The new building permitting rules in 2026
For decades, building or refurbishing in Portugal meant long waiting periods. The reforms of 2024 and 2026 — with Decree-Law n.º 108/2026, in force on 3 August — changed that model: the municipality controls less at the entry point, decides within shorter deadlines, and technical responsibility shifts to the designer. Here is what that means, concretely.
In short
- Works starting earlier — under prior notification, with fees paid, there is no more waiting for a decision.
- Deadlines with consequences — 30 days to assess the architecture; the municipality’s silence counts as approval.
- More security in the property — the permit consolidates after 3 years and the planning title now appears in deeds.
- Greater technical responsibility — the rigour of the design is your main protection.
1. Works can start earlier
For works in areas with planning rules already defined — detailed plan, subdivision, PDM parameters — the procedure becomes prior notification without a screening (preliminary-check) phase: your architect submits the design, the fees are paid, the start date is notified and the works begin. No months waiting for a decision.
The counterpart is serious: if the design breaches the rules, the municipality can act through inspection — during and after the works. Freedom at the entry point is paid for with technical rigour.
1 · DESIGN
designer’s statement of responsibility
2 · FEES
submission and payment
3 · WORKS
can start immediately
Prior notification from 3 August 2026: three steps, no waiting for a decision.
2. Short deadlines — and silence playing in your favour
In permit procedures, decision deadlines shorten: 20 days for the preliminary check, 30 days for the assessment of the architectural design (extendable once), 20 days for the final deliberation. And if the municipality does not respond, tacit approval forms — with the proof of submission counting as an element of the title.
For works that conform to the plan, waiting for a decision is over.
3. More security when you buy or sell a home
Two changes directly protect your assets. First, the period for the administration to declare a permit null drops from 10 to 3 years — after that period, the situation consolidates. Second, deeds must now state whether the property holds a planning title — fewer surprises for buyers, more value for sellers with the process in order.
After three years, the permit consolidates in the legal order — whoever buys or sells a permitted property now knows, in the deed, exactly what they can count on.
Source: Decreto-Lei n.º 108/2026, of 29 May — Diário da República
4. The technical rules changed hands
Since 1 June 2026, the old RGEU — the 1951 regulation that defined everything from minimum ceiling heights to corridor widths — is revoked. Until the Construction Code enters into force, it is the professional bodies that define the technical rules for designs. We explain everything in the article on the end of the RGEU.
“The municipality now trusts the designer. The client should demand that the designer deserves that trust.”
Tiago R. Correia
Architect
5. What this demands of your design
In a system where the State trusts the professionals, your architect is no longer just the author of the drawings: they are the legal guarantor of the operation — answering for the planning framework, the technical conformity and the complete preparation of the application. That is the difference between works that move forward and works that stop. See how we work in our permitting service.
Want to know the route — and the cost — for your specific case? Start with the complete 2026 permitting guide.
The mistakes that delay the process
Applications that stall almost always repeat one of three mistakes. Incomplete preparation — a missing drawing, statement or certificate, and the improvement request sends the application to the back of the queue. Wrong route — submitting through prior notification what required a permit (or the reverse) leads to outright rejection. Starting without confirming the exemption — “exempt works” does not mean works without rules, and successive inspection is real. All three are avoided the same way: a technical assessment before touching a wall.
Frequently asked questions
Do I need a permit to refurbish the interior of my home?
As a rule, no — interior alterations that do not touch the structure, the façades or the building height are exempt from prior control. In listed buildings or protection zones, the exemption does not apply: always confirm before starting.
How long until I can start the works?
It depends on the route: under prior notification, from 3 August, works start once the fees are paid; under a permit, the decision on the architecture now has a 30-day deadline, extendable once.
What exactly is prior notification?
It is the route for works in areas where the rules are already defined in a plan: the designer assumes conformity through a statement of responsibility and the municipality controls afterwards, not before. We compare the two routes in this article.
And if the municipality simply does not respond?
Silence now counts as tacit approval within the legal deadlines — and the proof of submission becomes part of the planning title. Keeping proof of submission has become essential.
Building, extending or refurbishing in 2026?
Tell us what you have in hand. We analyse your case’s framework and tell you the route, the real timelines and the costs — before you spend a euro on the works.
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