Buying an apartment in Portugal means buying not just the home: it means buying a share of the entire building, with shared rights, duties and costs. Three concepts are enough to understand what is being acquired.
The autonomous unit (fração autónoma)
It is the individual unit of a building under horizontal property: the apartment itself, with its identifying letter and, as a rule, the annexes that belong to it — garage, storage room. The constitutive title defines what belongs to each unit and what is a common part. Discrepancies between the title and reality (a garage used by another neighbour, an enclosed balcony) are a classic source of conflict and should be clarified before buying.
The quota (permilagem)
It is each unit's share of the whole building, expressed in thousandths. It serves two purposes: splitting common costs and weighting votes at the owners' meeting. A higher quota pays more condominium fees but decides more. The quota is in the constitutive title and can only be changed by agreement.
The condominium
It is the management of the common parts — stairs, roof, lift, façade — paid by all owners in proportion to the quota or by another criterion in the internal rules. Before buying, request and read:
- The latest meeting minutes: they reveal decided works, conflicts and the building's financial health;
- The monthly fee and the reserve fund, required by law for future works;
- The condominium rules, which may restrict uses, including short-term rental;
- Outstanding debts of the unit: overdue fees can follow the buyer.
What the roof has to do with the purchase
A leak in the roof of a building without a reserve fund can become an extraordinary levy of thousands of euros, charged months after the home was bought. The minutes reveal whether that scenario exists.
Before signing
- Confirm the unit's composition in the constitutive title.
- Know the quota and the cost-splitting criterion.
- Read the minutes of the last two years.
- Check the monthly fee and the reserve fund.
- Confirm the unit has no outstanding fees.