Buying an older Algarve villa and bringing it up to spec is one of the most common value-add plays in Portuguese real estate. It is also one of the most underestimated.

The wrong permit category, an unlicensed contractor, or a missed energy certificate trigger can turn an 18-month plan into a 30-month one, and a clean budget into a series of unplanned spends.

This guide walks through how renovation is regulated in Portugal, what changed under Decree-Law 10/2024 (the Simplex Urbanístico), the permit categories and realistic timelines, the 6 percent VAT rule that most owners miss, and how to read the contractor market.

For the financial case for energy upgrades, see why energy efficiency sells in Algarve real estate and solar power and tax savings on Algarve property.

The legal framework: RJUE and what governs your works

Renovation in Portugal is governed by the Regime Jurídico da Urbanização e Edificação (RJUE), enacted under Decree-Law 555/99 and substantially amended over the years, most recently by Decree-Law 10/2024 of 8 January (Simplex Urbanístico).

The RJUE defines four categories of works:

• Obras de conservação (Maintenance work) – maintenance to keep the building in its original state

• Obras de alteração (Renovation work) – changes that modify internal layout, materials, or systems without altering external volume

• Obras de ampliação (Expansion work) – increases to footprint or volume

• Obras de reconstrução (Reconstruction work) – rebuild after demolition, with or without preserving the original footprint

The category determines which permit you need. Conservação is usually exempt or a simple prior notice; ampliação and reconstrução almost always require a full licence.

Permit types: isenção, comunicação prévia, licença de obras

Three permit regimes apply depending on scope:

• Isenção (exemption) – minor works with no impact on structure, façade, or use. No permit required, but record-keeping is recommended.

• Comunicação prévia (prior notice) – renovation without structural or external change. Decision window is 20 calendar days from submission. If the municipality does not oppose within that period, tacit approval applies and works may begin.

• Licença de obras (works licence) – structural change, expansion, reconstruction, or works in protected zones. Decision window is 60 to 90 calendar days. Complex projects or heritage-protected properties can extend to 4-8 months.

Heritage zones (zona histórica, imóveis classificados) trigger additional review by the relevant heritage body, such as the Direção-Geral do Património Cultural (DGPC) for nationally classified properties or the municipal heritage department. Add 2 to 6 months to the standard timeline.

What Decree-Law 10/2024 changed

The Simplex Urbanístico, in force from 4 March 2024, introduced 26 measures to reduce friction in the permit system:

• The licença de utilização (use permit) is eliminated when works have already passed prior control. The owner submits a closing dossier instead.

• Tacit approval applies more broadly. If the câmara municipal misses the legal deadline, the project is deemed approved.

• A centralised electronic platform handles submissions, status tracking, and supporting documents.

• The old Regulamento Geral das Edificações Urbanas (RGEU) is revoked on 1 June 2026 and replaced with a modernised version.

• Several layers of duplicate review are removed when the project is signed by qualified professionals (architect and engineer).

The reform speeds up timelines where the câmara is well-resourced and the project is clean. It does not remove the substantive rules on what you can or cannot do, which still come from the local Plano Director Municipal (PDM) and any urban plan specific to the area.

Algarve municipal landscape

Permit processing speed varies sharply across the Algarve:

• Lagoa and Lagos have the fastest average processing on standard renovation files.

• Portimão and Albufeira run slower, largely due to volume.

• Loulé and Faro fall in between, with heritage areas (Loulé old town, Faro centre) adding review time.

• Inland councils (São Brás de Alportel, Castro Marim, Alcoutim) tend to be faster but operate with smaller technical teams.

Before you commit to a property with renovation in mind, request a Pedido de Informação Prévia (PIP) at the câmara. The PIP confirms what is and is not permitted on a specific parcel under the current PDM, before you spend money on architectural drawings.

The 6 percent VAT rule you should not miss

The standard VAT rate on construction services in Portugal is 23 percent. A reduced 6 percent rate applies to renovation works on properties located in an Área de Reabilitação Urbana (ARU) with an approved Operação de Reabilitação Urbana (ORU).

The Supreme Administrative Court confirmed in Case no. 012/24.9BALSB of 26 March 2025 that both conditions are necessary: ARU location alone is not sufficient.

The reduced rate covers urban operations initiated between 23 September 2025 and 31 December 2029, with the regime in force until 31 December 2032.

For residential use within the housing policy framework, the acquisition price must be under €648,000 and the implied rent under €2,300 per month.

