Building a new house: do you need a permit in Portugal?

Independent site: we are not a public authority, and this is not legal or tax advice.

Building a new house needs a licence. Prior communication replaces it only where a detail plan, execution unit or subdivision already fixes alignments, heights, floor area and uses, or in a consolidated urban zone under the height rule.

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Answer

Licence

Prior communication instead

Prior communication replaces the licence only where a detail plan, execution unit or subdivision already sets the details, or in a consolidated urban zone with no cessions and a height no taller than the most common facade height on that stretch of street.

Council rules

Your council can add detail in its own building regulation where the law lets it, so ask before you start.

Legal basis

RJUE art 4(2)(c) and 4(4)(d) and (e), RJUE (Decreto-Lei 555/99) as republished in the Annex of Decreto-Lei 108/2026

Sources

data.dre.pt/eli/dec-lei/108/2026/05/29/p/dre/pt/pdf

Checked

2026-11-05