The short answer
Portugal had 723,214 empty homes at the 2021 census, about 12% of its 5.97 million dwellings, while house prices rose 17.6% in 2025, the largest jump the national statistics institute has recorded. Most of those homes are not stuck because of the building. They are stuck because of inheritance, co-owners who disagree or cannot be found, registries that do not match, debts and missing licences. Solve the people and the paperwork, and much of the stock can come back to market.
The Portuguese paradox
Two facts sit side by side. Demand is high enough to push prices to records. At the same time, roughly one home in eight is empty, and about 350,000 of the empty homes need work before anyone can live in them.
Building more is part of the answer. But a large share of good homes already exists. They are simply locked.
Eight reasons a home gets stuck
Inheritance: the family never divided the estate, a situation known in Portugal as herança indivisa.
Co-owners who do not agree, or who cannot be found, often because they live abroad.
Paperwork: the land registry and the tax records describe different properties.
Court cases, debts and seizures attached to the home.
Unpaid property tax.
Occupation by someone without the right to be there.
No licence to live in it.
Decay, made more expensive every year as the tax on vacant and derelict property rises.
Most cases combine two or three of these at once. That is why they last years: estate agents turn them down, and lawyers solve one piece at a time.
One real-shaped case
Picture a three-bedroom flat in Braga, worth around €280,000 and empty for six years. There are three heirs: one in Porto, one in Lyon, and one who refuses to sell. Around them sit a lawyer, an architect, the land registry, the tax office and the town hall. Eight parties, and nobody in charge.
Nothing about this is exotic. It is the typical case.
What unblocks it
The missing piece is coordination under one mandate. First, a diagnosis: what is blocking the home, what it is worth, and which documents exist. Then a roadmap reviewed by a lawyer before anyone sees it. Then an exclusive mandate, and a task force of lawyers, architects and surveyors that executes the plan in order.
On the other side, investors need to see a deal with no surprises. They need the audit and the plan, without learning the address until negotiation, so the owner is protected and the process is not bypassed.
Where AI helps, and where it must not
AI is good at the busy work: an intake conversation in Portuguese or English, reading the property registry extract and the tax record, and scoring what is solvable. It must not make decisions about money or law. Scores, roadmaps and dossiers stay drafts until a person approves them. A low AI score is never turned into a "no" for the owner.
That is the model behind Realization Portugal. The case study explains the owner and investor flows and the disclosure rules.