Building a pool around Lisbon: from first sketch to first swim

How building with the Pools Portugal Network works

Pools Portugal coordinates turnkey pool construction in Greater Lisbon and the Silver Coast, from Caldas da Rainha to Setúbal. The build is carried out by vetted builders from the Pools Portugal Network; we handle project coordination, follow the works, start the pool up and maintain it afterwards with our own team. Project follow-up is available in English.

Most builders hand over the pool and move on to the next job. That is exactly when problems start: water that never settles, equipment set up wrong, a leak nobody wants to own. We turn that around — our own team will be looking after this pool for years, so we have every reason to make sure it is built properly.

For each project we pick the specialist in the Network with experience of that pool type and that ground — sprayed concrete on a Sintra hillside is a different job from a fibreglass pool in an Oeiras garden. You deal with one contact from the first call to the first maintenance visit.

How much does it cost to build a pool in Portugal?

Around Lisbon, an 8 × 4 m in-ground pool costs roughly €30,000–€50,000 in concrete and €20,000–€32,000 in fibreglass, turnkey, with filtration, lighting and coping. Rock in the ground, heating, an automatic cover and decking are extras that can add €10,000–€30,000.

What moves the price most is not the pool type but the ground: rock can add €1,500–€10,000, especially in Sintra and around Arrábida, and a narrow access means smaller machines and more days on site. The calculator in the cost guide gives an estimate with the extras you want.

The build stages, from site visit to first swim

An in-ground concrete pool typically takes 8–12 weeks on site, plus 3–6 weeks of design and the prior notice to the municipality. A fibreglass shell goes in within days once the excavation is ready. To have it ready for summer, works should start by March.

1. 1

   Free project study

   1–2 weeks

   Site visit or video call: dimensions, access, soil, plant-room position and a reference budget. We also check whether your municipality requires a prior notice or a full licence.

2. 2

   Design and fixed quote

   2–4 weeks

   The Network specialist defines the build method and equipment; you get an itemised quote, line by line, with payments tied to completed stages.

3. 3

   Prior notice to the câmara

   1–3 weeks

   The responsible technician files the prior notice (comunicação prévia), the fees are paid and the start of works is notified. In protected areas a full licence and external opinions may be needed, which takes longer. See the permits and property-tax guide.

4. 4

   Construction

   8–12 weeks

   Excavation, structure, plumbing, waterproofing and finish. You receive a weekly photo report — especially useful if you live abroad.

5. 5

   Start-up by our team

   1 week

   Filling, balancing the water chemistry, setting up the pump, filter and heating, and a walk-through of the equipment.

6. 6

   Maintenance

   ongoing

   The same team that started the pool keeps it in shape with regular visits. See our maintenance plans.

Concrete, block, fibreglass or panels: which pool to choose?

Reinforced concrete is the most common choice in Portugal and the only fully bespoke one; fibreglass is the fastest and usually the cheapest up to about 9 m; concrete block with a reinforced liner and steel-panel kits sit in between, with standard shapes and a good finish.

What is inside a pool

Below the water there are several layers, and the quality of each decides whether a pool lasts 10 years or 40. The figure below shows a section through a concrete pool, with the water circuit to the plant room.

Waterproofing is the layer you never see and the one that prevents the most trouble: a poorly sealed pool can lose thousands of litres a week with no visible sign. Always ask which waterproofing system will be used and whether it carries its own warranty.

The plant room is the heart of the pool. Pump and filter sizing, chlorine versus salt, and the heating choice decide what you will spend on electricity and chemicals every year.

Do you need planning permission for a pool in Portugal?

Yes, but usually not a full licence: building a pool attached to a house requires a prior notice (comunicação prévia) to the municipality (article 4(4)(j) of the RJUE, Portugal's building-permit code). Since 1 October 2026 (Decree-Law 108/2026), you can start works once you file it, pay the fees and notify the start of works. Protected areas may require a licence.

Building without the right procedure can mean a fine, a stop-work order and problems when you sell. A pool also raises the property's tax value and therefore your IMI (property tax). We explain it all, municipality by municipality, in the permits and property-tax guide.

How to choose a pool builder in Portugal: 10 questions

Before signing, get at least three itemised quotes and check the builder's licence, insurance, past projects you can visit, a written warranty and a payment schedule tied to stages. These are the questions we ask every builder that joins the Pools Portugal Network.

1. Do you hold a valid construction licence (alvará) or registration with IMPIC for this type of work?
2. Are your liability and workers' accident insurance up to date?
3. Can I visit or call two clients with similar pools built in the last three years?
4. Does the quote itemise excavation, structure, waterproofing, finish, equipment and coping?
5. Who prepares the design and the municipal application, and is it included?
6. What happens if you hit rock? What is the price per cubic metre?
7. Which waterproofing system do you use, and what warranty does it carry?
8. What is the payment schedule — and is each payment tied to a completed stage?
9. What is the written warranty? (For long-lasting buildings, the Portuguese Civil Code makes the contractor liable for defects for five years.)
10. Who starts the pool up, and who shows me how to use the equipment?

Checking a builder's licence takes a minute. IMPIC, the Portuguese construction regulator, runs a public search of licensed construction companies at impic.pt. All you need is the company name or tax number (NIF).

Where we build — and what changes from area to area

We work from Caldas da Rainha, Óbidos and Torres Vedras in the north, through Mafra, Sintra, Cascais, Oeiras and Lisbon, down to Almada, Seixal, Sesimbra, Palmela and Setúbal in the south. Ground conditions and rules vary a lot across the region:

Living abroad? Follow your build from home

Many of our clients own a second home here. For them we run the build so nothing depends on being on site: video calls for the key decisions, weekly photo reports, and the responsible technician handles the municipal application under a power of attorney (procuração). After the build, our team keeps the pool ready for when you arrive.