Building a Swimming Pool at Your Home in Portugal

Last verified: October 2026.

Who this is for

• Homeowners in Portugal planning to build a pool next to their house.
• Buyers who want to know what a pool adds to a home's yearly property tax.
• Owners of a house with land outside town who want to add a pool.

Not for you if: you only plan a shed, a wall, or solar panels. Read "Building Work You Can Do without a Licence in Portugal".

Yes, you must tell the council first. A pool next to your house usually needs a prior communication (comunicação prévia), not a full licence. You send plans online, pay the fee, and give 5 days' notice before work starts. There is no permit to wait for. Once the pool is finished, you have 60 days to tell the tax office (Finanças). A pool adds 0.06 to your home's quality and comfort factor, so a factor of 1.00 means a tax value 6% higher.

Do you need council permission?

The planning law lists a pool linked to a main building as work that needs a prior communication to the council (câmara municipal). It is not on the list of minor works you can do without telling anyone.

A prior communication is lighter than a licence. You declare the work, with the plans, and you can go ahead once you have paid the fees and given notice that work is starting. The council does not issue a permit first. It checks your papers afterwards instead. For up to one year after you pay the fees, it can decide the papers are not in order, stop the work, and order you to put things right.

When you may need a full licence instead. The law asks for a full licence, which the council must approve before you start, in some places:

• if your house is a listed building, or sits in the protection zone around one;
• if the land is under a public-interest restriction, such as the national farmland reserve (see below), unless a detailed local plan already covers it.

Portable pools. The law's definition of building covers structures fixed to the ground for good. An inflatable or frame pool that you put up for the summer and take down again is not usually built in that way. The law does not say this in so many words, though, and councils can set their own rules. Ask your council before you buy a large kit pool.

How to tell the council

1. Check your council's rules. Every council has a building regulation (regulamento municipal de urbanização e edificação) on top of the national law. It can add its own rules, for example on pool fences, and it sets the council's fees.
2. Have the plans drawn up. Your prior communication must include a signed statement from the people who drew up the plans that they follow the building rules. Only qualified professionals registered with their professional body can sign plans.
3. Gather the documents. Councils ask for a standard set. Albufeira's form, for example, asks for: - the access code for your land registry certificate (certidão permanente); - a location plan and extracts from the local plan maps; - a site plan showing the pool and any paved areas; - a written description of the project; - the architecture and engineering plans that apply; - map extracts of the farmland and ecological reserves, where no local plan covers the land.
4. Submit it online. The prior communication goes to the mayor (presidente da câmara) through the council's electronic planning platform. You state how long the work will take. You get an electronic receipt.
5. Pay the council fees. The council sets them in its own fee regulation. You have at least 60 days from submitting to pay.
6. Give notice that work is starting. At least 5 days before work starts, tell the council who will do the work. Put up a notice on site, visible from the street, by the same date.
7. Build what you declared. Your builder must follow the plans exactly.

Cascais council's own guidance gives the same answer: a pool next to your house needs a prior communication, with the plans attached.

What happens if you skip it

Starting work without first telling the council that work is starting is an offence. For a private person, the fine runs from €500 to €100,000. Building something different from the plans you submitted carries a fine of €1,500 to €200,000. The council can also order the work stopped.

How a pool changes your IMI

Your yearly property tax (IMI) is a percentage of your home's tax value (valor patrimonial tributário, or VPT). Finanças works out the tax value with a formula. One of its factors is quality and comfort. It starts at 1.00 and goes up or down with the features your home has.

• A private pool adds 0.06 to that factor. A shared pool in a development adds 0.03.
• For tax purposes, a pool is any tank for swimming that has equipment to circulate and filter the water.
• Every factor in the formula is multiplied together. So if your factor was 1.00, it becomes 1.06, and the tax value rises by 6%.

An example. A house with a tax value of €150,000 and a factor of 1.00 would rise to €159,000. Councils charge 0.3% to 0.45% a year on most homes. At 0.3%, the pool adds €27 a year to the bill. At 0.45%, it adds €40.50.

You must declare the pool. The law gives you 60 days after the work is finished to file the property declaration (Modelo 1 do IMI). The form has boxes for quality and comfort features. You attach the final plans approved by the council. If you do not declare, Finanças can update the record itself.

For how the bill is paid, read "Paying IMI Property Tax in Portugal".

