In a real estate acquisition, legal and tax due diligence is now routine. Urban planning due diligence, surprisingly, still is not. And yet, in many projects, it is the layer that truly determines whether the deal makes sense.
Beyond the land registry
A registry and tax records analysis confirms who the owner is and what the formal description of the property is. It does not confirm what can be done with it. That answer lies elsewhere — in land management instruments, in the municipal planning history and in the consistency between cadastre, tax records, registry and physical reality. This is where urban due diligence comes in.
Five essential checks
1. Land classification and zoning. The Municipal Master Plan and any detailed plans in force define the land category (urban, rural) and its operative zoning. From this framework derive the permitted floor area ratio, maximum building height, allowable uses and, ultimately, the feasibility of the intended project.
2. Easements and public utility restrictions. REN (National Ecological Reserve), RAN (National Agricultural Reserve), water domain, aeronautical, military or heritage easements — these constraints do not appear in the land registry, but can render part or all of the transaction unviable. Cross-referencing with thematic maps is unavoidable.
3. Consistency between cadastre, tax records and registry. Diverging areas, boundaries and configurations across these three layers are more common than one might expect. With the implementation of the National Cadastral Information System, cadastral regularisation has become a critical prior step for many transactions.
4. Municipal planning history of the property. Previous licensing processes, prior notifications, enforcement orders, urban planning infractions, reinstatement orders, urbanisation agreements — all of this liability follows the property and may jeopardise future applications. Requesting and reviewing the property’s history from the local council is an exercise one rarely regrets.
5. Pre-existing structures. Prior constructions may be lawful, tolerated or unlawful. The correct classification determines whether or not there are acquired rights to be preserved, and opens — or closes — pathways to regularisation.
When to conduct it and who should do it
Ideally, before the promissory contract. Alternatively, with clear conditions precedent that protect the buyer should the urban due diligence reveal material risks. Urban due diligence is not a matter of reading plans in isolation — it requires dialogue between a lawyer, an architect and, where applicable, a civil engineer. It is a multidisciplinary exercise by nature.
IMOLEGAL supports investors, developers and family offices in urban due diligence and in the feasibility assessment of real estate projects in Portugal. To discuss a specific case, contact our team.