On a €300,000 renovation, the difference between 23 percent and 6 percent VAT is €51,000. The ARU/ORU question should be on your due diligence list before you sign the deed, not after.

Energy certificate (SCE) and the 2026 deadline

Under Decree-Law 101-D/2020, an energy certificate is mandatory for sale, rental, and for any rehabilitation intervention exceeding 25 percent of the building's value. EU Directive 2024/1275 must be transposed into Portuguese law by 29 May 2026, and will introduce:

• A renovation passport for low-rated properties

• Minimum energy performance standards for rental properties

• A harmonised A to G scale replacing the current A+ to F system

If your renovation crosses the 25 percent threshold, the energy certificate must be reissued after works. Material changes to insulation, glazing, heating, or cooling systems trigger the same requirement.

Fines for non-compliance run from €250 to €3,740 for individuals and up to €44,890 for legal persons.

Choosing contractors: alvará, references, contracts

Every contractor working in Portugal must hold a valid alvará issued by the Instituto dos Mercados Públicos, do Imobiliário e da Construção (IMPIC).

The alvará is classified by category and class, with classes scaling up by the value of works the contractor is authorised to deliver. Verify the alvará at the IMPIC public registry before signing.

Standard practice:

• Three quotes from licensed contractors with comparable scope

• Architect and engineer team retained directly by the owner, not by the contractor, to avoid conflicts of interest

• Written contract (contrato de empreitada) with payment milestones tied to delivery

• Performance bond or retained percentage held until final acceptance

• All invoices in your name with VAT properly itemised

The owner-as-client model is the cleanest structure for accountability and the standard among ICON Property buyers.

Realistic timelines

A substantial renovation of an Algarve villa typically runs:

• Design and licensing: 3 to 6 months (architect drawings, engineer specifications, permit submission and review)

• Tender and contract: 1 to 2 months (three quotes, negotiation, signing)

• Construction: 4 to 12 months for a 200-300 m² villa; 12 to 18 months for a larger or heritage property

• Final inspections and closing dossier: 1 to 2 months

Total from acquisition to handover: 9 to 22 months for a typical brief. Heritage properties or projects in saturated municipalities can stretch to 24 to 30 months.

Common mistakes that delay or kill projects

• Buying a property with undeclared extensions or illegal works visible on the caderneta predial but absent from the licença de utilização

• Skipping the PIP and discovering PDM restrictions only after closing

• Hiring an unlicensed contractor for a "cheaper" quote that produces no invoice and leaves you with no legal recourse

• Underestimating the energy certificate upgrade when intervention crosses 25 percent of value

• Ignoring the ARU/ORU framework and paying 23 percent VAT when 6 percent applied

• Not registering the contrato de empreitada with the câmara when required for licença files

For the language and terminology, our piece on Portuguese real estate terms explained covers the vocabulary most foreign owners get wrong on day one.

FAQ

How long does a renovation permit typically take in the Algarve?

Comunicação prévia: 20 days. Licença de obras: 60 to 90 days. Heritage cases: 4 to 8 months. Tacit approval applies when the câmara misses the deadline.

Can I renovate as a foreign owner without being resident in Portugal?

Yes. You need a Portuguese tax number (NIF) and a Portuguese bank account, and you typically appoint a Portuguese architect and engineer to lodge the file on your behalf.

Do I always need an architect?

Yes for any works requiring comunicação prévia or licença. No for works under isenção. The architect must be registered with the Ordem dos Arquitectos.

What if I buy a property with illegal extensions?

You inherit the problem. Options are: legalise via the câmara (cost and timeline depend on the deviation), demolish, or live with the risk of forced demolition. Always pull the licença de utilização and compare with the caderneta predial before signing.

How does the 6 percent VAT actually work?

Your contractor invoices at 6 percent only if the property is inside an ARU and there is an approved ORU covering it. You need a certidão from the câmara confirming both. Get it before the works start; retroactive correction is contentious.

Where ICON Property fits in

Renovation potential is one of the strongest reasons to buy in the Algarve, and one of the easiest things to misprice on viewing day.

Knowing which properties sit inside ARUs, which câmaras process files in 20 days versus 90, and which heritage zones add six months to any project is the difference between an investment that compounds and one that drags.

ICON Property guides buyers through the full renovation arc: pre-purchase PIP and ARU checks, introductions to licensed architects, engineers and contractors, and follow-through to handover.

Browse Algarve properties or talk to the team for a renovation-ready shortlist.