Pools on farmland and rural plots

Much of rural Portugal sits in the national farmland reserve (Reserva Agrícola Nacional, or RAN). The law calls it a public-interest restriction. On reserve land:

• non-farming uses are allowed only in a short list of cases, and only where there is no workable alternative outside the reserve;
• any work that needs a prior communication or a licence first needs a binding opinion from the regional reserve body, which has 20 days to give it.

Your council's plan maps show whether your plot is in the reserve. Check this before you pay for plans. Your council can also tell you about other restrictions on the land.

Filling the pool in a drought

The national water agency (APA) lists filling pools as an outdoor water use that water suppliers can ban or limit in a drought. Its advice to households in a drought is simple: do not fill tanks or pools. Ask your water supplier or council whether any limits apply in your area before you fill a new pool.

APA's water-saving advice for pool owners is to:

• cover the pool when you are not using it, to cut evaporation;
• recirculate and treat the water rather than replace it;
• check the pool for leaks from time to time, and avoid overflow when you wash the filters;
• top it up with stored rainwater where you can.

Keeping children safe

The national emergency medical service (INEM) says the best way to prevent drowning is to control access to the water. For a private pool, it advises you to:

• put a fence all the way round the pool, with a latch that closes on its own;
• watch children whenever they are near the water, and put armbands or a life vest on any child who cannot swim;
• never leave a young child alone in or near the pool, or in the care of an older child;
• teach children to swim as early as you can.

Some councils make fences a rule. Loulé's building regulation, for example, says pools must meet the Portuguese safety standards for fences and for protecting access to the water. Ask your council what applies where you live.

This guide is general information, not legal or tax advice. Rules vary from council to council, so check with yours before you build.

Sources

This guide is written from official sources and, where relevant, organisations' own websites.

• Procuradoria-Geral Regional de Lisboa, Regime Jurídico da Urbanização e da Edificação (Decreto-Lei n.º 555/99), consolidated text, articles 2, 3, 4, 6-A, 10, 34, 35, and 80-A (definition of building, council regulations and fees, pools need prior communication, licence cases, minor works, signed statement by plan authors, how a prior communication works, one-year check, start-of-works notice) (Portuguese only; includes the changes made by Decreto-Lei n.º 108/2026)
• Procuradoria-Geral Regional de Lisboa, Regime Jurídico da Urbanização e da Edificação (Decreto-Lei n.º 555/99), consolidated text, article 98 (offences and fines) (Portuguese only)
• Autoridade Tributária e Aduaneira, Código do IMI, article 43 (quality and comfort factor, private and shared pools, definition of a pool) (Portuguese only)
• Autoridade Tributária e Aduaneira, Código do IMI, article 38 (tax value formula) (Portuguese only)
• Autoridade Tributária e Aduaneira, Código do IMI, article 13 (60 days to declare finished works; Finanças can update the record itself) (Portuguese only)
• Autoridade Tributária e Aduaneira, Código do IMI, article 112 (rates for urban property) (Portuguese only)
• Autoridade Tributária e Aduaneira, Modelo 1 do IMI, filling-in instructions (quality and comfort boxes, plans to attach) (Portuguese only)
• Câmara Municipal de Albufeira, Comunicação prévia, obras de edificação (form and list of documents) (Portuguese only; one council's form, others vary)
• Câmara Municipal de Cascais, Posso construir uma piscina associada ao meu imóvel sem obtenção de parecer ou autorização prévia da Câmara Municipal? (Portuguese only; dated March 2013, cites an older numbering of the law)
• Município de Loulé, Regulamento Municipal de Urbanização e de Edificação, Regulamento n.º 884/2024, article 82 (pool fences and access) (Portuguese only; Loulé's own rule)
• Procuradoria-Geral Regional de Lisboa, Regime jurídico da Reserva Agrícola Nacional (Decreto-Lei n.º 73/2009), consolidated text, articles 2, 22, and 23 (Portuguese only)
• Agência Portuguesa do Ambiente, Programa Nacional para o Uso Eficiente da Água, 2012 to 2020 (pool water saving; drought limits on filling pools) (Portuguese only)
• INEM, Recomendações para Prevenir Afogamentos, 17 August 2023 (Portuguese only)

Last verified October 2026. Rules and fees change; check the official source before acting.