The first thing you notice, walking through the renovated wing of a 1960s housing block in Marvila, is that the floors don’t squeak. Then that the windows close. Then, slowly, that the corridors have been widened by ten centimetres at a time, in a way only an architect would think to do. The flat the IHRU has just handed over is forty-seven square metres for a single-parent household with two children. The rent, set under one of Lisbon’s income-indexed affordable-rental schemes, is a few hundred euros a month. The same flat, on the open market three streets away, would currently let for several times that.
This is the contradiction the new generation of Portuguese architects spends every working day inside. Lisbon needs more housing than it can build. The housing it has is the housing it needs to retrofit. The retrofit budget is finite and its deadline is fixed. The architects, many of them under forty, are being asked to design at a fraction of the unit cost a private developer would consider sane — and to do it well enough that the people who move in stay for thirty years.
How much rent is too much
The data on Lisbon’s housing crisis is by now boring in its consistency. By the official transaction-based figures kept at INE, the Instituto Nacional de Estatística, house prices across the Lisbon metropolitan area have climbed steeply since 2018, with greater Lisbon now well above the national average per square metre. Idealista’s asking-rent index, tracked monthly, has risen faster still; by 2025 the Lisbon region was renting at close to twenty euros per square metre. Wages did not keep pace. The Golden Visa programme, whose residential real-estate routes were finally retired for new applicants in October 2023 under the Mais Habitação package (Law 56/2023), had spent the previous decade channelling foreign capital into inner-city flats.
None of this is news to anyone who lives in Lisbon. What is news, slightly, is that the Portuguese state has begun spending money on the answer at a rate it had not seen for decades. The country’s NGEU-funded recovery plan, the Plano de Recuperação e Resiliência, carries a housing envelope of roughly €1.4 billion, aimed at delivering tens of thousands of public dwellings by the programme deadline. The broader State commitment to housing runs higher still. Most of the recovery money lands at the IHRU, the Instituto da Habitação e da Reabilitação Urbana, which then commissions the work, mostly by tender, to architectural offices.
The architects nobody invited to the magazines
The offices doing this work are mostly small. They are the kind of studio where the photocopier sits next to the espresso machine and the model of a forty-eight-unit retrofit competes for desk space with the model of a single-family house in the Alentejo. They take on selected social-housing tenders not because the work pays well — it doesn’t — but because the housing question is, at present, the only architectural question in Portugal with a political deadline attached to it, and that deadline concentrates the mind.
The tenders are tight. The IHRU works to cost-per-square-metre ceilings that leave little room for ornament. The interesting design moves are therefore unsentimental: a window orientation that catches the cross-breeze the Tagus pushes up the hill in summer; a stairwell wide enough for two people to pass each other with a pram; a kitchen designed so the single most expensive object in the flat — the cooker — can be replaced without dismantling the cabinetry. None of it photographs well. All of it matters to the person who has to live there for three decades.
The housing question is, for now, the only architectural question in Portugal with a political deadline attached to it.
Plano de Recuperação e Resiliência — Programa de Apoio ao Acesso à Habitação
Reabilitar para Arrendar
Two of the load-bearing instruments are Reabilitar para Arrendar, the IHRU’s long-running facility offering long-term, reduced-rate loans for the retrofit of buildings destined for accessible rental, and the 1.º Direito programme, the Programa de Apoio ao Acesso à Habitação, which co-finances local councils and others to resolve inadequate housing through rehabilitation, acquisition and construction. On the municipal side, the Câmara Municipal de Lisboa runs its own Renda Acessível scheme — allocating retrofitted and newly built units to qualifying residents by lottery, at rents set below the open market.
The municipal programme has survived a change of political colour. Carlos Moedas, the centre-right PSD mayor who took City Hall in 2021 from the previous Socialist administration, has shifted the language around it — less “social housing”, more “workforce housing” — without dismantling the underlying machinery. The waiting lists, by every account, dwarf the supply. Across its successive editions the municipal effort has reached a few thousand households; the demand it answers is an order of magnitude larger. That gap is the whole story, and everyone administering the programme knows it.
