The delimitation of an ARU also produces concrete legal effects: it requires the municipality to define local support measures and tax incentives for rehabilitation<\/a>, such as reductions or exemptions from Municipal Property Tax (IMI) or Municipal Property Transfer Tax (IMT).<\/p>\n In summary, an ARU identifies priority areas for urban rehabilitation and provides the legal framework to attract public and private investment.<\/p>\n An ORU consists of the set of planned interventions within an ARU. If the ARU identifies where<\/em> to act, the ORU explains how<\/em> to act within that territory. It defines the types of works to be carried out (for example, fa\u00e7ade rehabilitation, modernisation of building systems, upgrading of streets and public spaces, installation of lifts, etc.), who is responsible for their execution (private owners, the municipality, or public\u2013private partnerships), and the applicable deadlines.<\/p>\n The approval of an ORU\u2014usually through a municipal instrument or a specific detailed plan\u2014structures and programmes interventions in a coordinated manner. Through the ORU, property owners are informed of the incentives available to them, and municipalities ensure that works comply with a single, integrated plan.<\/p>\n The creation and operation of ARUs and ORUs are governed by the Legal Regime of Urban Rehabilitation (Regime Jur\u00eddico da Reabilita\u00e7\u00e3o Urbana \u2013 RJRU), approved by Decree-Law no. 307\/2009 of 23 October. This framework was subsequently amended and republished by Decree-Law no. 66\/2019 of 21 May, which updated management procedures, strengthened planning instruments, and clarified associated tax effects.<\/p>\n Under the RJRU, urban rehabilitation is defined as an integrated intervention in the existing urban fabric, preserving urban and real estate heritage while modernising it through construction, reconstruction, extension, alteration, conservation, or demolition works, as well as improvements to infrastructure and collective facilities.<\/p>\n The delimitation of an ARU and the approval of the corresponding ORUs fall within the competence of the Municipal Assembly, upon proposal by the Municipal Council, in accordance with Article 13 and subsequent provisions of the RJRU. The proposal must include:<\/p>\n a descriptive and justificatory report;<\/p>\n<\/li>\n a map defining the territorial boundaries;<\/p>\n<\/li>\n a framework of associated tax benefits.<\/p>\n<\/li>\n<\/ul>\n The ORU project must also include the strategic urban rehabilitation programme, the management model, the execution period, and the investment plan, pursuant to Articles 20 to 22 of the RJRU.<\/p>\n ARUs and ORUs provide several advantages:<\/p>\n These benefits are based on the Tax Benefits Statute (Articles 45, 45-A, and 71) and on the Financial Regime of Local Authorities (Law no. 73\/2013, Article 16), which allows municipalities to approve IMI and IMT exemptions within ARUs.<\/p>\n IMI:<\/strong> Exemption for three years, renewable up to five years, for rehabilitated properties located in an ARU (Article 45 of the EBF).<\/p>\n<\/li>\n IMT:<\/strong> Exemption on the acquisition of properties intended for rehabilitation, provided works begin within a maximum period of three years. Exemption also applies to the first transfer after rehabilitation when intended for permanent rental or, if located in an ARU, for owner-occupied permanent housing (Article 45-A of the EBF).<\/p>\n<\/li>\n<\/ul>\n Investors may access special credit lines. IFRRU 2020 \u2013 the Financial Instrument for Urban Rehabilitation and Revitalisation \u2013 provides loans at reduced interest rates for comprehensive building rehabilitation projects located in ARUs. This financing also covers energy efficiency measures. IFRRU has already mobilised hundreds of millions of euros to revitalise cities, particularly supporting housing rehabilitation and the reuse of deactivated industrial spaces.<\/p>\n Rehabilitation improves safety, comfort, and the aesthetic quality of historic neighbourhoods, attracting residents, commerce, and services. Renovated properties gain market value, benefiting owners and investors alike. At a local level, rehabilitation works generate employment in construction and related sectors. In degraded areas, rehabilitation helps prevent urban depopulation and reduces structural safety risks.<\/p>\n Projects within ARUs promote social inclusion and community cohesion. In more disadvantaged areas, rehabilitation contributes to economic revitalisation and job creation, helping to combat poverty. Rehabilitated neighbourhoods generally become safer and more pleasant places to live, improving overall quality of life. As stated by IFRRU, such investments act as \u201ca lever for urban sustainability and for improving people\u2019s quality of life\u201d.<\/p>\n Several municipalities have successfully implemented ARU\/ORU frameworks:<\/p>\n Lisbon:<\/strong> Since 2012, a large part of Lisbon\u2019s historic centre has been designated as an ARU. In 2024, the Municipal Assembly extended the duration of Lisbon\u2019s Urban Rehabilitation Operation by up to 15 years, allowing continued interventions in the city centre. As a result, neighbourhoods such as Baixa, Alfama, and Gra\u00e7a have benefited from conservation and modernisation works supported by incentives, attracting new residents and strengthening local commerce.