Portugal Land Classification

National Ecological Reserve (REN): can you build on it in Portugal?

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Generally no: in the National Ecological Reserve (Reserva Ecológica Nacional, REN) subdivision, urbanisation, construction, extension, roads, earthworks and clearing are banned, except uses listed as compatible.

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Answer
Only the uses and actions listed in the regime's Annex II can go ahead.
Routes
Each listed use is exempt, subject to prior communication, or subject to authorisation.
Condition
The use must not harm the functions of the REN area.
Who decides
The regional development commission (CCDR) handles the prior communication or authorisation.
Public interest
Actions of relevant public interest can be recognised by joint order of ministers.
Overlap
If water-use titles, classified areas or RAN also apply, the CCDR runs one services conference.
Map
The REN municipal maps are in the DGT geoportal.
Legal basis
Decreto-Lei 166/2008, articles 20 to 24, as amended by Decreto-Lei 124/2019
Sources
files.diariodarepublica.pt/1s/2008/08/16200/0586505884.pdf
files.diariodarepublica.pt/1s/2019/08/16400/0006000118.pdf
dgterritorio.gov.pt/atividades/ordenamento/sgt/srup
Checked
2026-11-05

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