The neighbourhood as a design constraint
The architects are unanimous on the part of the work that doesn’t show up on the floor plans. A retrofit in Marvila, in Olaias, in Chelas — the bairros that ring the inner city — happens inside a community that is demographically settled, suspicious of architects, and deeply attached to the staircase neighbours its residents have known for decades. Whatever the drawing says, the building is already inhabited by relationships.
It is worth remembering that Portugal has been here before. After the Carnation Revolution, between 1974 and 1976, the Serviço de Apoio Ambulatório Local — the SAAL process, devised by the architect and then housing secretary Nuno Portas — sent architects, engineers and students into the poorest neighbourhoods to build with residents rather than for them. SAAL was repealed in 1976, after barely two years, when the revolutionary moment that produced it closed. It remains the country’s touchstone for participatory housing, and the standard against which the current generation, working inside tenders and cost ceilings rather than committees, quietly measures itself.
The lesson the offices draw from it is procedural rather than romantic: keep people in place where you can. Sequencing the construction so that families move between completed flats inside the same block, instead of being relocated to temporary housing on the city periphery, costs more in money and less in everything else. It keeps the staircase intact. The social arithmetic, the architects argue, comes out ahead even when the financial arithmetic does not.
The arithmetic that doesn’t close
Even the most generous reading of the current numbers does not close the gap. The combined IHRU and municipal output of affordable-rental units each year remains, by the institutions’ own accounting, well short of the metropolitan area’s annual demand. The recovery-plan funding stream, with its hard 2026 horizon, is the engine; what happens to the pace of delivery once that engine switches off is the question no one in the sector answers comfortably.
Architects and IHRU officials, in private, broadly agree on what would change the arithmetic. A larger and more durable fiscal envelope is the obvious answer. A faster regulatory pathway for retrofit — specifically, a way to move more quickly through co-ownership procedures inside condomínios when the state is the majority owner — is the less obvious one. And a standardised retrofit specification that can be tendered as a regional framework rather than building-by-building is, among the offices that have studied Vienna’s Sanfte Stadterneuerung, “gentle urban renewal”, the move that would actually compound over time.
What the flats feel like to live in
The single-parent household in Marvila, three months in, does the things people do in flats they intend to keep. They have hung the children’s drawings on the wall. They have rearranged the furniture twice. They have figured out which of the two windows catches the morning light and put the kitchen table under it. The mother, who works in the public health system, says the rent number is the first time in years she has been able to plan more than a season ahead.
The architect who designed the retrofit will not visit. Residents get the building, not the architect’s narrative about the building. There is something honourable in that and also something instructive. Lisbon’s housing programme, in its current form, only works because the people running it — civil servants, architects, ward councillors — have largely agreed not to be the protagonists. The protagonists are the families on the waiting list. The story will be told in the rents they actually pay, the friendships they actually keep, the children they actually raise in flats that, against the prevailing market, were built to be lived in for thirty years.
Whether the next administration of Lisbon City Hall, or the next of the República, keeps the implicit agreement to stay in the background is the open question. The Lei de Bases da Habitação, the 2019 framework law that declared housing a right and not merely a market good, gave the consensus a legal spine. The architects have done the design work. The state has, for once, found the capital. What is brittle is the political agreement that some things are infrastructure and some things are politics, and that this thing is infrastructure. In Lisbon, that agreement is young. So far, it has held.
Sources: Instituto Nacional de Estatística (INE); Idealista price index; Confidencial Imobiliário; IHRU (Instituto da Habitação e da Reabilitação Urbana) — Reabilitar para Arrendar and 1.º Direito; Plano de Recuperação e Resiliência (Portugal), Programa de Apoio ao Acesso à Habitação; Câmara Municipal de Lisboa (Renda Acessível); Lei de Bases da Habitação (Lei n.º 83/2019); Mais Habitação (Lei n.º 56/2023); SAAL / Serviço de Apoio Ambulatório Local (1974–1976); wohnfonds_wien, Sanfte Stadterneuerung.
