Affordable Housing Quotas in Portugal: Who Actually Pays

Affordable housing quotas in Portugal: who actually pays
Mário Centeno, Portugal's former finance minister, wants developers to set aside up to a quarter of the new homes they build for affordable housing. The idea sounds fair. The spreadsheet disagrees.
What was proposed
On CNN Portugal's "Trigo do Joio" (26 October 2026), Centeno defended an obligation for developers to allocate 20% to 25% of the homes they build to affordable housing, through subdivisions and building licences. Source: CNN Portugal
The affordable homes would not need to be on the same site as the licensed project.
He also called for a fast track in licensing, better coordination between central government and municipalities, and more pressure on those who obtain building rights and never build.
The math: one in four homes at a capped price
A developer builds four homes. One of them now sells at a capped price. That home is not free. The difference has to come from somewhere, and there are only three places: the other three buyers pay more, the land is bought cheaper (or the owner simply doesn't sell), or the project stops adding up and never happens.
Calling it "affordable housing" doesn't change the spreadsheet. It only changes who pays.
The contradiction is in his own numbers
Centeno himself points out that between 2008 and 2014 licensed buildings fell from 45,000 to 15,000, and completed homes from 65,000 to 11,000. His conclusion: the problem is supply. The proposed fix is one more obligation on the people who supply.
When a project stops adding up, it doesn't get cheaper. It just doesn't get built.
Where he is right
The fast track in licensing. A project stuck at the city hall for two years pays interest, insurance and IMI while it waits for a stamp. Fix that first. It costs nothing and obliges no one.
What it means if you buy or invest
Buying a new build: in a project with a quota, look hard at the price of the units without a cap.
Investing: run the deal with the quota in the numbers now. If it only works without it, you already have your answer.
FAQ
Who pays for an affordable housing quota? The capped homes cost the same to build. The gap is covered by the other buyers, by a lower land price, or by projects that never start.
Would quotas make homes cheaper? For the buyers who get a capped unit, yes. For everyone else, the risk is fewer projects and higher prices on the rest. Supply is what lowers prices, and a quota does not add supply on its own.
Opinion, not investment advice. Rules change: check the law in force with a lawyer before any decision.
About the author: Thiago Ibrahim is CFO and co-founder of Metal Ballerina (MB House of Investment), a Lisbon real estate co-investment company featured in Forbes Portugal.
More from Metal Ballerina: all articles at mbinvestpt.com/insights, the Portuguese edition on Substack (thiagoibrahim392041.substack.com), or write to mb@mbinvestpt.com.