Off-market properties
The best property in the area is probably not on Idealista.
Portugal has a parallel property market — properties held in estates, under court proceedings, in tax arrears, or where owners are quietly open to an offer. They don't appear on any portal because they've never been listed. When launched, RealOS will map these signals. This page does not read them.
Off-Market Signal Mapper
When launched, you will be able to enter a municipality to see signal density. This page does not read public registries.
Coming soon
Tool in development
This tool is not available yet. The content below is informational and describes what it will measure when launched — not real results for your property or area.
The visible property market — Idealista, Imovirtual, Casa Sapo — represents properties where a seller has engaged an agent, paid to list, and is actively marketing. But a significant proportion of the Portuguese property stock is held by owners who never take that step: families with inherited properties caught in estate disputes, owners accumulating IMI arrears, and properties subject to court-ordered sales where no agent has been appointed.
These properties are not secret. Their status is recorded in public registries. The barrier is aggregation and language, not access. When launched, RealOS will read those sources. This page does not look them up.
The five off-market signal sources
Municipalities maintain a register of devolutos — properties formally classified as vacant. Under Lei 83/2019, municipalities with housing pressure can impose an AIMI surcharge on vacant properties, creating a financial incentive for owners to either sell or lease. When launched, RealOS will show the density of registered devolutos by parish. This page does not read municipal records.
Citius is Portugal's courts information system. Estate proceedings (heranças), insolvency cases (falências), and enforcement actions (execuções) involving real property are logged in Citius. A property in an active estate proceeding may be available for purchase — often at a discount — but the sale must navigate the legal process. When launched, RealOS will show Citius proceeding density by area. This page does not look up Citius.
Persistent IMI arrears are a reliable leading indicator of a motivated seller. AT (Autoridade Tributária) begins enforcement proceedings after 30 days of non-payment, escalating to a tax lien (penhora) that is registered on the Certidão Permanente. When launched, RealOS may flag penhoras by area. This page does not read the Certidão Permanente.
Where a property has been declared unsafe or in violation of building regulations, the Câmara Municipal can issue an obras coercivas order requiring the owner to carry out remedial works or face having the works carried out at the owner's expense. An owner facing a coercive works bill is almost always a motivated seller. When launched, RealOS may show obras coercivas orders. This page does not read municipal records.
BUPi (Balcão Único do Prédio) is Portugal's rural cadastral registration system. Large areas of rural Portugal have properties with unclear cadastral boundaries or incomplete registration. These properties are not always actively marketed because the documentation complexity discourages agents. Buyers who can navigate the legalisation process can access these properties at significant discounts.
The answers below describe what this tool will do when launched. It is not available yet.