Garden greenhouse: do you need a permit in Portugal?

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

A garden greenhouse (estufa de jardim) under 3 m high and no larger than 20 m² is exempt as a minor work. A bigger one needs a licence, or prior communication in the cases art 4 lists.

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Answer

Exempt if under 3 m high and 20 m² or less

Height

Less than 3 m

Area

20 m² or less

Bigger greenhouse

General rule: a licence (art 4(2)(c))

Before you start

Tell the council at least 5 days before work begins, even for exempt work (art 80-A).

Heritage exception

Minor-works exemptions do not apply to listed buildings, buildings in the protection zone of a listed building (window frames excepted), or buildings inside listed groups or sites (art 6-A(2)).

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 6-A(1)(c) and 4(2)(c), 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