<\/p>\n<\/li>\n<\/ul>\n Source<\/span>: https:\/\/www.lisboa.pt\/temas\/urbanismo\/reabilitacao-urbana\/area-de-reabilitacao<\/span><\/p>\n <\/p>\n Porto:<\/strong> The Municipality of Porto has defined several ARUs\/ORUs covering historic neighbourhoods. These operations introduce tax benefits for private rehabilitation and coordinate public investment. Areas such as Rua de Santa Catarina and its surroundings have undergone rehabilitation, benefiting from IMI exemptions and support for fa\u00e7ade upgrades. The municipal company Porto Vivo has coordinated these projects, revitalising historic areas while preserving heritage.<\/p>\n<\/li>\n<\/ul>\n s<\/span>Source: https:\/\/portaldomunicipe.cm-porto.pt\/documents\/20122\/1331869\/3_Relatorio_ARU_BAIXA.pdf\/7ace365f-9151-7c96-3ca7-91f92ccb98ab?t=1715680005479<\/span><\/p>\n Amarante:<\/strong> After identifying degradation in its historic centre, the Municipality of Amarante designated four Urban Rehabilitation Areas in 2009. This enabled the application of local incentives and the alignment of rehabilitation projects for squares, streets, and historic buildings. As a result, parks and gardens were renovated and historic fa\u00e7ades restored, making the city more attractive to residents and visitors.<\/p>\n<\/li>\n<\/ul>\n <\/p>\n Source: https:\/\/portaldomunicipe.cm-porto.pt\/documents\/20122\/1331869\/3_Relatorio_ARU_BAIXA.pdf\/7ace365f-9151-7c96-3ca7-91f92ccb98ab?t=1715680005479<\/a><\/span><\/p>\n <\/p>\n Many other municipalities across the country have followed this approach, often combining municipal planning, public funding, and owner incentives, frequently supported by European funds<\/p>\n To take advantage of ARU\/ORU incentives, owners or investors must follow several steps regulated by Articles 24 to 32 of the RJRU:<\/p>\n Confirm whether the property is located in an ARU:<\/strong> The first step is to verify whether the building lies within a designated area. The Housing Portal<\/a> provides an online tool to consult active ARUs by municipality.<\/p>\n<\/li>\n Plan the intervention as urban rehabilitation:<\/strong> When applying for a building permit, the project must be identified as urban rehabilitation and aim to improve the property\u2019s conservation status by at least two levels. Once works are approved, the municipality issues an official \u201crehabilitation recognition\u201d document, which is then communicated to the tax authorities to activate fiscal benefits.<\/p>\n<\/li>\n Apply for tax incentives:<\/strong> With the approved project and official recognition, the owner applies to the tax authorities for IMI and IMT benefits. Depending on the ARU, full exemption or reduced municipal rates may apply.<\/p>\n<\/li>\n Access financing and support programmes:<\/strong> Investors and developers may apply for IFRRU 2020 or other rehabilitation programmes, subject to specific requirements, including coordination with the municipality and compliance with eligibility criteria.<\/p>\n<\/li>\n<\/ol>\n In summary, close coordination with the local authority and housing-related institutions is essential. Contacting the municipal planning department, consulting IHRU\/IFRRU guidelines, and preparing a technically sound project are key steps to successfully benefit from available incentives.<\/p>\n Urban Rehabilitation Areas (ARU) and Urban Rehabilitation Operations (ORU) are powerful instruments for the recovery of Portugal\u2019s urban fabric. They enable large-scale coordinated interventions, combining private and public works while attracting investment through tax incentives and accessible financing. As a result, historic neighbourhoods become safer and more liveable, contributing to job creation and urban vitality. As highlighted by the IFRRU programme, investment in urban rehabilitation acts as \u201ca lever for urban sustainability and for improving people\u2019s quality of life\u201d. In practical terms, ARUs and ORUs transform degraded heritage into valuable assets, promoting economic and social development in Portuguese cities.<\/p>\n If you require an architectural project for urban rehabilitation<\/a>, please contact MJARC<\/strong><\/a> and request a quotation.<\/p>\n The information above is based on the Portuguese legal framework for urban rehabilitation, official guidance from the Housing Portal and IFRRU, publications in the Di\u00e1rio da Rep\u00fablica<\/em>, and practical examples from municipalities such as Lisbon, Porto, and Amarante.What is an ORU?<\/h2>\n
Legal Framework of ARU and ORU<\/h2>\n
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Benefits for Owners, Investors, and Communities<\/h2>\n
1. Tax Benefits<\/h3>\n
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2. Facilitated Financing<\/h3>\n
3. Urban and Economic Value Enhancement<\/h3>\n
4. Social Impact<\/h3>\n
Practical Examples in Portugal<\/h3>\n
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![\"Delimita\u00e7\u00e3o](\"https:\/\/mjarc.com\/wp-content\/uploads\/2025\/12\/Aru-Baixa-Porto-1000x766.webp\")
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![\"Delimita\u00e7\u00e3o](\"https:\/\/mjarc.com\/wp-content\/uploads\/2025\/12\/ARU-Amarante-1000x927.webp\")
<\/p>\nHow to Benefit from ARU\/ORU Incentives<\/h2>\n
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Conclusion<\/h2>\n
Sources and Legal References<\/span><\/h4>\n
\n<\/span>This information does not dispense with consultation of the applicable legislation, namely:<\/span><\/p>\n