

• What is an ARU zone? It is an Urban Rehabilitation Area delimited by the municipality where an integrated intervention on buildings, infrastructure, and public spaces is deemed necessary.
• What is the difference between ARU and ORU? The ARU defines the territorial boundary to be restored. The ORU defines the strategic action plan, timeline, and management model for that area.
• Does an ARU property always qualify for 6% VAT? No. Applying the reduced rate requires strict compliance with the criteria under Item 2.23 of List I annexed to the VAT Code and appropriate municipal documentation.
• How do you obtain IMI exemption during rehabilitation? Exemption depends on fulfilling Article 45 of the EBF and demonstrating, through municipal inspections, an improvement in the building’s state of conservation by at least two levels.
• Is it worth buying a property in an ARU? Yes, provided it is supported by prior technical, urban planning, and tax assessments confirming constructive feasibility and applicable incentives.

Sources and legal framework consulted

• Decree-Law no. 307/2009, of October 23 — Legal Regime of Urban Rehabilitation (RJRU), as amended.
• Value Added Tax Code (CIVA) — Item 2.23 of annexed List I.
• Law no. 56/2023, of October 6 — Amendments to List I items under the VAT Code.
• Tax Benefits Statute (EBF) — Article 45 (Incentives for urban rehabilitation).
• Housing and Urban Rehabilitation Institute (IHRU) — Guidelines on financing programs and ARUs.

Note: The content of this article is for general informational purposes only and does not replace consultation with current legislation, specific municipal regulations, or professional advice from qualified architects, engineers, and tax consultants for specific cases.