Renovation permit process in Portugal: how it works and when to start

Do you need a permit for your renovation?

Portuguese law sorts works into three broad bands: exempt works, works that need a prior communication, and works that need a full licence. Which band applies depends on the work and on local rules such as the PDM (municipal master plan) and heritage zones.

Our no-permit guide lists what you can do freely, and the permit overview explains the bands. Note that parts of the older guide were written before the October 2026 reform, so use this page for the current process.

Which route applies after the October 2026 reform?

With a prior communication, the project is filed and the câmara checks it within a fixed period. You can start work once the conditions are met, with no formal licence document first. The reform also shortened the period in which a municipality can control a finished work to one year.

The entry into force was postponed once, by DL 155-B/2026, and some municipalities are still adapting their forms. Ask the câmara which route your case follows rather than relying on a general rule.

What are the steps from first drawing to start of work?

Each step has its own owner. The architect leads the first three, engineers handle structure, electrical and plumbing where required, and the contractor handles the start-of-work paperwork.

1. 01
   Survey the property

   An architect measures the building and compares it with the plans on file at the câmara. Gaps are found here, before any money is spent on works.

2. 02
   Prepare the architecture project

   The architect draws the existing and proposed layouts. For simple works this can take a couple of weeks.

3. 03
   File with the câmara

   The architect submits the project, usually through the municipal portal, under the comunicação prévia or licence route.

4. 04
   Add specialty projects

   Structure, electrical, gas, thermal and acoustic projects are added where the works require them.

5. 05
   Start of work

   Once cleared, the contractor, who must hold the right alvará for the value of the works, notifies the start and the site can open.

How long does the permit stage take in total?

The statutory câmara period is only part of the story. Drawing the project, collecting specialty reports and answering the câmara questions often take longer than the formal deadline. This is a planning estimate from our own experience, not a legal guarantee.

In Lisboa, Cascais and Sintra, heritage zones and parish rules can add time. Ask your architect for a realistic range for your municipality.

What does the permit stage cost?

Fees vary by câmara and by project size. Ask the architect for a written fee proposal, and confirm what is included: drawings, filing, answering the câmara, and site supervision.

If you plan energy upgrades alongside the renovation, check whether an energy certificate is needed. Our energy upgrades guide covers the ADENE fees.

When should you start the permit process?

A common mistake is to sign with a builder first and file later. If the route turns out to need a full licence, the schedule slips and the builder may reprice. Ask all three contractors to quote on the same filed scope instead.

Check that the contractor holds the right alvará. See what is an alvará for how to verify it against IMPIC records.

Frequently asked questions

Conclusion

The permit stage is where renovations in Portugal are won or lost. The October 2026 reform made the default route faster, but the architect drawings and the specialty reports still set the real schedule.

Confirm the route with the câmara, start the survey early and make every contractor quote the same filed scope.