Idealista Q1 2026 Report Counts Fewer Than 40,000 Homes Under €300,000 on the National Market — Affordable-Segment Supply Shrinks 31% in Twelve Months as IMT Jovem Demand Concentrates

Idealista's quarterly Q1 2026 supply-side report on the Portuguese property market, published on 10 June, marks the affordable segment of the residential inventory at its tightest reading in the seven-year history of the portal's national supply series. Only roughly one in three of the homes advertised for sale across the country sits below the €300,000 ceiling — the price point Idealista's economists identify as the upper end of what a median resident household can finance through a 30-year mortgage at the current Euribor 3-month curve of 2.37%. Stock in that affordable segment has fallen by 31% over the past twelve months, leaving fewer than 40,000 properties advertised nationally — a low that compares with around 58,000 in mid-2025 and roughly 84,000 in mid-2023.

The headline national-supply collapse is composed of two distinct dynamics. The first is the continuing top-end concentration of new listings: the volume of advertised apartments across the whole national market shrank by 19% in the twelve months to March 2026, settling slightly above 100,000 properties, while the share of those listings priced above €400,000 climbed from 38% to 47% of the inventory. The second is the rapid absorption pace inside the under-€300,000 band — properties in that segment stay on the Idealista portal for only 80 days on average in Q1, compared with 132 days a year earlier and roughly 190 days in the post-pandemic 2023 cycle. Where the affordable inventory exists, it clears in three months, and the median number of advertiser-to-buyer contacts on apartments priced between €90,000 and €180,000 now exceeds ten per advertisement.

Geographically the squeeze is uneven. Idealista reads the deepest shortfall in the Distrito do Porto and the Algarve interior, where the share of listings under €300,000 has fallen below 25% of the total. The Lisbon metropolitan area's affordable supply continues to compress alongside the May asking-price record of €6,124/m² we covered earlier this week, but the Lisboa under-€300,000 stock now sits almost entirely outside the urban perimeter — Setúbal, Almada and Sintra interior parishes carry the bulk of what remains accessible to a household earning the median Lisboa-area wage. The Distrito de Bragança and the Beira interior continue to offer the deepest under-€300,000 inventory but on a base where transaction volumes are a small fraction of the metropolitan totals.

The IMT Jovem (Imposto Municipal sobre as Transmissões Onerosas de Imóveis Jovem — Young Buyer Municipal Real Estate Transfer Tax) regime is the main demand-side amplifier Idealista's report flags. The exemption — full IMT relief on the first €316,772 of acquisition price and partial relief up to €633,453 for buyers up to age 35 — concentrates the willingness-to-bid premium of younger buyers exactly inside the band where supply is shrinking fastest. In effect, the affordable-segment market now combines a structurally compressed inventory with an artificially intensified demand curve, and the contact-density and time-to-sale metrics Idealista reports show the resulting friction in the consumer experience.

The structural drivers behind the affordable-supply collapse are well rehearsed but the Q1 reading tightens the framing. Construction completions sit at roughly 27,000 dwellings annualised — well below the 70,000-plus the housing economist consensus says Portugal needs to clear the demand backlog. The 2024 INE ICCHN construction-cost index reads 5.9% year-on-year in April 2026, which mechanically pushes new builds into higher price bands. Foreign buyer demand in the Lisbon and Algarve coastal corridors continues to bid up the upper end of the inventory and pull stock out of the affordable segment as owners refurbish-and-flip. The IHRU's €1.85 billion programme for 12,000 affordable homes covered earlier this month is the largest counter-cyclical public-stock injection on the books, but the delivery window stretches into 2028 and does not relieve the Q1-Q2 2026 squeeze the Idealista data are reading.

The Banco de Portugal's parallel consultation with the banks on tightening the taxa de esforço (debt-service-to-income ratio) is the policy adjacent to the supply squeeze. If the macroprudential threshold tightens, the credit-eligible buyer pool inside the under-€300,000 segment shrinks, which on the margin could ease the contact density on each listing — but at the cost of further excluding lower-income buyers from the formal credit channel entirely. The Government's most concrete near-term lever is the IMT Jovem regime itself; the Ministério das Finanças has signalled that it is keeping the parameters under review and could narrow the eligibility band in the OE2027 cycle if the demand-side concentration continues to outpace supply.

What This Means for Buyers, Sellers and Renters

• If you are buying under €300,000, your competition is roughly ten other contacts per advert. The 80-day average time-to-sale and the 10-plus contact density mean offers above asking, fast financing pre-approval and willingness to skip contingencies are now the differentiating factors. If you cannot move within a week of a property appearing on Idealista, you are unlikely to convert.
• Sellers in the under-€300,000 band hold the strongest market in years. A property priced just below the IMT Jovem €316,772 ceiling will draw the broadest demand pool — both qualifying buyers and non-qualifying ones who see the price point as the natural anchor. Setting an asking price that uses the IMT Jovem ceiling as a target rather than a constraint converts more rapidly than a higher list.
• Renters face a lagged knock-on from the affordable-purchase squeeze. First-time buyers who cannot find under-€300,000 stock stay in the rental market longer, which adds incremental tension to the rental cycle as the 2026 summer-relocation window opens. The Lisboa and Porto rental tape — already up 8-12% year-on-year on the Idealista monthly read — does not have much slack to absorb a longer first-time-buyer hold-back.
• Public-stock buyers should watch the IHRU 12,000-home pipeline. Affordable-segment supply will not materially recover before the IHRU programme starts delivering at scale in 2027-2028. If you can wait, the relative weight of the squeeze should ease over the medium term; if you cannot, factor in two to three full search cycles before converting.

The full Idealista Q1 2026 supply report is at idealista.pt/news; INE's ICCHN construction-cost series is at ine.pt; and the Banco de Portugal taxa-de-esforço consultation is at bportugal.pt. We will return to the affordability story when the IHRU publishes its Q2 progress report on the €1.85 billion programme.